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Adding new algorithms of adquisition:

Browse Source 
gps_l1_ca_pcps_multithread_acquisition
     gps_l1_ca_pcps_tong_acquisition
     galileo_e1_pcps_cccwsr_ambiguous_acquisition
     galileo_e1_pcps_tong_ambiguous_acquisition
     galileo_e1_pcps_8ms_ambiguous_acquisition

and test for all the algorithms.


git-svn-id: https://svn.code.sf.net/p/gnss-sdr/code/trunk@411 64b25241-fba3-4117-9849-534c7e92360d
This commit is contained in:
Luis Esteve 2013-08-28 17:17:57 +00:00
parent 5b7027206b
commit 2f6c75be76
49 changed files with 10117 additions and 247 deletions
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18
conf/gnss-sdr.conf
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@ -29,8 +29,8 @@ GNSS-SDR.SUPL_CI=0x31b0
SignalSource.implementation=File_Signal_Source
;#filename: path to file with the captured GNSS signal samples to be processed
SignalSource.filename=/media/DATALOGGER/Agilent GPS Generator/cap2/agilent_cap2.dat
;SignalSource.filename=/media/DATALOGGER/Agilent GPS Generator/cap2/agilent_cap2.dat
SignalSource.filename=/media/DATA/Proyectos/Signals/cttc_2012_07_26/cp_cttc_2012_07_26_n3_4Msps.dat
;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
SignalSource.item_type=gr_complex
@ -272,21 +272,25 @@ Acquisition.item_type=gr_complex
;#if: Signal intermediate frequency in [Hz]
Acquisition.if=0
;#sampled_ms: Signal block duration for the acquisition signal detection [ms]
Acquisition.sampled_ms=1
Acquisition.coherent_integration_time_ms=1
;#implementation: Acquisition algorithm selection for this channel: [GPS_L1_CA_PCPS_Acquisition] or [Galileo_E1_PCPS_Ambiguous_Acquisition]
Acquisition.implementation=GPS_L1_CA_PCPS_Acquisition
;#threshold: Acquisition threshold
;#threshold: Acquisition threshold. It will be ignored if pfa is defined.
Acquisition.threshold=0.005
;#pfa: Acquisition false alarm probability. This option overrides the threshold option. Only use with implementations: [GPS_L1_CA_PCPS_Acquisition] or [Galileo_E1_PCPS_Ambiguous_Acquisition]
;#pfa: Acquisition false alarm probability. This option overrides the threshold option. Only use with implementations: [GPS_L1_CA_PCPS_Acquisition] or [Galileo_E1_PCPS_Ambiguous_Acquisition]
Acquisition.pfa=0.0001
;#doppler_max: Maximum expected Doppler shift [Hz]
Acquisition.doppler_max=10000
;#doppler_max: Doppler step in the grid search [Hz]
Acquisition.doppler_step=500
;#bit_transition_flag: Enable or disable a strategy to deal with bit transitions in GPS signals: process two dwells and take
maximum test statistics. Only use with implementation: [GPS_L1_CA_PCPS_Acquisition] (should not be used for Galileo_E1_PCPS_Ambiguous_Acquisition])
Acquisition.bit_transition_flag=false
;#max_dwells: Maximum number of consecutive dwells to be processed. It will be ignored if bit_transition_flag=true
Acquisition.max_dwells=1
;######### ACQUISITION CHANNELS CONFIG ######
;#The following options are specific to each channel and overwrite the generic options
;#The following options are specific to each channel and overwrite the generic options
;######### ACQUISITION CH 0 CONFIG ############
;Acquisition0.implementation=GPS_L1_CA_PCPS_Acquisition

391
conf/gnss-sdr_acq_CCCWSR.conf Normal file
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@ -0,0 +1,391 @@
; Default configuration file
; You can define your own receiver and invoke it by doing
; gnss-sdr --config_file=my_GNSS_SDR_configuration.conf
;
[GNSS-SDR]
;######### GLOBAL OPTIONS ##################
;internal_fs_hz: Internal signal sampling frequency after the signal conditioning stage [Hz].
GNSS-SDR.internal_fs_hz=4000000
;######### CONTROL_THREAD CONFIG ############
ControlThread.wait_for_flowgraph=false
;######### SUPL RRLP GPS assistance configuration #####
GNSS-SDR.SUPL_gps_enabled=false
GNSS-SDR.SUPL_read_gps_assistance_xml=true
GNSS-SDR.SUPL_gps_ephemeris_server=supl.nokia.com
GNSS-SDR.SUPL_gps_ephemeris_port=7275
GNSS-SDR.SUPL_gps_acquisition_server=supl.google.com
GNSS-SDR.SUPL_gps_acquisition_port=7275
GNSS-SDR.SUPL_MCC=244
GNSS-SDR.SUPL_MNS=5
GNSS-SDR.SUPL_LAC=0x59e2
GNSS-SDR.SUPL_CI=0x31b0
;######### SIGNAL_SOURCE CONFIG ############
;#implementation: Use [File_Signal_Source] or [UHD_Signal_Source] or [GN3S_Signal_Source] (experimental)
SignalSource.implementation=File_Signal_Source
;#filename: path to file with the captured GNSS signal samples to be processed
SignalSource.filename=/media/DATALOGGER/Agilent GPS Generator/cap2/agilent_cap2.dat
;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
SignalSource.item_type=gr_complex
;#sampling_frequency: Original Signal sampling frequency in [Hz]
SignalSource.sampling_frequency=4000000
;#freq: RF front-end center frequency in [Hz]
SignalSource.freq=1575420000
;#gain: Front-end Gain in [dB]
SignalSource.gain=60
;#subdevice: UHD subdevice specification (for USRP1 use A:0 or B:0)
SignalSource.subdevice=B:0
;#samples: Number of samples to be processed. Notice that 0 indicates the entire file.
SignalSource.samples=0
;#repeat: Repeat the processing file. Disable this option in this version
SignalSource.repeat=false
;#dump: Dump the Signal source data to a file. Disable this option in this version
SignalSource.dump=false
SignalSource.dump_filename=../data/signal_source.dat
;#enable_throttle_control: Enabling this option tells the signal source to keep the delay between samples in post processing.
; it helps to not overload the CPU, but the processing time will be longer.
SignalSource.enable_throttle_control=false
;######### SIGNAL_CONDITIONER CONFIG ############
;## It holds blocks to change data type, filter and resample input data.
;#implementation: Use [Pass_Through] or [Signal_Conditioner]
;#[Pass_Through] disables this block and the [DataTypeAdapter], [InputFilter] and [Resampler] blocks
;#[Signal_Conditioner] enables this block. Then you have to configure [DataTypeAdapter], [InputFilter] and [Resampler] blocks
;SignalConditioner.implementation=Signal_Conditioner
SignalConditioner.implementation=Pass_Through
;######### DATA_TYPE_ADAPTER CONFIG ############
;## Changes the type of input data. Please disable it in this version.
;#implementation: [Pass_Through] disables this block
DataTypeAdapter.implementation=Pass_Through
;######### INPUT_FILTER CONFIG ############
;## Filter the input data. Can be combined with frequency translation for IF signals
;#implementation: Use [Pass_Through] or [Fir_Filter] or [Freq_Xlating_Fir_Filter]
;#[Pass_Through] disables this block
;#[Fir_Filter] enables a FIR Filter
;#[Freq_Xlating_Fir_Filter] enables FIR filter and a composite frequency translation that shifts IF down to zero Hz.
;InputFilter.implementation=Fir_Filter
;InputFilter.implementation=Freq_Xlating_Fir_Filter
InputFilter.implementation=Pass_Through
;#dump: Dump the filtered data to a file.
InputFilter.dump=false
;#dump_filename: Log path and filename.
InputFilter.dump_filename=../data/input_filter.dat
;#The following options are used in the filter design of Fir_Filter and Freq_Xlating_Fir_Filter implementation.
;#These options are based on parameters of gnuradio's function: gr_remez.
;#These function calculates the optimal (in the Chebyshev/minimax sense) FIR filter inpulse reponse given a set of band edges, the desired reponse on those bands, and the weight given to the error in those bands.
;#input_item_type: Type and resolution for input signal samples. Use only gr_complex in this version.
InputFilter.input_item_type=gr_complex
;#outut_item_type: Type and resolution for output filtered signal samples. Use only gr_complex in this version.
InputFilter.output_item_type=gr_complex
;#taps_item_type: Type and resolution for the taps of the filter. Use only float in this version.
InputFilter.taps_item_type=float
;#number_of_taps: Number of taps in the filter. Increasing this parameter increases the processing time
InputFilter.number_of_taps=5
;#number_of _bands: Number of frequency bands in the filter.
InputFilter.number_of_bands=2
;#bands: frequency at the band edges [ b1 e1 b2 e2 b3 e3 ...].
;#Frequency is in the range [0, 1], with 1 being the Nyquist frequency (Fs/2)
;#The number of band_begin and band_end elements must match the number of bands
InputFilter.band1_begin=0.0
InputFilter.band1_end=0.45
InputFilter.band2_begin=0.55
InputFilter.band2_end=1.0
;#ampl: desired amplitude at the band edges [ a(b1) a(e1) a(b2) a(e2) ...].
;#The number of ampl_begin and ampl_end elements must match the number of bands
InputFilter.ampl1_begin=1.0
InputFilter.ampl1_end=1.0
InputFilter.ampl2_begin=0.0
InputFilter.ampl2_end=0.0
;#band_error: weighting applied to each band (usually 1).
;#The number of band_error elements must match the number of bands
InputFilter.band1_error=1.0
InputFilter.band2_error=1.0
;#filter_type: one of "bandpass", "hilbert" or "differentiator"
InputFilter.filter_type=bandpass
;#grid_density: determines how accurately the filter will be constructed.
;The minimum value is 16; higher values are slower to compute the filter.
InputFilter.grid_density=16
;#The following options are used only in Freq_Xlating_Fir_Filter implementation.
;#InputFilter.IF is the intermediate frequency (in Hz) shifted down to zero Hz
InputFilter.sampling_frequency=4000000
InputFilter.IF=0
;######### RESAMPLER CONFIG ############
;## Resamples the input data.
;#implementation: Use [Pass_Through] or [Direct_Resampler]
;#[Pass_Through] disables this block
;#[Direct_Resampler] enables a resampler that implements a nearest neigbourhood interpolation
;Resampler.implementation=Direct_Resampler
Resampler.implementation=Pass_Through
;#dump: Dump the resamplered data to a file.
Resampler.dump=false
;#dump_filename: Log path and filename.
Resampler.dump_filename=../data/resampler.dat
;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
Resampler.item_type=gr_complex
;#sample_freq_in: the sample frequency of the input signal
Resampler.sample_freq_in=8000000
;#sample_freq_out: the desired sample frequency of the output signal
Resampler.sample_freq_out=4000000
;######### CHANNELS GLOBAL CONFIG ############
;#count: Number of available satellite channels.
Channels.count=6
;#in_acquisition: Number of channels simultaneously acquiring
Channels.in_acquisition=1
;#system: GPS, GLONASS, Galileo, SBAS or Compass
;#if the option is disabled by default is assigned GPS
Channel.system=Galileo
;#signal:
;# "1C" GPS L1 C/A
;# "1P" GPS L1 P
;# "1W" GPS L1 Z-tracking and similar (AS on)
;# "1Y" GPS L1 Y
;# "1M" GPS L1 M
;# "1N" GPS L1 codeless
;# "2C" GPS L2 C/A
;# "2D" GPS L2 L1(C/A)+(P2-P1) semi-codeless
;# "2S" GPS L2 L2C (M)
;# "2L" GPS L2 L2C (L)
;# "2X" GPS L2 L2C (M+L)
;# "2P" GPS L2 P
;# "2W" GPS L2 Z-tracking and similar (AS on)
;# "2Y" GPS L2 Y
;# "2M" GPS GPS L2 M
;# "2N" GPS L2 codeless
;# "5I" GPS L5 I
;# "5Q" GPS L5 Q
;# "5X" GPS L5 I+Q
;# "1C" GLONASS G1 C/A
;# "1P" GLONASS G1 P
;# "2C" GLONASS G2 C/A (Glonass M)
;# "2P" GLONASS G2 P
;# "1A" GALILEO E1 A (PRS)
;# "1B" GALILEO E1 B (I/NAV OS/CS/SoL)
;# "1C" GALILEO E1 C (no data)
;# "1X" GALILEO E1 B+C
;# "1Z" GALILEO E1 A+B+C
;# "5I" GALILEO E5a I (F/NAV OS)
;# "5Q" GALILEO E5a Q (no data)
;# "5X" GALILEO E5a I+Q
;# "7I" GALILEO E5b I
;# "7Q" GALILEO E5b Q
;# "7X" GALILEO E5b I+Q
;# "8I" GALILEO E5 I
;# "8Q" GALILEO E5 Q
;# "8X" GALILEO E5 I+Q
;# "6A" GALILEO E6 A
;# "6B" GALILEO E6 B
;# "6C" GALILEO E6 C
;# "6X" GALILEO E6 B+C
;# "6Z" GALILEO E6 A+B+C
;# "1C" SBAS L1 C/A
;# "5I" SBAS L5 I
;# "5Q" SBAS L5 Q
;# "5X" SBAS L5 I+Q
;# "2I" COMPASS E2 I
;# "2Q" COMPASS E2 Q
;# "2X" COMPASS E2 IQ
;# "7I" COMPASS E5b I
;# "7Q" COMPASS E5b Q
;# "7X" COMPASS E5b IQ
;# "6I" COMPASS E6 I
;# "6Q" COMPASS E6 Q
;# "6X" COMPASS E6 IQ
;#if the option is disabled by default is assigned "1C" GPS L1 C/A
Channel.signal=1B
;######### SPECIFIC CHANNELS CONFIG ######
;#The following options are specific to each channel and overwrite the generic options
;######### CHANNEL 0 CONFIG ############
Channel0.system=Galileo
Channel0.signal=1B
;#satellite: Satellite PRN ID for this channel. Disable this option to random search
Channel0.satellite=11
;######### CHANNEL 1 CONFIG ############
Channel1.system=Galileo
Channel1.signal=1B
Channel1.satellite=18
;######### ACQUISITION GLOBAL CONFIG ############
;#dump: Enable or disable the acquisition internal data file logging [true] or [false]
Acquisition.dump=false
;#filename: Log path and filename
Acquisition.dump_filename=./acq_dump.dat
;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
Acquisition.item_type=gr_complex
;#if: Signal intermediate frequency in [Hz]
Acquisition.if=0
;#sampled_ms: Signal block duration for the acquisition signal detection [ms]
Acquisition.coherent_integration_time_ms=4
;#implementation: Acquisition algorithm selection for this channel: [Galileo_E1_PCPS_CCCWSR_Ambiguous_Acquisition]
Acquisition.implementation=Galileo_E1_PCPS_CCCWSR_Ambiguous_Acquisition
;#threshold: Acquisition threshold.
Acquisition.threshold=0.0025
;#doppler_max: Maximum expected Doppler shift [Hz]
Acquisition.doppler_max=10000
;#doppler_max: Doppler step in the grid search [Hz]
Acquisition.doppler_step=500
;#max_dwells: Maximum number of consecutive dwells to be processed. It will be ignored if bit_transition_flag=true
Acquisition.max_dwells=1
;######### ACQUISITION CHANNELS CONFIG ######
;#The following options are specific to each channel and overwrite the generic options
;######### ACQUISITION CH 0 CONFIG ############
;Acquisition0.implementation=Galileo_E1_PCPS_CCCWSR_Ambiguous_Acquisition
;Acquisition0.threshold=0.0025
;Acquisition0.doppler_max=10000
;Acquisition0.doppler_step=250
;#repeat_satellite: Use only jointly with the satellite PRN ID option. The default value is false
;Acquisition0.repeat_satellite = false
;######### ACQUISITION CH 1 CONFIG ############
;Acquisition1.implementation=Galileo_E1_PCPS_CCCWSR_Ambiguous_Acquisition
;Acquisition1.threshold=0.0025
;Acquisition1.doppler_max=10000
;Acquisition1.doppler_step=250
;Acquisition1.repeat_satellite = false
;######### TRACKING GLOBAL CONFIG ############
;#implementation: Selected tracking algorithm: [GPS_L1_CA_DLL_PLL_Tracking] or [GPS_L1_CA_DLL_FLL_PLL_Tracking]
Tracking.implementation=GPS_L1_CA_DLL_PLL_Optim_Tracking
;#item_type: Type and resolution for each of the signal samples. Use only [gr_complex] in this version.
Tracking.item_type=gr_complex
;#sampling_frequency: Signal Intermediate Frequency in [Hz]
Tracking.if=0
;#dump: Enable or disable the Tracking internal binary data file logging [true] or [false]
Tracking.dump=false
;#dump_filename: Log path and filename. Notice that the tracking channel will add "x.dat" where x is the channel number.
Tracking.dump_filename=./tracking_ch_
;#pll_bw_hz: PLL loop filter bandwidth [Hz]
Tracking.pll_bw_hz=50.0;
;#dll_bw_hz: DLL loop filter bandwidth [Hz]
Tracking.dll_bw_hz=2.0;
;#fll_bw_hz: FLL loop filter bandwidth [Hz]
Tracking.fll_bw_hz=10.0;
;#order: PLL/DLL loop filter order [2] or [3]
Tracking.order=3;
;#early_late_space_chips: correlator early-late space [chips]. Use [0.5]
Tracking.early_late_space_chips=0.5;
;######### TELEMETRY DECODER CONFIG ############
;#implementation: Use [GPS_L1_CA_Telemetry_Decoder] for GPS L1 C/A.
TelemetryDecoder.implementation=GPS_L1_CA_Telemetry_Decoder
TelemetryDecoder.dump=false
;######### OBSERVABLES CONFIG ############
;#implementation: Use [GPS_L1_CA_Observables] for GPS L1 C/A.
Observables.implementation=GPS_L1_CA_Observables
;#dump: Enable or disable the Observables internal binary data file logging [true] or [false]
Observables.dump=false
;#dump_filename: Log path and filename.
Observables.dump_filename=./observables.dat
;######### PVT CONFIG ############
;#implementation: Position Velocity and Time (PVT) implementation algorithm: Use [GPS_L1_CA_PVT] in this version.
PVT.implementation=GPS_L1_CA_PVT
;#averaging_depth: Number of PVT observations in the moving average algorithm
PVT.averaging_depth=10
;#flag_average: Enables the PVT averaging between output intervals (arithmetic mean) [true] or [false]
PVT.flag_averaging=true
;#output_rate_ms: Period between two PVT outputs. Notice that the minimum period is equal to the tracking integration time (for GPS CA L1 is 1ms) [ms]
PVT.output_rate_ms=100
;#display_rate_ms: Position console print (std::out) interval [ms]. Notice that output_rate_ms<=display_rate_ms.
PVT.display_rate_ms=500
;# RINEX, KML, and NMEA output configuration
;#dump_filename: Log path and filename without extension. Notice that PVT will add ".dat" to the binary dump and ".kml" to GoogleEarth dump.
PVT.dump_filename=./PVT
;#nmea_dump_filename: NMEA log path and filename
PVT.nmea_dump_filename=./gnss_sdr_pvt.nmea;
;#flag_nmea_tty_port: Enable or disable the NMEA log to a serial TTY port (Can be used with real hardware or virtual one)
PVT.flag_nmea_tty_port=true;
;#nmea_dump_devname: serial device descriptor for NMEA logging
PVT.nmea_dump_devname=/dev/pts/4
;#dump: Enable or disable the PVT internal binary data file logging [true] or [false]
PVT.dump=false
;######### OUTPUT_FILTER CONFIG ############
;# Receiver output filter: Leave this block disabled in this version
OutputFilter.implementation=Null_Sink_Output_Filter
OutputFilter.filename=data/gnss-sdr.dat
OutputFilter.item_type=gr_complex

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conf/gnss-sdr_acq_Tong.conf Normal file
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@ -0,0 +1,393 @@
; Default configuration file
; You can define your own receiver and invoke it by doing
; gnss-sdr --config_file=my_GNSS_SDR_configuration.conf
;
[GNSS-SDR]
;######### GLOBAL OPTIONS ##################
;internal_fs_hz: Internal signal sampling frequency after the signal conditioning stage [Hz].
GNSS-SDR.internal_fs_hz=4000000
;######### CONTROL_THREAD CONFIG ############
ControlThread.wait_for_flowgraph=false
;######### SUPL RRLP GPS assistance configuration #####
GNSS-SDR.SUPL_gps_enabled=false
GNSS-SDR.SUPL_read_gps_assistance_xml=true
GNSS-SDR.SUPL_gps_ephemeris_server=supl.nokia.com
GNSS-SDR.SUPL_gps_ephemeris_port=7275
GNSS-SDR.SUPL_gps_acquisition_server=supl.google.com
GNSS-SDR.SUPL_gps_acquisition_port=7275
GNSS-SDR.SUPL_MCC=244
GNSS-SDR.SUPL_MNS=5
GNSS-SDR.SUPL_LAC=0x59e2
GNSS-SDR.SUPL_CI=0x31b0
;######### SIGNAL_SOURCE CONFIG ############
;#implementation: Use [File_Signal_Source] or [UHD_Signal_Source] or [GN3S_Signal_Source] (experimental)
SignalSource.implementation=File_Signal_Source
;#filename: path to file with the captured GNSS signal samples to be processed
SignalSource.filename=/media/DATALOGGER/Agilent GPS Generator/cap2/agilent_cap2.dat
;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
SignalSource.item_type=gr_complex
;#sampling_frequency: Original Signal sampling frequency in [Hz]
SignalSource.sampling_frequency=4000000
;#freq: RF front-end center frequency in [Hz]
SignalSource.freq=1575420000
;#gain: Front-end Gain in [dB]
SignalSource.gain=60
;#subdevice: UHD subdevice specification (for USRP1 use A:0 or B:0)
SignalSource.subdevice=B:0
;#samples: Number of samples to be processed. Notice that 0 indicates the entire file.
SignalSource.samples=0
;#repeat: Repeat the processing file. Disable this option in this version
SignalSource.repeat=false
;#dump: Dump the Signal source data to a file. Disable this option in this version
SignalSource.dump=false
SignalSource.dump_filename=../data/signal_source.dat
;#enable_throttle_control: Enabling this option tells the signal source to keep the delay between samples in post processing.
; it helps to not overload the CPU, but the processing time will be longer.
SignalSource.enable_throttle_control=false
;######### SIGNAL_CONDITIONER CONFIG ############
;## It holds blocks to change data type, filter and resample input data.
;#implementation: Use [Pass_Through] or [Signal_Conditioner]
;#[Pass_Through] disables this block and the [DataTypeAdapter], [InputFilter] and [Resampler] blocks
;#[Signal_Conditioner] enables this block. Then you have to configure [DataTypeAdapter], [InputFilter] and [Resampler] blocks
;SignalConditioner.implementation=Signal_Conditioner
SignalConditioner.implementation=Pass_Through
;######### DATA_TYPE_ADAPTER CONFIG ############
;## Changes the type of input data. Please disable it in this version.
;#implementation: [Pass_Through] disables this block
DataTypeAdapter.implementation=Pass_Through
;######### INPUT_FILTER CONFIG ############
;## Filter the input data. Can be combined with frequency translation for IF signals
;#implementation: Use [Pass_Through] or [Fir_Filter] or [Freq_Xlating_Fir_Filter]
;#[Pass_Through] disables this block
;#[Fir_Filter] enables a FIR Filter
;#[Freq_Xlating_Fir_Filter] enables FIR filter and a composite frequency translation that shifts IF down to zero Hz.
;InputFilter.implementation=Fir_Filter
;InputFilter.implementation=Freq_Xlating_Fir_Filter
InputFilter.implementation=Pass_Through
;#dump: Dump the filtered data to a file.
InputFilter.dump=false
;#dump_filename: Log path and filename.
InputFilter.dump_filename=../data/input_filter.dat
;#The following options are used in the filter design of Fir_Filter and Freq_Xlating_Fir_Filter implementation.
;#These options are based on parameters of gnuradio's function: gr_remez.
;#These function calculates the optimal (in the Chebyshev/minimax sense) FIR filter inpulse reponse given a set of band edges, the desired reponse on those bands, and the weight given to the error in those bands.
;#input_item_type: Type and resolution for input signal samples. Use only gr_complex in this version.
InputFilter.input_item_type=gr_complex
;#outut_item_type: Type and resolution for output filtered signal samples. Use only gr_complex in this version.
InputFilter.output_item_type=gr_complex
;#taps_item_type: Type and resolution for the taps of the filter. Use only float in this version.
InputFilter.taps_item_type=float
;#number_of_taps: Number of taps in the filter. Increasing this parameter increases the processing time
InputFilter.number_of_taps=5
;#number_of _bands: Number of frequency bands in the filter.
InputFilter.number_of_bands=2
;#bands: frequency at the band edges [ b1 e1 b2 e2 b3 e3 ...].
;#Frequency is in the range [0, 1], with 1 being the Nyquist frequency (Fs/2)
;#The number of band_begin and band_end elements must match the number of bands
InputFilter.band1_begin=0.0
InputFilter.band1_end=0.45
InputFilter.band2_begin=0.55
InputFilter.band2_end=1.0
;#ampl: desired amplitude at the band edges [ a(b1) a(e1) a(b2) a(e2) ...].
;#The number of ampl_begin and ampl_end elements must match the number of bands
InputFilter.ampl1_begin=1.0
InputFilter.ampl1_end=1.0
InputFilter.ampl2_begin=0.0
InputFilter.ampl2_end=0.0
;#band_error: weighting applied to each band (usually 1).
;#The number of band_error elements must match the number of bands
InputFilter.band1_error=1.0
InputFilter.band2_error=1.0
;#filter_type: one of "bandpass", "hilbert" or "differentiator"
InputFilter.filter_type=bandpass
;#grid_density: determines how accurately the filter will be constructed.
;The minimum value is 16; higher values are slower to compute the filter.
InputFilter.grid_density=16
;#The following options are used only in Freq_Xlating_Fir_Filter implementation.
;#InputFilter.IF is the intermediate frequency (in Hz) shifted down to zero Hz
InputFilter.sampling_frequency=4000000
InputFilter.IF=0
;######### RESAMPLER CONFIG ############
;## Resamples the input data.
;#implementation: Use [Pass_Through] or [Direct_Resampler]
;#[Pass_Through] disables this block
;#[Direct_Resampler] enables a resampler that implements a nearest neigbourhood interpolation
;Resampler.implementation=Direct_Resampler
Resampler.implementation=Pass_Through
;#dump: Dump the resamplered data to a file.
Resampler.dump=false
;#dump_filename: Log path and filename.
Resampler.dump_filename=../data/resampler.dat
;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
Resampler.item_type=gr_complex
;#sample_freq_in: the sample frequency of the input signal
Resampler.sample_freq_in=8000000
;#sample_freq_out: the desired sample frequency of the output signal
Resampler.sample_freq_out=4000000
;######### CHANNELS GLOBAL CONFIG ############
;#count: Number of available satellite channels.
Channels.count=6
;#in_acquisition: Number of channels simultaneously acquiring
Channels.in_acquisition=1
;#system: GPS, GLONASS, Galileo, SBAS or Compass
;#if the option is disabled by default is assigned GPS
Channel.system=GPS
;#signal:
;# "1C" GPS L1 C/A
;# "1P" GPS L1 P
;# "1W" GPS L1 Z-tracking and similar (AS on)
;# "1Y" GPS L1 Y
;# "1M" GPS L1 M
;# "1N" GPS L1 codeless
;# "2C" GPS L2 C/A
;# "2D" GPS L2 L1(C/A)+(P2-P1) semi-codeless
;# "2S" GPS L2 L2C (M)
;# "2L" GPS L2 L2C (L)
;# "2X" GPS L2 L2C (M+L)
;# "2P" GPS L2 P
;# "2W" GPS L2 Z-tracking and similar (AS on)
;# "2Y" GPS L2 Y
;# "2M" GPS GPS L2 M
;# "2N" GPS L2 codeless
;# "5I" GPS L5 I
;# "5Q" GPS L5 Q
;# "5X" GPS L5 I+Q
;# "1C" GLONASS G1 C/A
;# "1P" GLONASS G1 P
;# "2C" GLONASS G2 C/A (Glonass M)
;# "2P" GLONASS G2 P
;# "1A" GALILEO E1 A (PRS)
;# "1B" GALILEO E1 B (I/NAV OS/CS/SoL)
;# "1C" GALILEO E1 C (no data)
;# "1X" GALILEO E1 B+C
;# "1Z" GALILEO E1 A+B+C
;# "5I" GALILEO E5a I (F/NAV OS)
;# "5Q" GALILEO E5a Q (no data)
;# "5X" GALILEO E5a I+Q
;# "7I" GALILEO E5b I
;# "7Q" GALILEO E5b Q
;# "7X" GALILEO E5b I+Q
;# "8I" GALILEO E5 I
;# "8Q" GALILEO E5 Q
;# "8X" GALILEO E5 I+Q
;# "6A" GALILEO E6 A
;# "6B" GALILEO E6 B
;# "6C" GALILEO E6 C
;# "6X" GALILEO E6 B+C
;# "6Z" GALILEO E6 A+B+C
;# "1C" SBAS L1 C/A
;# "5I" SBAS L5 I
;# "5Q" SBAS L5 Q
;# "5X" SBAS L5 I+Q
;# "2I" COMPASS E2 I
;# "2Q" COMPASS E2 Q
;# "2X" COMPASS E2 IQ
;# "7I" COMPASS E5b I
;# "7Q" COMPASS E5b Q
;# "7X" COMPASS E5b IQ
;# "6I" COMPASS E6 I
;# "6Q" COMPASS E6 Q
;# "6X" COMPASS E6 IQ
;#if the option is disabled by default is assigned "1C" GPS L1 C/A
Channel.signal=1C
;######### SPECIFIC CHANNELS CONFIG ######
;#The following options are specific to each channel and overwrite the generic options
;######### CHANNEL 0 CONFIG ############
Channel0.system=GPS
Channel0.signal=1C
;#satellite: Satellite PRN ID for this channel. Disable this option to random search
Channel0.satellite=11
;######### CHANNEL 1 CONFIG ############
Channel1.system=GPS
Channel1.signal=1C
Channel1.satellite=18
;######### ACQUISITION GLOBAL CONFIG ############
;#dump: Enable or disable the acquisition internal data file logging [true] or [false]
Acquisition.dump=false
;#filename: Log path and filename
Acquisition.dump_filename=./acq_dump.dat
;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
Acquisition.item_type=gr_complex
;#if: Signal intermediate frequency in [Hz]
Acquisition.if=0
;#sampled_ms: Signal block duration for the acquisition signal detection [ms]
Acquisition.coherent_integration_time_ms=1
;#implementation: Acquisition algorithm selection for this channel: [GPS_L1_CA_PCPS_Tong_Acquisition] or [Galileo_E1_PCPS_Tong_Ambiguous_Acquisition]
Acquisition.implementation=GPS_L1_CA_PCPS_Tong_Acquisition
;#threshold: Acquisition threshold.
Acquisition.threshold=0.004
;#doppler_max: Maximum expected Doppler shift [Hz]
Acquisition.doppler_max=10000
;#doppler_max: Doppler step in the grid search [Hz]
Acquisition.doppler_step=500
;#tong_init_val: Initial value for the Tong counter.
Acquisition.tong_init_val=5
;#tong_max_val: Maximum value for the Tong counter.
Acquisition.tong_max_val=10
;######### ACQUISITION CHANNELS CONFIG ######
;#The following options are specific to each channel and overwrite the generic options
;######### ACQUISITION CH 0 CONFIG ############
;Acquisition0.implementation=GPS_L1_CA_PCPS_Tong_Acquisition
;Acquisition0.threshold=0.004
;Acquisition0.doppler_max=10000
;Acquisition0.doppler_step=250
;#repeat_satellite: Use only jointly with the satellite PRN ID option. The default value is false
;Acquisition0.repeat_satellite = false
;######### ACQUISITION CH 1 CONFIG ############
;Acquisition1.implementation=GPS_L1_CA_PCPS_Tong_Acquisition
;Acquisition1.threshold=0.004
;Acquisition1.doppler_max=10000
;Acquisition1.doppler_step=250
;Acquisition1.repeat_satellite = false
;######### TRACKING GLOBAL CONFIG ############
;#implementation: Selected tracking algorithm: [GPS_L1_CA_DLL_PLL_Tracking] or [GPS_L1_CA_DLL_FLL_PLL_Tracking]
Tracking.implementation=GPS_L1_CA_DLL_PLL_Optim_Tracking
;#item_type: Type and resolution for each of the signal samples. Use only [gr_complex] in this version.
Tracking.item_type=gr_complex
;#sampling_frequency: Signal Intermediate Frequency in [Hz]
Tracking.if=0
;#dump: Enable or disable the Tracking internal binary data file logging [true] or [false]
Tracking.dump=false
;#dump_filename: Log path and filename. Notice that the tracking channel will add "x.dat" where x is the channel number.
Tracking.dump_filename=./tracking_ch_
;#pll_bw_hz: PLL loop filter bandwidth [Hz]
Tracking.pll_bw_hz=50.0;
;#dll_bw_hz: DLL loop filter bandwidth [Hz]
Tracking.dll_bw_hz=2.0;
;#fll_bw_hz: FLL loop filter bandwidth [Hz]
Tracking.fll_bw_hz=10.0;
;#order: PLL/DLL loop filter order [2] or [3]
Tracking.order=3;
;#early_late_space_chips: correlator early-late space [chips]. Use [0.5]
Tracking.early_late_space_chips=0.5;
;######### TELEMETRY DECODER CONFIG ############
;#implementation: Use [GPS_L1_CA_Telemetry_Decoder] for GPS L1 C/A.
TelemetryDecoder.implementation=GPS_L1_CA_Telemetry_Decoder
TelemetryDecoder.dump=false
;######### OBSERVABLES CONFIG ############
;#implementation: Use [GPS_L1_CA_Observables] for GPS L1 C/A.
Observables.implementation=GPS_L1_CA_Observables
;#dump: Enable or disable the Observables internal binary data file logging [true] or [false]
Observables.dump=false
;#dump_filename: Log path and filename.
Observables.dump_filename=./observables.dat
;######### PVT CONFIG ############
;#implementation: Position Velocity and Time (PVT) implementation algorithm: Use [GPS_L1_CA_PVT] in this version.
PVT.implementation=GPS_L1_CA_PVT
;#averaging_depth: Number of PVT observations in the moving average algorithm
PVT.averaging_depth=10
;#flag_average: Enables the PVT averaging between output intervals (arithmetic mean) [true] or [false]
PVT.flag_averaging=true
;#output_rate_ms: Period between two PVT outputs. Notice that the minimum period is equal to the tracking integration time (for GPS CA L1 is 1ms) [ms]
PVT.output_rate_ms=100
;#display_rate_ms: Position console print (std::out) interval [ms]. Notice that output_rate_ms<=display_rate_ms.
PVT.display_rate_ms=500
;# RINEX, KML, and NMEA output configuration
;#dump_filename: Log path and filename without extension. Notice that PVT will add ".dat" to the binary dump and ".kml" to GoogleEarth dump.
PVT.dump_filename=./PVT
;#nmea_dump_filename: NMEA log path and filename
PVT.nmea_dump_filename=./gnss_sdr_pvt.nmea;
;#flag_nmea_tty_port: Enable or disable the NMEA log to a serial TTY port (Can be used with real hardware or virtual one)
PVT.flag_nmea_tty_port=true;
;#nmea_dump_devname: serial device descriptor for NMEA logging
PVT.nmea_dump_devname=/dev/pts/4
;#dump: Enable or disable the PVT internal binary data file logging [true] or [false]
PVT.dump=false
;######### OUTPUT_FILTER CONFIG ############
;# Receiver output filter: Leave this block disabled in this version
OutputFilter.implementation=Null_Sink_Output_Filter
OutputFilter.filename=data/gnss-sdr.dat
OutputFilter.item_type=gr_complex

9
src/algorithms/acquisition/adapters/CMakeLists.txt
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@ -17,10 +17,15 @@
#
set(ACQ_ADAPTER_SOURCES
galileo_e1_pcps_ambiguous_acquisition.cc
gps_l1_ca_pcps_acquisition.cc
gps_l1_ca_pcps_acquisition.cc
gps_l1_ca_pcps_multithread_acquisition.cc
gps_l1_ca_pcps_assisted_acquisition.cc
gps_l1_ca_pcps_acquisition_fine_doppler.cc
gps_l1_ca_pcps_tong_acquisition.cc
galileo_e1_pcps_ambiguous_acquisition.cc
galileo_e1_pcps_cccwsr_ambiguous_acquisition.cc
galileo_e1_pcps_tong_ambiguous_acquisition.cc
galileo_e1_pcps_8ms_ambiguous_acquisition.cc
)
include_directories(

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@ -0,0 +1,312 @@
/*!
* \file galileo_e1_pcps_8ms_ambiguous_acquisition.cc
* \brief Adapts a Galileo PCPS 8ms acquisition block to an
* AcquisitionInterface for Galileo E1 Signals
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "galileo_e1_pcps_8ms_ambiguous_acquisition.h"
#include "galileo_e1_signal_processing.h"
#include "Galileo_E1.h"
#include "configuration_interface.h"
#include <iostream>
#include <string>
#include <boost/lexical_cast.hpp>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <boost/math/distributions/exponential.hpp>
using google::LogMessage;
GalileoE1Pcps8msAmbiguousAcquisition::GalileoE1Pcps8msAmbiguousAcquisition(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams,
boost::shared_ptr<gr::msg_queue> queue) :
role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(queue)
{
configuration_ = configuration;
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "../data/acquisition.dat";
DLOG(INFO) << "role " << role;
item_type_ = configuration_->property(role + ".item_type",
default_item_type);
fs_in_ = configuration_->property("GNSS-SDR.internal_fs_hz", 4000000);
if_ = configuration_->property(role + ".ifreq", 0);
dump_ = configuration_->property(role + ".dump", false);
shift_resolution_ = configuration_->property(role + ".doppler_max", 15);
sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 4);
if (sampled_ms_ % 4 != 0)
{
sampled_ms_ = (int)(sampled_ms_/4) * 4;
LOG_AT_LEVEL(WARNING) << "coherent_integration_time should be multiple of "
<< "Galileo code length (4 ms). coherent_integration_time = "
<< sampled_ms_ << " ms will be used.";
}
max_dwells_ = configuration_->property(role + ".max_dwells", 1);
dump_filename_ = configuration_->property(role + ".dump_filename",
default_dump_filename);
//--- Find number of samples per spreading code (4 ms) -----------------
code_length_ = round(
fs_in_
/ (Galileo_E1_CODE_CHIP_RATE_HZ
/ Galileo_E1_B_CODE_LENGTH_CHIPS));
vector_length_ = code_length_ * (int)(sampled_ms_/4);
int samples_per_ms = code_length_ / 4;
code_ = new gr_complex[vector_length_];
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
acquisition_cc_ = galileo_pcps_8ms_make_acquisition_cc(sampled_ms_, max_dwells_,
shift_resolution_, if_, fs_in_, samples_per_ms, code_length_,
queue_, dump_, dump_filename_);
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_);
DLOG(INFO) << "stream_to_vector("
<< stream_to_vector_->unique_id() << ")";
DLOG(INFO) << "acquisition(" << acquisition_cc_->unique_id()
<< ")";
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_
<< " unknown acquisition item type";
}
}
GalileoE1Pcps8msAmbiguousAcquisition::~GalileoE1Pcps8msAmbiguousAcquisition()
{
delete[] code_;
}
void
GalileoE1Pcps8msAmbiguousAcquisition::set_channel(unsigned int channel)
{
channel_ = channel;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel(channel_);
}
}
void
GalileoE1Pcps8msAmbiguousAcquisition::set_threshold(float threshold)
{
float pfa = configuration_->property(role_+ boost::lexical_cast<std::string>(channel_) + ".pfa", 0.0);
if(pfa==0.0) pfa = configuration_->property(role_+".pfa", 0.0);
if(pfa==0.0)
{
threshold_ = threshold;
}
else
{
threshold_ = calculate_threshold(pfa);
}
DLOG(INFO) <<"Channel "<<channel_<<" Threshold = " << threshold_;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_threshold(threshold_);
}
}
void
GalileoE1Pcps8msAmbiguousAcquisition::set_doppler_max(unsigned int doppler_max)
{
doppler_max_ = doppler_max;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_max(doppler_max_);
}
}
void
GalileoE1Pcps8msAmbiguousAcquisition::set_doppler_step(unsigned int doppler_step)
{
doppler_step_ = doppler_step;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_step(doppler_step_);
}
}
void
GalileoE1Pcps8msAmbiguousAcquisition::set_channel_queue(
concurrent_queue<int> *channel_internal_queue)
{
channel_internal_queue_ = channel_internal_queue;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel_queue(channel_internal_queue_);
}
}
void
GalileoE1Pcps8msAmbiguousAcquisition::set_gnss_synchro(
Gnss_Synchro* gnss_synchro)
{
gnss_synchro_ = gnss_synchro;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_gnss_synchro(gnss_synchro_);
}
}
signed int
GalileoE1Pcps8msAmbiguousAcquisition::mag()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->mag();
}
else
{
return 0;
}
}
void
GalileoE1Pcps8msAmbiguousAcquisition::init()
{
acquisition_cc_->init();
set_local_code();
}
void
GalileoE1Pcps8msAmbiguousAcquisition::set_local_code()
{
if (item_type_.compare("gr_complex") == 0)
{
bool cboc = configuration_->property(
"Acquisition" + boost::lexical_cast<std::string>(channel_)
+ ".cboc", false);
std::complex<float> * code = new std::complex<float>[code_length_];
galileo_e1_code_gen_complex_sampled(code, gnss_synchro_->Signal,
cboc, gnss_synchro_->PRN, fs_in_, 0, false);
for (unsigned int i = 0; i < sampled_ms_/4; i++)
{
memcpy(&(code_[i*code_length_]), code,
sizeof(gr_complex)*code_length_);
}
acquisition_cc_->set_local_code(code_);
delete[] code;
}
}
void
GalileoE1Pcps8msAmbiguousAcquisition::reset()
{
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_active(true);
}
}
float GalileoE1Pcps8msAmbiguousAcquisition::calculate_threshold(float pfa)
{
unsigned int frequency_bins = 0;
for (int doppler = (int)(-doppler_max_); doppler <= (int)doppler_max_; doppler += doppler_step_)
{
frequency_bins++;
}
DLOG(INFO) <<"Channel "<<channel_<<" Pfa = "<< pfa;
unsigned int ncells = vector_length_*frequency_bins;
double exponent = 1/(double)ncells;
double val = pow(1.0-pfa,exponent);
double lambda = double(vector_length_);
boost::math::exponential_distribution<double> mydist (lambda);
float threshold = (float)quantile(mydist,val);
return threshold;
}
void
GalileoE1Pcps8msAmbiguousAcquisition::connect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
void
GalileoE1Pcps8msAmbiguousAcquisition::disconnect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
gr::basic_block_sptr GalileoE1Pcps8msAmbiguousAcquisition::get_left_block()
{
return stream_to_vector_;
}
gr::basic_block_sptr GalileoE1Pcps8msAmbiguousAcquisition::get_right_block()
{
return acquisition_cc_;
}

159
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/*!
* \file galileo_e1_pcps_8ms_ambiguous_acquisition.h
* \brief Adapts a PCPS 8ms acquisition block to an
* AcquisitionInterface for Galileo E1 Signals
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_GALILEO_E1_PCPS_8MS_AMBIGUOUS_ACQUISITION_H_
#define GNSS_SDR_GALILEO_E1_PCPS_8MS_AMBIGUOUS_ACQUISITION_H_
#include "gnss_synchro.h"
#include "acquisition_interface.h"
#include "galileo_pcps_8ms_acquisition_cc.h"
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/stream_to_vector.h>
class ConfigurationInterface;
/*!
* \brief Adapts a PCPS 8ms acquisition block to an
* AcquisitionInterface for Galileo E1 Signals
*/
class GalileoE1Pcps8msAmbiguousAcquisition: public AcquisitionInterface
{
public:
GalileoE1Pcps8msAmbiguousAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams,
unsigned int out_streams, boost::shared_ptr<gr::msg_queue> queue);
virtual ~GalileoE1Pcps8msAmbiguousAcquisition();
std::string role()
{
return role_;
}
/*!
* \brief Returns "Galileo_E1_PCPS_8ms_Ambiguous_Acquisition"
*/
std::string implementation()
{
return "Galileo_E1_PCPS_8ms_Ambiguous_Acquisition";
}
size_t item_size()
{
return item_size_;
}
void connect(gr::top_block_sptr top_block);
void disconnect(gr::top_block_sptr top_block);
gr::basic_block_sptr get_left_block();
gr::basic_block_sptr get_right_block();
/*!
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
* to efficiently exchange synchronization data between acquisition and
* tracking blocks
*/
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro);
/*!
* \brief Set acquisition channel unique ID
*/
void set_channel(unsigned int channel);
/*!
* \brief Set statistics threshold of PCPS algorithm
*/
void set_threshold(float threshold);
/*!
* \brief Set maximum Doppler off grid search
*/
void set_doppler_max(unsigned int doppler_max);
/*!
* \brief Set Doppler steps for the grid search
*/
void set_doppler_step(unsigned int doppler_step);
/*!
* \brief Set tracking channel internal queue
*/
void set_channel_queue(concurrent_queue<int> *channel_internal_queue);
/*!
* \brief Initializes acquisition algorithm.
*/
void init();
/*!
* \brief Sets local code for Galileo E1 PCPS acquisition algorithm.
*/
void set_local_code();
/*!
* \brief Returns the maximum peak of grid search
*/
signed int mag();
/*!
* \brief Restart acquisition algorithm
*/
void reset();
private:
ConfigurationInterface* configuration_;
galileo_pcps_8ms_acquisition_cc_sptr acquisition_cc_;
gr::blocks::stream_to_vector::sptr stream_to_vector_;
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
unsigned int code_length_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int shift_resolution_;
unsigned int sampled_ms_;
unsigned int max_dwells_;
long fs_in_;
long if_;
bool dump_;
std::string dump_filename_;
std::complex<float> * code_;
Gnss_Synchro * gnss_synchro_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
boost::shared_ptr<gr::msg_queue> queue_;
concurrent_queue<int> *channel_internal_queue_;
float calculate_threshold(float pfa);
};
#endif /* GNSS_SDR_GALILEO_E1_PCPS_8MS_AMBIGUOUS_ACQUISITION_H_ */

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@ -6,7 +6,7 @@
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2011 (see AUTHORS file for a list of contributors)
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
@ -61,30 +61,51 @@ GalileoE1PcpsAmbiguousAcquisition::GalileoE1PcpsAmbiguousAcquisition(
if_ = configuration_->property(role + ".ifreq", 0);
dump_ = configuration_->property(role + ".dump", false);
shift_resolution_ = configuration_->property(role + ".doppler_max", 15);
sampled_ms_ = configuration_->property(role + ".sampled_ms", 4);
sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 4);
if (sampled_ms_ % 4 != 0)
{
sampled_ms_ = (int)(sampled_ms_/4) * 4;
LOG_AT_LEVEL(WARNING) << "coherent_integration_time should be multiple of "
<< "Galileo code length (4 ms). coherent_integration_time = "
<< sampled_ms_ << " ms will be used.";
}
bit_transition_flag_ = configuration_->property(role + ".bit_transition_flag", false);
if (!bit_transition_flag_)
{
max_dwells_ = configuration_->property(role + ".max_dwells", 1);
}
else
{
max_dwells_ = 2;
}
dump_filename_ = configuration_->property(role + ".dump_filename",
default_dump_filename);
//--- Find number of samples per spreading code (4 ms) -----------------
vector_length_ = round(
code_length_ = round(
fs_in_
/ (Galileo_E1_CODE_CHIP_RATE_HZ
/ Galileo_E1_B_CODE_LENGTH_CHIPS));
int samples_per_ms = vector_length_ / 4;
vector_length_ = code_length_ * (int)(sampled_ms_/4);
vector_length_ = samples_per_ms * 4;
int samples_per_ms = code_length_ / 4;
code_ = new gr_complex[samples_per_ms*sampled_ms_];
code_ = new gr_complex[vector_length_];
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
acquisition_cc_ = pcps_make_acquisition_cc(sampled_ms_,
shift_resolution_, if_, fs_in_, samples_per_ms, vector_length_,
queue_, dump_, dump_filename_);
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, samples_per_ms * sampled_ms_);
acquisition_cc_ = pcps_make_acquisition_cc(sampled_ms_, max_dwells_,
shift_resolution_, if_, fs_in_, samples_per_ms, code_length_,
bit_transition_flag_, queue_, dump_, dump_filename_);
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_);
DLOG(INFO) << "stream_to_vector("
<< stream_to_vector_->unique_id() << ")";
DLOG(INFO) << "acquisition(" << acquisition_cc_->unique_id()
@ -124,13 +145,13 @@ GalileoE1PcpsAmbiguousAcquisition::set_threshold(float threshold)
if(pfa==0.0) pfa = configuration_->property(role_+".pfa", 0.0);
if(pfa==0.0)
{
threshold_ = threshold;
}
{
threshold_ = threshold;
}
else
{
threshold_ = calculate_threshold(pfa);
}
{
threshold_ = calculate_threshold(pfa);
}
DLOG(INFO) <<"Channel "<<channel_<<" Threshold = " << threshold_;
@ -150,7 +171,6 @@ GalileoE1PcpsAmbiguousAcquisition::set_doppler_max(unsigned int doppler_max)
{
acquisition_cc_->set_doppler_max(doppler_max_);
}
}
@ -162,7 +182,6 @@ GalileoE1PcpsAmbiguousAcquisition::set_doppler_step(unsigned int doppler_step)
{
acquisition_cc_->set_doppler_step(doppler_step_);
}
}
@ -211,6 +230,7 @@ GalileoE1PcpsAmbiguousAcquisition::init()
set_local_code();
}
void
GalileoE1PcpsAmbiguousAcquisition::set_local_code()
{
@ -220,18 +240,20 @@ GalileoE1PcpsAmbiguousAcquisition::set_local_code()
"Acquisition" + boost::lexical_cast<std::string>(channel_)
+ ".cboc", false);
std::complex<float> * code = new std::complex<float>[vector_length_];
std::complex<float> * code = new std::complex<float>[code_length_];
galileo_e1_code_gen_complex_sampled(code, gnss_synchro_->Signal,
cboc, gnss_synchro_->PRN, fs_in_, 0, false);
for (unsigned int i = 0; i < sampled_ms_/4; i++)
{
memcpy(&(code_[i*vector_length_]), code,
sizeof(gr_complex)*vector_length_);
memcpy(&(code_[i*code_length_]), code,
sizeof(gr_complex)*code_length_);
}
acquisition_cc_->set_local_code(code_);
delete[] code;
}
}
@ -255,14 +277,14 @@ float GalileoE1PcpsAmbiguousAcquisition::calculate_threshold(float pfa)
DLOG(INFO) <<"Channel "<<channel_<<" Pfa = "<< pfa;
unsigned int ncells = vector_length_*frequency_bins;
unsigned int ncells = vector_length_*frequency_bins;
double exponent = 1/(double)ncells;
double val = pow(1.0-pfa,exponent);
double lambda = double(vector_length_);
double lambda = double(vector_length_);
boost::math::exponential_distribution<double> mydist (lambda);
float threshold = (float)quantile(mydist,val);
return threshold;
return threshold;
}
@ -273,11 +295,9 @@ GalileoE1PcpsAmbiguousAcquisition::connect(gr::top_block_sptr top_block)
{
top_block->connect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
void
GalileoE1PcpsAmbiguousAcquisition::disconnect(gr::top_block_sptr top_block)
{
@ -288,14 +308,12 @@ GalileoE1PcpsAmbiguousAcquisition::disconnect(gr::top_block_sptr top_block)
}
gr::basic_block_sptr GalileoE1PcpsAmbiguousAcquisition::get_left_block()
{
return stream_to_vector_;
}
gr::basic_block_sptr GalileoE1PcpsAmbiguousAcquisition::get_right_block()
{
return acquisition_cc_;

10
src/algorithms/acquisition/adapters/galileo_e1_pcps_ambiguous_acquisition.h
View File

@ -4,7 +4,6 @@
* Galileo E1 Signals
* \author Luis Esteve, 2012. luis(at)epsilon-formacion.com
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
@ -42,8 +41,8 @@
class ConfigurationInterface;
/*!
* \brief This class adapts a PCPS acquisition block to an AcquisitionInterface
* for Galileo E1 Signals
* \brief This class adapts a PCPS acquisition block to an
* AcquisitionInterface for Galileo E1 Signals
*/
class GalileoE1PcpsAmbiguousAcquisition: public AcquisitionInterface
{
@ -116,7 +115,6 @@ public:
/*!
* \brief Sets local code for Galileo E1 PCPS acquisition algorithm.
*/
void set_local_code();
/*!
@ -136,13 +134,15 @@ private:
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
//unsigned int satellite_;
unsigned int code_length_;
bool bit_transition_flag_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int shift_resolution_;
unsigned int sampled_ms_;
unsigned int max_dwells_;
long fs_in_;
long if_;
bool dump_;

303
src/algorithms/acquisition/adapters/galileo_e1_pcps_cccwsr_ambiguous_acquisition.cc Normal file
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@ -0,0 +1,303 @@
/*!
* \file galileo_e1_pcps_cccwsr_ambiguous_acquisition.cc
* \brief Adapts a PCPS CCCWSR acquisition block to an AcquisitionInterface for
* Galileo E1 Signals
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2011 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "galileo_e1_pcps_cccwsr_ambiguous_acquisition.h"
#include "galileo_e1_signal_processing.h"
#include "Galileo_E1.h"
#include "configuration_interface.h"
#include <iostream>
#include <string>
#include <boost/lexical_cast.hpp>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <boost/math/distributions/exponential.hpp>
#include <volk/volk.h>
using google::LogMessage;
GalileoE1PcpsCccwsrAmbiguousAcquisition::GalileoE1PcpsCccwsrAmbiguousAcquisition(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams,
boost::shared_ptr<gr::msg_queue> queue) :
role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(queue)
{
configuration_ = configuration;
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "../data/acquisition.dat";
DLOG(INFO) << "role " << role;
item_type_ = configuration_->property(role + ".item_type",
default_item_type);
fs_in_ = configuration_->property("GNSS-SDR.internal_fs_hz", 4000000);
if_ = configuration_->property(role + ".ifreq", 0);
dump_ = configuration_->property(role + ".dump", false);
shift_resolution_ = configuration_->property(role + ".doppler_max", 15);
sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 4);
if (sampled_ms_ % 4 != 0)
{
sampled_ms_ = (int)(sampled_ms_/4) * 4;
LOG_AT_LEVEL(WARNING) << "coherent_integration_time should be multiple of "
<< "Galileo code length (4 ms). coherent_integration_time = "
<< sampled_ms_ << " ms will be used.";
}
max_dwells_ = configuration_->property(role + ".max_dwells", 1);
dump_filename_ = configuration_->property(role + ".dump_filename",
default_dump_filename);
//--- Find number of samples per spreading code (4 ms) -----------------
code_length_ = round(
fs_in_
/ (Galileo_E1_CODE_CHIP_RATE_HZ
/ Galileo_E1_B_CODE_LENGTH_CHIPS));
vector_length_ = code_length_ * (int)(sampled_ms_/4);
int samples_per_ms = code_length_ / 4;
code_data_ = new gr_complex[vector_length_];
code_pilot_ = new gr_complex[vector_length_];
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
acquisition_cc_ = pcps_cccwsr_make_acquisition_cc(sampled_ms_, max_dwells_,
shift_resolution_, if_, fs_in_, samples_per_ms, code_length_,
queue_, dump_, dump_filename_);
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_);
DLOG(INFO) << "stream_to_vector("
<< stream_to_vector_->unique_id() << ")";
DLOG(INFO) << "acquisition(" << acquisition_cc_->unique_id()
<< ")";
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_
<< " unknown acquisition item type";
}
}
GalileoE1PcpsCccwsrAmbiguousAcquisition::~GalileoE1PcpsCccwsrAmbiguousAcquisition()
{
delete[] code_data_;
delete[] code_pilot_;
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::set_channel(unsigned int channel)
{
channel_ = channel;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel(channel_);
}
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::set_threshold(float threshold)
{
// float pfa = configuration_->property(role_+ boost::lexical_cast<std::string>(channel_) + ".pfa", 0.0);
// if(pfa==0.0) pfa = configuration_->property(role_+".pfa", 0.0);
// if(pfa==0.0)
// {
// threshold_ = threshold;
// }
// else
// {
// threshold_ = calculate_threshold(pfa);
// }
threshold_ = threshold;
DLOG(INFO) <<"Channel "<<channel_<<" Threshold = " << threshold_;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_threshold(threshold_);
}
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::set_doppler_max(unsigned int doppler_max)
{
doppler_max_ = doppler_max;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_max(doppler_max_);
}
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::set_doppler_step(unsigned int doppler_step)
{
doppler_step_ = doppler_step;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_step(doppler_step_);
}
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::set_channel_queue(
concurrent_queue<int> *channel_internal_queue)
{
channel_internal_queue_ = channel_internal_queue;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel_queue(channel_internal_queue_);
}
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::set_gnss_synchro(
Gnss_Synchro* gnss_synchro)
{
gnss_synchro_ = gnss_synchro;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_gnss_synchro(gnss_synchro_);
}
}
signed int
GalileoE1PcpsCccwsrAmbiguousAcquisition::mag()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->mag();
}
else
{
return 0;
}
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::init()
{
acquisition_cc_->init();
set_local_code();
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::set_local_code()
{
if (item_type_.compare("gr_complex") == 0)
{
bool cboc = configuration_->property(
"Acquisition" + boost::lexical_cast<std::string>(channel_)
+ ".cboc", false);
char signal[3];
strcpy(signal, "1B");
galileo_e1_code_gen_complex_sampled(code_data_, signal,
cboc, gnss_synchro_->PRN, fs_in_, 0, false);
strcpy(signal, "1C");
galileo_e1_code_gen_complex_sampled(code_pilot_, signal,
cboc, gnss_synchro_->PRN, fs_in_, 0, false);
acquisition_cc_->set_local_code(code_data_, code_pilot_);
}
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::reset()
{
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_active(true);
}
}
float GalileoE1PcpsCccwsrAmbiguousAcquisition::calculate_threshold(float pfa)
{
return 0.0;
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::connect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
void
GalileoE1PcpsCccwsrAmbiguousAcquisition::disconnect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
gr::basic_block_sptr GalileoE1PcpsCccwsrAmbiguousAcquisition::get_left_block()
{
return stream_to_vector_;
}
gr::basic_block_sptr GalileoE1PcpsCccwsrAmbiguousAcquisition::get_right_block()
{
return acquisition_cc_;
}

158
src/algorithms/acquisition/adapters/galileo_e1_pcps_cccwsr_ambiguous_acquisition.h Normal file
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@ -0,0 +1,158 @@
/*!
* \file galileo_e1_pcps_cccwsr_ambiguous_acquisition.h
* \brief Adapts a PCPS CCCWSR acquisition block to an AcquisitionInterface for
* Galileo E1 Signals
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_GALILEO_E1_PCPS_CCCWSR_AMBIGUOUS_ACQUISITION_H_
#define GNSS_SDR_GALILEO_E1_PCPS_CCCWSR_AMBIGUOUS_ACQUISITION_H_
#include "gnss_synchro.h"
#include "acquisition_interface.h"
#include "pcps_cccwsr_acquisition_cc.h"
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/stream_to_vector.h>
class ConfigurationInterface;
/*!
* \brief Adapts a PCPS CCCWSR acquisition block to an AcquisitionInterface
* for Galileo E1 Signals
*/
class GalileoE1PcpsCccwsrAmbiguousAcquisition: public AcquisitionInterface
{
public:
GalileoE1PcpsCccwsrAmbiguousAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams,
unsigned int out_streams, boost::shared_ptr<gr::msg_queue> queue);
virtual ~GalileoE1PcpsCccwsrAmbiguousAcquisition();
std::string role()
{
return role_;
}
/*!
* \brief Returns "Galileo_E1_PCPS_CCCWSR_Ambiguous_Acquisition"
*/
std::string implementation()
{
return "Galileo_E1_PCPS_CCCWSR_Ambiguous_Acquisition";
}
size_t item_size()
{
return item_size_;
}
void connect(gr::top_block_sptr top_block);
void disconnect(gr::top_block_sptr top_block);
gr::basic_block_sptr get_left_block();
gr::basic_block_sptr get_right_block();
/*!
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
* to efficiently exchange synchronization data between acquisition and
* tracking blocks
*/
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro);
/*!
* \brief Set acquisition channel unique ID
*/
void set_channel(unsigned int channel);
/*!
* \brief Set statistics threshold of CCCWSR algorithm
*/
void set_threshold(float threshold);
/*!
* \brief Set maximum Doppler off grid search
*/
void set_doppler_max(unsigned int doppler_max);
/*!
* \brief Set Doppler steps for the grid search
*/
void set_doppler_step(unsigned int doppler_step);
/*!
* \brief Set tracking channel internal queue
*/
void set_channel_queue(concurrent_queue<int> *channel_internal_queue);
/*!
* \brief Initializes acquisition algorithm.
*/
void init();
void set_local_code();
/*!
* \brief Returns the maximum peak of grid search
*/
signed int mag();
/*!
* \brief Restart acquisition algorithm
*/
void reset();
private:
ConfigurationInterface* configuration_;
pcps_cccwsr_acquisition_cc_sptr acquisition_cc_;
gr::blocks::stream_to_vector::sptr stream_to_vector_;
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
unsigned int code_length_;
//unsigned int satellite_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int shift_resolution_;
unsigned int sampled_ms_;
unsigned int max_dwells_;
long fs_in_;
long if_;
bool dump_;
std::string dump_filename_;
std::complex<float> * code_data_;
std::complex<float> * code_pilot_;
Gnss_Synchro * gnss_synchro_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
boost::shared_ptr<gr::msg_queue> queue_;
concurrent_queue<int> *channel_internal_queue_;
float calculate_threshold(float pfa);
};
#endif /* GNSS_SDR_GALILEO_E1_PCPS_CCCWSR_AMBIGUOUS_ACQUISITION_H_ */

316
src/algorithms/acquisition/adapters/galileo_e1_pcps_tong_ambiguous_acquisition.cc Normal file
View File

@ -0,0 +1,316 @@
/*!
* \file galileo_e1_pcps_tong_ambiguous_acquisition.cc
* \brief Adapts a PCPS Tong acquisition block to an Acq1uisitionInterface for
* Galileo E1 Signals
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2011 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "galileo_e1_pcps_tong_ambiguous_acquisition.h"
#include "galileo_e1_signal_processing.h"
#include "Galileo_E1.h"
#include "configuration_interface.h"
#include <iostream>
#include <string>
#include <boost/lexical_cast.hpp>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <boost/math/distributions/exponential.hpp>
using google::LogMessage;
GalileoE1PcpsTongAmbiguousAcquisition::GalileoE1PcpsTongAmbiguousAcquisition(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams,
boost::shared_ptr<gr::msg_queue> queue) :
role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(queue)
{
configuration_ = configuration;
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "../data/acquisition.dat";
DLOG(INFO) << "role " << role;
item_type_ = configuration_->property(role + ".item_type",
default_item_type);
fs_in_ = configuration_->property("GNSS-SDR.internal_fs_hz", 4000000);
if_ = configuration_->property(role + ".ifreq", 0);
dump_ = configuration_->property(role + ".dump", false);
shift_resolution_ = configuration_->property(role + ".doppler_max", 15);
sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 4);
if (sampled_ms_ % 4 != 0)
{
sampled_ms_ = (int)(sampled_ms_/4) * 4;
LOG_AT_LEVEL(WARNING) << "coherent_integration_time should be multiple of "
<< "Galileo code length (4 ms). coherent_integration_time = "
<< sampled_ms_ << " ms will be used.";
}
tong_init_val_ = configuration->property(role + ".tong_init_val", 1);
tong_max_val_ = configuration->property(role + ".tong_max_val", 2);
dump_filename_ = configuration_->property(role + ".dump_filename",
default_dump_filename);
//--- Find number of samples per spreading code (4 ms) -----------------
code_length_ = round(
fs_in_
/ (Galileo_E1_CODE_CHIP_RATE_HZ
/ Galileo_E1_B_CODE_LENGTH_CHIPS));
vector_length_ = code_length_ * (int)(sampled_ms_/4);
int samples_per_ms = code_length_ / 4;
code_ = new gr_complex[vector_length_];
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
acquisition_cc_ = pcps_tong_make_acquisition_cc(sampled_ms_, shift_resolution_,
if_, fs_in_, samples_per_ms, code_length_, tong_init_val_,
tong_max_val_, queue_, dump_, dump_filename_);
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_);
DLOG(INFO) << "stream_to_vector("
<< stream_to_vector_->unique_id() << ")";
DLOG(INFO) << "acquisition(" << acquisition_cc_->unique_id()
<< ")";
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_
<< " unknown acquisition item type";
}
}
GalileoE1PcpsTongAmbiguousAcquisition::~GalileoE1PcpsTongAmbiguousAcquisition()
{
delete[] code_;
}
void
GalileoE1PcpsTongAmbiguousAcquisition::set_channel(unsigned int channel)
{
channel_ = channel;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel(channel_);
}
}
void
GalileoE1PcpsTongAmbiguousAcquisition::set_threshold(float threshold)
{
float pfa = configuration_->property(role_+ boost::lexical_cast<std::string>(channel_) + ".pfa", 0.0);
if(pfa==0.0) pfa = configuration_->property(role_+".pfa", 0.0);
if(pfa==0.0)
{
threshold_ = threshold;
}
else
{
threshold_ = calculate_threshold(pfa);
}
DLOG(INFO) <<"Channel "<<channel_<<" Threshold = " << threshold_;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_threshold(threshold_);
}
}
void
GalileoE1PcpsTongAmbiguousAcquisition::set_doppler_max(unsigned int doppler_max)
{
doppler_max_ = doppler_max;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_max(doppler_max_);
}
}
void
GalileoE1PcpsTongAmbiguousAcquisition::set_doppler_step(unsigned int doppler_step)
{
doppler_step_ = doppler_step;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_step(doppler_step_);
}
}
void
GalileoE1PcpsTongAmbiguousAcquisition::set_channel_queue(
concurrent_queue<int> *channel_internal_queue)
{
channel_internal_queue_ = channel_internal_queue;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel_queue(channel_internal_queue_);
}
}
void
GalileoE1PcpsTongAmbiguousAcquisition::set_gnss_synchro(
Gnss_Synchro* gnss_synchro)
{
gnss_synchro_ = gnss_synchro;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_gnss_synchro(gnss_synchro_);
}
}
signed int
GalileoE1PcpsTongAmbiguousAcquisition::mag()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->mag();
}
else
{
return 0;
}
}
void
GalileoE1PcpsTongAmbiguousAcquisition::init()
{
acquisition_cc_->init();
set_local_code();
}
void
GalileoE1PcpsTongAmbiguousAcquisition::set_local_code()
{
if (item_type_.compare("gr_complex") == 0)
{
bool cboc = configuration_->property(
"Acquisition" + boost::lexical_cast<std::string>(channel_)
+ ".cboc", false);
std::complex<float> * code = new std::complex<float>[code_length_];
galileo_e1_code_gen_complex_sampled(code, gnss_synchro_->Signal,
cboc, gnss_synchro_->PRN, fs_in_, 0, false);
for (unsigned int i = 0; i < sampled_ms_/4; i++)
{
memcpy(&(code_[i*code_length_]), code,
sizeof(gr_complex)*code_length_);
}
acquisition_cc_->set_local_code(code_);
delete[] code;
}
}
void
GalileoE1PcpsTongAmbiguousAcquisition::reset()
{
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_active(true);
}
}
float GalileoE1PcpsTongAmbiguousAcquisition::calculate_threshold(float pfa)
{
unsigned int frequency_bins = 0;
for (int doppler = (int)(-doppler_max_); doppler <= (int)doppler_max_; doppler += doppler_step_)
{
frequency_bins++;
}
DLOG(INFO) <<"Channel "<<channel_<<" Pfa = "<< pfa;
unsigned int ncells = vector_length_*frequency_bins;
double exponent = 1/(double)ncells;
double val = pow(1.0-pfa,exponent);
double lambda = double(vector_length_);
boost::math::exponential_distribution<double> mydist (lambda);
float threshold = (float)quantile(mydist,val);
return threshold;
}
void
GalileoE1PcpsTongAmbiguousAcquisition::connect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
void
GalileoE1PcpsTongAmbiguousAcquisition::disconnect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
gr::basic_block_sptr GalileoE1PcpsTongAmbiguousAcquisition::get_left_block()
{
return stream_to_vector_;
}
gr::basic_block_sptr GalileoE1PcpsTongAmbiguousAcquisition::get_right_block()
{
return acquisition_cc_;
}

161
src/algorithms/acquisition/adapters/galileo_e1_pcps_tong_ambiguous_acquisition.h Normal file
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@ -0,0 +1,161 @@
/*!
* \file galileo_e1_pcps_tong_ambiguous_acquisition.h
* \brief Adapts a PCPS Tong acquisition block to an AcquisitionInterface for
* Galileo E1 Signals
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_GALILEO_E1_PCPS_TONG_AMBIGUOUS_ACQUISITION_H_
#define GNSS_SDR_GALILEO_E1_PCPS_TONG_AMBIGUOUS_ACQUISITION_H_
#include "gnss_synchro.h"
#include "acquisition_interface.h"
#include "pcps_tong_acquisition_cc.h"
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/stream_to_vector.h>
class ConfigurationInterface;
/*!
* \brief Adapts a PCPS Tong acquisition block to an AcquisitionInterface
* for Galileo E1 Signals
*/
class GalileoE1PcpsTongAmbiguousAcquisition: public AcquisitionInterface
{
public:
GalileoE1PcpsTongAmbiguousAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams,
unsigned int out_streams, boost::shared_ptr<gr::msg_queue> queue);
virtual ~GalileoE1PcpsTongAmbiguousAcquisition();
std::string role()
{
return role_;
}
/*!
* \brief Returns "Galileo_E1_PCPS_Tong_Ambiguous_Acquisition"
*/
std::string implementation()
{
return "Galileo_E1_PCPS_Tong_Ambiguous_Acquisition";
}
size_t item_size()
{
return item_size_;
}
void connect(gr::top_block_sptr top_block);
void disconnect(gr::top_block_sptr top_block);
gr::basic_block_sptr get_left_block();
gr::basic_block_sptr get_right_block();
/*!
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
* to efficiently exchange synchronization data between acquisition and
* tracking blocks
*/
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro);
/*!
* \brief Set acquisition channel unique ID
*/
void set_channel(unsigned int channel);
/*!
* \brief Set statistics threshold of TONG algorithm
*/
void set_threshold(float threshold);
/*!
* \brief Set maximum Doppler off grid search
*/
void set_doppler_max(unsigned int doppler_max);
/*!
* \brief Set Doppler steps for the grid search
*/
void set_doppler_step(unsigned int doppler_step);
/*!
* \brief Set tracking channel internal queue
*/
void set_channel_queue(concurrent_queue<int> *channel_internal_queue);
/*!
* \brief Initializes acquisition algorithm.
*/
void init();
/*!
* \brief Sets local code for Galileo E1 TONG acquisition algorithm.
*/
void set_local_code();
/*!
* \brief Returns the maximum peak of grid search
*/
signed int mag();
/*!
* \brief Restart acquisition algorithm
*/
void reset();
private:
ConfigurationInterface* configuration_;
pcps_tong_acquisition_cc_sptr acquisition_cc_;
gr::blocks::stream_to_vector::sptr stream_to_vector_;
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
unsigned int code_length_;
bool bit_transition_flag_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int shift_resolution_;
unsigned int sampled_ms_;
unsigned int tong_init_val_;
unsigned int tong_max_val_;
long fs_in_;
long if_;
bool dump_;
std::string dump_filename_;
std::complex<float> * code_;
Gnss_Synchro * gnss_synchro_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
boost::shared_ptr<gr::msg_queue> queue_;
concurrent_queue<int> *channel_internal_queue_;
float calculate_threshold(float pfa);
};
#endif /* GNSS_SDR_GALILEO_E1_PCPS_TONG_AMBIGUOUS_ACQUISITION_H_ */

67
src/algorithms/acquisition/adapters/gps_l1_ca_pcps_acquisition.cc
View File

@ -1,10 +1,11 @@
/*!
* \file gps_l1_ca_pcps_acquisition.cc
* \brief Adapts a PCPS acquisition block to an AcquisitionInterface for
* GPS L1 C/A Signals
* GPS L1 C/A signals
* \authors <ul>
* <li> Javier Arribas, 2011. jarribas(at)cttc.es
* <li> Luis Esteve, 2012. luis(at)epsilon-formacion.com
* <li> Marc Molina, 2013. marc.molina.pena(at)gmail.com
* </ul>
*
* -------------------------------------------------------------------------
@ -57,33 +58,45 @@ GpsL1CaPcpsAcquisition::GpsL1CaPcpsAcquisition(
DLOG(INFO) << "role " << role;
// std::cout << "role " << role_ << std::endl;
item_type_ = configuration_->property(role + ".item_type",
default_item_type);
fs_in_ = configuration_->property("GNSS-SDR.internal_fs_hz", 2048000);
if_ = configuration_->property(role + ".ifreq", 0);
dump_ = configuration_->property(role + ".dump", false);
shift_resolution_ = configuration_->property(role + ".doppler_max", 10000);
sampled_ms_ = configuration_->property(role + ".sampled_ms", 1);
shift_resolution_ = configuration_->property(role + ".doppler_max", 15);
sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 1);
bit_transition_flag_ = configuration_->property(role + ".bit_transition_flag", false);
if (!bit_transition_flag_)
{
max_dwells_ = configuration_->property(role + ".max_dwells", 1);
}
else
{
max_dwells_ = 2;
}
dump_filename_ = configuration_->property(role + ".dump_filename",
default_dump_filename);
//--- Find number of samples per spreading code -------------------------
vector_length_ = round(fs_in_
code_length_ = round(fs_in_
/ (GPS_L1_CA_CODE_RATE_HZ / GPS_L1_CA_CODE_LENGTH_CHIPS));
code_= new gr_complex[vector_length_ * sampled_ms_];
vector_length_ = code_length_ * sampled_ms_;
code_= new gr_complex[vector_length_];
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
acquisition_cc_ = pcps_make_acquisition_cc(sampled_ms_,
shift_resolution_, if_, fs_in_, vector_length_, vector_length_, queue_,
dump_, dump_filename_);
acquisition_cc_ = pcps_make_acquisition_cc(sampled_ms_, max_dwells_,
shift_resolution_, if_, fs_in_, code_length_, code_length_,
bit_transition_flag_, queue_, dump_, dump_filename_);
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_*sampled_ms_);
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_);
DLOG(INFO) << "stream_to_vector(" << stream_to_vector_->unique_id()
<< ")";
@ -154,9 +167,9 @@ void GpsL1CaPcpsAcquisition::set_doppler_step(unsigned int doppler_step)
{
doppler_step_ = doppler_step;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_step(doppler_step_);
}
{
acquisition_cc_->set_doppler_step(doppler_step_);
}
}
@ -185,13 +198,13 @@ void GpsL1CaPcpsAcquisition::set_gnss_synchro(Gnss_Synchro* gnss_synchro)
signed int GpsL1CaPcpsAcquisition::mag()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->mag();
}
{
return acquisition_cc_->mag();
}
else
{
return 0;
}
{
return 0;
}
}
@ -201,24 +214,28 @@ void GpsL1CaPcpsAcquisition::init()
set_local_code();
}
void GpsL1CaPcpsAcquisition::set_local_code()
{
if (item_type_.compare("gr_complex") == 0)
{
std::complex<float>* code = new std::complex<float>[vector_length_];
std::complex<float>* code = new std::complex<float>[code_length_];
gps_l1_ca_code_gen_complex_sampled(code, gnss_synchro_->PRN, fs_in_, 0);
for (unsigned int i = 0; i < sampled_ms_; i++)
{
memcpy(&(code_[i*vector_length_]), code,
sizeof(gr_complex)*vector_length_);
memcpy(&(code_[i*code_length_]), code,
sizeof(gr_complex)*code_length_);
}
acquisition_cc_->set_local_code(code_);
delete[] code;
}
}
void GpsL1CaPcpsAcquisition::reset()
{
if (item_type_.compare("gr_complex") == 0)
@ -227,6 +244,7 @@ void GpsL1CaPcpsAcquisition::reset()
}
}
float GpsL1CaPcpsAcquisition::calculate_threshold(float pfa)
{
//Calculate the threshold
@ -243,12 +261,13 @@ float GpsL1CaPcpsAcquisition::calculate_threshold(float pfa)
double exponent = 1/(double)ncells;
double val = pow(1.0-pfa,exponent);
double lambda = double(vector_length_);
boost::math::exponential_distribution<double> mydist (lambda);
boost::math::exponential_distribution<double> mydist (lambda);
float threshold = (float)quantile(mydist,val);
return threshold;
}
void GpsL1CaPcpsAcquisition::connect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)

6
src/algorithms/acquisition/adapters/gps_l1_ca_pcps_acquisition.h
View File

@ -5,6 +5,7 @@
* \authors <ul>
* <li> Javier Arribas, 2011. jarribas(at)cttc.es
* <li> Luis Esteve, 2012. luis(at)epsilon-formacion.com
* <li> Marc Molina, 2013. marc.molina.pena(at)gmail.com
* </ul>
*
* -------------------------------------------------------------------------
@ -119,7 +120,6 @@ public:
/*!
* \brief Sets local code for GPS L1/CA PCPS acquisition algorithm.
*/
void set_local_code();
/*!
@ -139,13 +139,15 @@ private:
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
//unsigned int satellite_;
unsigned int code_length_;
bool bit_transition_flag_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int shift_resolution_;
unsigned int sampled_ms_;
unsigned int max_dwells_;
long fs_in_;
long if_;
bool dump_;

2
src/algorithms/acquisition/adapters/gps_l1_ca_pcps_acquisition_fine_doppler.cc
View File

@ -64,7 +64,7 @@ GpsL1CaPcpsAcquisitionFineDoppler::GpsL1CaPcpsAcquisitionFineDoppler(
dump_ = configuration->property(role + ".dump", false);
doppler_max_ = configuration->property(role + ".doppler_max", 5000);
doppler_min_ = configuration->property(role + ".doppler_min", -5000);
sampled_ms_ = configuration->property(role + ".sampled_ms", 1);
sampled_ms_ = configuration->property(role + ".coherent_integration_time_ms", 1);
max_dwells_= configuration->property(role + ".max_dwells", 1);
dump_filename_ = configuration->property(role + ".dump_filename",
default_dump_filename);

1
src/algorithms/acquisition/adapters/gps_l1_ca_pcps_acquisition_fine_doppler.h
View File

@ -132,7 +132,6 @@ private:
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
//unsigned int satellite_;
unsigned int channel_;
float threshold_;
int doppler_max_;

2
src/algorithms/acquisition/adapters/gps_l1_ca_pcps_assisted_acquisition.cc
View File

@ -63,7 +63,7 @@ GpsL1CaPcpsAssistedAcquisition::GpsL1CaPcpsAssistedAcquisition(
dump_ = configuration->property(role + ".dump", false);
doppler_max_ = configuration->property(role + ".doppler_max", 5000);
doppler_min_ = configuration->property(role + ".doppler_min", -5000);
sampled_ms_ = configuration->property(role + ".sampled_ms", 1);
sampled_ms_ = configuration->property(role + ".coherent_integration_time_ms", 1);
max_dwells_= configuration->property(role + ".max_dwells", 1);
dump_filename_ = configuration->property(role + ".dump_filename",
default_dump_filename);

296
src/algorithms/acquisition/adapters/gps_l1_ca_pcps_multithread_acquisition.cc Normal file
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@ -0,0 +1,296 @@
/*!
* \file gps_l1_ca_pcps_multithread_acquisition.cc
* \brief Adapts a multithread PCPS acquisition block to an
* AcquisitionInterface for GPS L1 C/A signals
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "gps_l1_ca_pcps_multithread_acquisition.h"
#include "gps_sdr_signal_processing.h"
#include "GPS_L1_CA.h"
#include "configuration_interface.h"
#include <iostream>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <stdexcept>
#include <boost/math/distributions/exponential.hpp>
#include <gnuradio/msg_queue.h>
using google::LogMessage;
GpsL1CaPcpsMultithreadAcquisition::GpsL1CaPcpsMultithreadAcquisition(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams,
gr::msg_queue::sptr queue) :
role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(queue)
{
configuration_ = configuration;
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "./data/acquisition.dat";
DLOG(INFO) << "role " << role;
item_type_ = configuration_->property(role + ".item_type",
default_item_type);
fs_in_ = configuration_->property("GNSS-SDR.internal_fs_hz", 2048000);
if_ = configuration_->property(role + ".ifreq", 0);
dump_ = configuration_->property(role + ".dump", false);
shift_resolution_ = configuration_->property(role + ".doppler_max", 15);
sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 1);
bit_transition_flag_ = configuration_->property("Acquisition.bit_transition_flag", false);
if (!bit_transition_flag_)
{
max_dwells_ = configuration_->property(role + ".max_dwells", 1);
}
else
{
max_dwells_ = 2;
}
dump_filename_ = configuration_->property(role + ".dump_filename",
default_dump_filename);
//--- Find number of samples per spreading code -------------------------
code_length_ = round(fs_in_
/ (GPS_L1_CA_CODE_RATE_HZ / GPS_L1_CA_CODE_LENGTH_CHIPS));
vector_length_ = code_length_ * sampled_ms_;
code_= new gr_complex[vector_length_];
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
acquisition_cc_ = pcps_make_multithread_acquisition_cc(sampled_ms_, max_dwells_,
shift_resolution_, if_, fs_in_, code_length_, code_length_,
bit_transition_flag_, queue_, dump_, dump_filename_);
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_);
DLOG(INFO) << "stream_to_vector(" << stream_to_vector_->unique_id()
<< ")";
DLOG(INFO) << "acquisition(" << acquisition_cc_->unique_id()
<< ")";
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_
<< " unknown acquisition item type";
}
}
GpsL1CaPcpsMultithreadAcquisition::~GpsL1CaPcpsMultithreadAcquisition()
{
delete[] code_;
}
void GpsL1CaPcpsMultithreadAcquisition::set_channel(unsigned int channel)
{
channel_ = channel;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel(channel_);
}
}
void GpsL1CaPcpsMultithreadAcquisition::set_threshold(float threshold)
{
float pfa = configuration_->property(role_ + boost::lexical_cast<std::string>(channel_) + ".pfa", 0.0);
if(pfa==0.0)
{
pfa = configuration_->property(role_+".pfa", 0.0);
}
if(pfa==0.0)
{
threshold_ = threshold;
}
else
{
threshold_ = calculate_threshold(pfa);
}
DLOG(INFO) <<"Channel "<<channel_<<" Threshold = " << threshold_;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_threshold(threshold_);
}
}
void GpsL1CaPcpsMultithreadAcquisition::set_doppler_max(unsigned int doppler_max)
{
doppler_max_ = doppler_max;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_max(doppler_max_);
}
}
void GpsL1CaPcpsMultithreadAcquisition::set_doppler_step(unsigned int doppler_step)
{
doppler_step_ = doppler_step;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_step(doppler_step_);
}
}
void GpsL1CaPcpsMultithreadAcquisition::set_channel_queue(
concurrent_queue<int> *channel_internal_queue)
{
channel_internal_queue_ = channel_internal_queue;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel_queue(channel_internal_queue_);
}
}
void GpsL1CaPcpsMultithreadAcquisition::set_gnss_synchro(Gnss_Synchro* gnss_synchro)
{
gnss_synchro_ = gnss_synchro;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_gnss_synchro(gnss_synchro_);
}
}
signed int GpsL1CaPcpsMultithreadAcquisition::mag()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->mag();
}
else
{
return 0;
}
}
void GpsL1CaPcpsMultithreadAcquisition::init()
{
acquisition_cc_->init();
set_local_code();
}
void GpsL1CaPcpsMultithreadAcquisition::set_local_code()
{
if (item_type_.compare("gr_complex") == 0)
{
std::complex<float>* code = new std::complex<float>[code_length_];
gps_l1_ca_code_gen_complex_sampled(code, gnss_synchro_->PRN, fs_in_, 0);
for (unsigned int i = 0; i < sampled_ms_; i++)
{
memcpy(&(code_[i*code_length_]), code,
sizeof(gr_complex)*code_length_);
}
acquisition_cc_->set_local_code(code_);
delete[] code;
}
}
void GpsL1CaPcpsMultithreadAcquisition::reset()
{
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_active(true);
}
}
float GpsL1CaPcpsMultithreadAcquisition::calculate_threshold(float pfa)
{
//Calculate the threshold
unsigned int frequency_bins = 0;
for (int doppler = (int)(-doppler_max_); doppler <= (int)doppler_max_; doppler += doppler_step_)
{
frequency_bins++;
}
DLOG(INFO) <<"Channel "<<channel_<<" Pfa = "<< pfa;
unsigned int ncells = vector_length_*frequency_bins;
double exponent = 1/(double)ncells;
double val = pow(1.0-pfa,exponent);
double lambda = double(vector_length_);
boost::math::exponential_distribution<double> mydist (lambda);
float threshold = (float)quantile(mydist,val);
return threshold;
}
void GpsL1CaPcpsMultithreadAcquisition::connect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
void GpsL1CaPcpsMultithreadAcquisition::disconnect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
gr::basic_block_sptr GpsL1CaPcpsMultithreadAcquisition::get_left_block()
{
return stream_to_vector_;
}
gr::basic_block_sptr GpsL1CaPcpsMultithreadAcquisition::get_right_block()
{
return acquisition_cc_;
}

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/*!
* \file gps_l1_ca_pcps_multithread_acquisition.h
* \brief Adapts a multithread PCPS acquisition block to an
* AcquisitionInterface for GPS L1 C/A signals
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_GPS_L1_CA_PCPS_MULTITHREAD_CQUISITION_H_
#define GNSS_SDR_GPS_L1_CA_PCPS_MULTITHREAD_CQUISITION_H_
#include "gnss_synchro.h"
#include "acquisition_interface.h"
#include "pcps_multithread_acquisition_cc.h"
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/stream_to_vector.h>
class ConfigurationInterface;
/*!
* \brief This class adapts a multithread PCPS acquisition block to an
* AcquisitionInterface for GPS L1 C/A signals
*/
class GpsL1CaPcpsMultithreadAcquisition: public AcquisitionInterface
{
public:
GpsL1CaPcpsMultithreadAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams,
unsigned int out_streams, boost::shared_ptr<gr::msg_queue> queue);
virtual ~GpsL1CaPcpsMultithreadAcquisition();
std::string role()
{
return role_;
}
/*!
* \brief Returns "GPS_L1_CA_PCPS_Multithread_Acquisition"
*/
std::string implementation()
{
return "GPS_L1_CA_PCPS_Multithread_Acquisition";
}
size_t item_size()
{
return item_size_;
}
void connect(gr::top_block_sptr top_block);
void disconnect(gr::top_block_sptr top_block);
gr::basic_block_sptr get_left_block();
gr::basic_block_sptr get_right_block();
/*!
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
* to efficiently exchange synchronization data between acquisition and
* tracking blocks
*/
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro);
/*!
* \brief Set acquisition channel unique ID
*/
void set_channel(unsigned int channel);
/*!
* \brief Set statistics threshold of PCPS algorithm
*/
void set_threshold(float threshold);
/*!
* \brief Set maximum Doppler off grid search
*/
void set_doppler_max(unsigned int doppler_max);
/*!
* \brief Set Doppler steps for the grid search
*/
void set_doppler_step(unsigned int doppler_step);
/*!
* \brief Set tracking channel internal queue
*/
void set_channel_queue(concurrent_queue<int> *channel_internal_queue);
/*!
* \brief Initializes acquisition algorithm.
*/
void init();
/*!
* \brief Sets local code for GPS L1/CA PCPS acquisition algorithm.
*/
void set_local_code();
/*!
* \brief Returns the maximum peak of grid search
*/
signed int mag();
/*!
* \brief Restart acquisition algorithm
*/
void reset();
private:
ConfigurationInterface* configuration_;
pcps_multithread_acquisition_cc_sptr acquisition_cc_;
gr::blocks::stream_to_vector::sptr stream_to_vector_;
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
unsigned int code_length_;
bool bit_transition_flag_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int shift_resolution_;
unsigned int sampled_ms_;
unsigned int max_dwells_;
long fs_in_;
long if_;
bool dump_;
std::string dump_filename_;
std::complex<float> * code_;
Gnss_Synchro * gnss_synchro_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
boost::shared_ptr<gr::msg_queue> queue_;
concurrent_queue<int> *channel_internal_queue_;
float calculate_threshold(float pfa);
};
#endif /* GNSS_SDR_GPS_L1_CA_PCPS_MULTITHREAD_CQUISITION_H_ */

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/*!
* \file gps_l1_ca_pcps_tong_acquisition.cc
* \brief Adapts a PCPS Tong acquisition block to an AcquisitionInterface for
* GPS L1 C/A signals
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "gps_l1_ca_pcps_tong_acquisition.h"
#include "gps_sdr_signal_processing.h"
#include "GPS_L1_CA.h"
#include "configuration_interface.h"
#include <iostream>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <stdexcept>
#include <boost/math/distributions/exponential.hpp>
#include <gnuradio/msg_queue.h>
using google::LogMessage;
GpsL1CaPcpsTongAcquisition::GpsL1CaPcpsTongAcquisition(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams,
gr::msg_queue::sptr queue) :
role_(role), in_streams_(in_streams), out_streams_(out_streams), queue_(queue)
{
configuration_ = configuration;
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "./data/acquisition.dat";
DLOG(INFO) << "role " << role;
item_type_ = configuration_->property(role + ".item_type",
default_item_type);
fs_in_ = configuration_->property("GNSS-SDR.internal_fs_hz", 2048000);
if_ = configuration_->property(role + ".ifreq", 0);
dump_ = configuration_->property(role + ".dump", false);
shift_resolution_ = configuration_->property(role + ".doppler_max", 15);
sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 1);
tong_init_val_ = configuration->property(role + ".tong_init_val", 1);
tong_max_val_ = configuration->property(role + ".tong_max_val", 2);
dump_filename_ = configuration_->property(role + ".dump_filename",
default_dump_filename);
//--- Find number of samples per spreading code -------------------------
code_length_ = round(fs_in_
/ (GPS_L1_CA_CODE_RATE_HZ / GPS_L1_CA_CODE_LENGTH_CHIPS));
vector_length_ = code_length_ * sampled_ms_;
code_= new gr_complex[vector_length_];
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
acquisition_cc_ = pcps_tong_make_acquisition_cc(sampled_ms_, shift_resolution_, if_, fs_in_,
code_length_, code_length_, tong_init_val_, tong_max_val_,
queue_, dump_, dump_filename_);
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_);
DLOG(INFO) << "stream_to_vector(" << stream_to_vector_->unique_id()
<< ")";
DLOG(INFO) << "acquisition(" << acquisition_cc_->unique_id()
<< ")";
}
else
{
LOG_AT_LEVEL(WARNING) << item_type_
<< " unknown acquisition item type";
}
}
GpsL1CaPcpsTongAcquisition::~GpsL1CaPcpsTongAcquisition()
{
delete[] code_;
}
void GpsL1CaPcpsTongAcquisition::set_channel(unsigned int channel)
{
channel_ = channel;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel(channel_);
}
}
void GpsL1CaPcpsTongAcquisition::set_threshold(float threshold)
{
float pfa = configuration_->property(role_ + boost::lexical_cast<std::string>(channel_) + ".pfa", 0.0);
if(pfa==0.0)
{
pfa = configuration_->property(role_+".pfa", 0.0);
}
if(pfa==0.0)
{
threshold_ = threshold;
}
else
{
threshold_ = calculate_threshold(pfa);
}
DLOG(INFO) <<"Channel "<<channel_<<" Threshold = " << threshold_;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_threshold(threshold_);
}
}
void GpsL1CaPcpsTongAcquisition::set_doppler_max(unsigned int doppler_max)
{
doppler_max_ = doppler_max;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_max(doppler_max_);
}
}
void GpsL1CaPcpsTongAcquisition::set_doppler_step(unsigned int doppler_step)
{
doppler_step_ = doppler_step;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_doppler_step(doppler_step_);
}
}
void GpsL1CaPcpsTongAcquisition::set_channel_queue(
concurrent_queue<int> *channel_internal_queue)
{
channel_internal_queue_ = channel_internal_queue;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_channel_queue(channel_internal_queue_);
}
}
void GpsL1CaPcpsTongAcquisition::set_gnss_synchro(Gnss_Synchro* gnss_synchro)
{
gnss_synchro_ = gnss_synchro;
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_gnss_synchro(gnss_synchro_);
}
}
signed int GpsL1CaPcpsTongAcquisition::mag()
{
if (item_type_.compare("gr_complex") == 0)
{
return acquisition_cc_->mag();
}
else
{
return 0;
}
}
void GpsL1CaPcpsTongAcquisition::init()
{
acquisition_cc_->init();
set_local_code();
}
void GpsL1CaPcpsTongAcquisition::set_local_code()
{
if (item_type_.compare("gr_complex") == 0)
{
std::complex<float>* code = new std::complex<float>[code_length_];
gps_l1_ca_code_gen_complex_sampled(code, gnss_synchro_->PRN, fs_in_, 0);
for (unsigned int i = 0; i < sampled_ms_; i++)
{
memcpy(&(code_[i*code_length_]), code,
sizeof(gr_complex)*code_length_);
}
acquisition_cc_->set_local_code(code_);
delete[] code;
}
}
void GpsL1CaPcpsTongAcquisition::reset()
{
if (item_type_.compare("gr_complex") == 0)
{
acquisition_cc_->set_active(true);
}
}
float GpsL1CaPcpsTongAcquisition::calculate_threshold(float pfa)
{
//Calculate the threshold
unsigned int frequency_bins = 0;
for (int doppler = (int)(-doppler_max_); doppler <= (int)doppler_max_; doppler += doppler_step_)
{
frequency_bins++;
}
DLOG(INFO) <<"Channel "<<channel_<<" Pfa = "<< pfa;
unsigned int ncells = vector_length_*frequency_bins;
double exponent = 1/(double)ncells;
double val = pow(1.0-pfa,exponent);
double lambda = double(vector_length_);
boost::math::exponential_distribution<double> mydist (lambda);
float threshold = (float)quantile(mydist,val);
return threshold;
}
void GpsL1CaPcpsTongAcquisition::connect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
void GpsL1CaPcpsTongAcquisition::disconnect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_cc_, 0);
}
}
gr::basic_block_sptr GpsL1CaPcpsTongAcquisition::get_left_block()
{
return stream_to_vector_;
}
gr::basic_block_sptr GpsL1CaPcpsTongAcquisition::get_right_block()
{
return acquisition_cc_;
}

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/*!
* \file gps_l1_ca_pcps_tong_acquisition.h
* \brief Adapts a PCPS Tong acquisition block to an AcquisitionInterface for
* GPS L1 C/A signals
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_GPS_L1_CA_TONG_ACQUISITION_H_
#define GNSS_SDR_GPS_L1_CA_TONG_ACQUISITION_H_
#include "gnss_synchro.h"
#include "acquisition_interface.h"
#include "pcps_tong_acquisition_cc.h"
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/stream_to_vector.h>
class ConfigurationInterface;
/*!
* \brief This class adapts a PCPS Tong acquisition block to an
* AcquisitionInterface for GPS L1 C/A signals
*/
class GpsL1CaPcpsTongAcquisition: public AcquisitionInterface
{
public:
GpsL1CaPcpsTongAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams,
unsigned int out_streams, boost::shared_ptr<gr::msg_queue> queue);
virtual ~GpsL1CaPcpsTongAcquisition();
std::string role()
{
return role_;
}
/*!
* \brief Returns "GPS_L1_CA_PCPS_Tong_Acquisition"
*/
std::string implementation()
{
return "GPS_L1_CA_PCPS_Tong_Acquisition";
}
size_t item_size()
{
return item_size_;
}
void connect(gr::top_block_sptr top_block);
void disconnect(gr::top_block_sptr top_block);
gr::basic_block_sptr get_left_block();
gr::basic_block_sptr get_right_block();
/*!
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
* to efficiently exchange synchronization data between acquisition and
* tracking blocks
*/
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro);
/*!
* \brief Set acquisition channel unique ID
*/
void set_channel(unsigned int channel);
/*!
* \brief Set statistics threshold of TONG algorithm
*/
void set_threshold(float threshold);
/*! bit_transition_flag_ = configuration_->property("Acquisition.bit_transition_flag", false);
* \brief Set maximum Doppler off grid search
*/
void set_doppler_max(unsigned int doppler_max);
/*!
* \brief Set Doppler steps for the grid search
*/
void set_doppler_step(unsigned int doppler_step);
/*!
* \brief Set tracking channel internal queue
*/
void set_channel_queue(concurrent_queue<int> *channel_internal_queue);
/*!
* \brief Initializes acquisition algorithm.
*/
void init();
/*!
* \brief Sets local code for GPS L1/CA TONG acquisition algorithm.
*/
void set_local_code();
/*!
* \brief Returns the maximum peak of grid search
*/
signed int mag();
/*!
* \brief Restart acquisition algorithm
*/// std::cout << "role " << role_ << std::endl;
void reset();
private:
ConfigurationInterface* configuration_;
pcps_tong_acquisition_cc_sptr acquisition_cc_;
gr::blocks::stream_to_vector::sptr stream_to_vector_;
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
unsigned int code_length_;
bool bit_transition_flag_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int shift_resolution_;
unsigned int sampled_ms_;
unsigned int tong_init_val_;
unsigned int tong_max_val_;
long fs_in_;
long if_;
bool dump_;
std::string dump_filename_;
std::complex<float> * code_;
Gnss_Synchro * gnss_synchro_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
boost::shared_ptr<gr::msg_queue> queue_;
concurrent_queue<int> *channel_internal_queue_;
float calculate_threshold(float pfa);
};
#endif /* GNSS_SDR_GPS_L1_CA_TONG_ACQUISITION_H_ */

6
src/algorithms/acquisition/gnuradio_blocks/CMakeLists.txt
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@ -17,9 +17,13 @@
#
set(ACQ_GR_BLOCKS_SOURCES
pcps_acquisition_cc.cc
pcps_acquisition_cc.cc
pcps_multithread_acquisition_cc.cc
pcps_assisted_acquisition_cc.cc
pcps_acquisition_fine_doppler_cc.cc
pcps_tong_acquisition_cc.cc
pcps_cccwsr_acquisition_cc.cc
galileo_pcps_8ms_acquisition_cc.cc
)
include_directories(

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/*!
* \file galileo_pcps_8ms_acquisition_cc.cc
* \brief This class implements a Parallel Code Phase Search Acquisition for
* Galileo E1 signals with coherent integration time = 8 ms (two codes)
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "galileo_pcps_8ms_acquisition_cc.h"
#include "gnss_signal_processing.h"
#include "control_message_factory.h"
#include <gnuradio/io_signature.h>
#include <sstream>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <volk/volk.h>
using google::LogMessage;
galileo_pcps_8ms_acquisition_cc_sptr galileo_pcps_8ms_make_acquisition_cc(
unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename)
{
return galileo_pcps_8ms_acquisition_cc_sptr(
new galileo_pcps_8ms_acquisition_cc(sampled_ms, max_dwells, doppler_max, freq, fs_in, samples_per_ms,
samples_per_code, queue, dump, dump_filename));
}
galileo_pcps_8ms_acquisition_cc::galileo_pcps_8ms_acquisition_cc(
unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename) :
gr::block("galileo_pcps_8ms_acquisition_cc",
gr::io_signature::make(1, 1, sizeof(gr_complex) * sampled_ms * samples_per_ms),
gr::io_signature::make(0, 0, sizeof(gr_complex) * sampled_ms * samples_per_ms))
{
d_sample_counter = 0; // SAMPLE COUNTER
d_active = false;
d_state = 0;
d_queue = queue;
d_freq = freq;
d_fs_in = fs_in;
d_samples_per_ms = samples_per_ms;
d_samples_per_code = samples_per_code;
d_sampled_ms = sampled_ms;
d_max_dwells = max_dwells;
d_well_count = 0;
d_doppler_max = doppler_max;
d_fft_size = d_sampled_ms * d_samples_per_ms;
d_mag = 0;
d_input_power = 0.0;
d_num_doppler_bins = 0;
//todo: do something if posix_memalign fails
if (posix_memalign((void**)&d_fft_code_A, 16, d_fft_size * sizeof(gr_complex)) == 0){};
if (posix_memalign((void**)&d_fft_code_B, 16, d_fft_size * sizeof(gr_complex)) == 0){};
if (posix_memalign((void**)&d_magnitude, 16, d_fft_size * sizeof(gr_complex)) == 0){};
// Direct FFT
d_fft_if = new gr::fft::fft_complex(d_fft_size, true);
// Inverse FFT
d_ifft = new gr::fft::fft_complex(d_fft_size, false);
// For dumping samples into a file
d_dump = dump;
d_dump_filename = dump_filename;
}
galileo_pcps_8ms_acquisition_cc::~galileo_pcps_8ms_acquisition_cc()
{
for (unsigned int doppler_index = 0; doppler_index < d_num_doppler_bins; doppler_index++)
{
free(d_grid_doppler_wipeoffs[doppler_index]);
}
if (d_num_doppler_bins > 0)
{
delete[] d_grid_doppler_wipeoffs;
}
free(d_fft_code_A);
free(d_fft_code_B);
free(d_magnitude);
delete d_ifft;
delete d_fft_if;
if (d_dump)
{
d_dump_file.close();
}
}
void galileo_pcps_8ms_acquisition_cc::set_local_code(std::complex<float> * code)
{
memcpy(d_fft_if->get_inbuf(), code, sizeof(gr_complex)*d_fft_size);
d_fft_if->execute(); // We need the FFT of local code
//Conjugate the local code
if (is_unaligned())
{
volk_32fc_conjugate_32fc_u(d_fft_code_A,d_fft_if->get_outbuf(),d_fft_size);
}
else
{
volk_32fc_conjugate_32fc_a(d_fft_code_A,d_fft_if->get_outbuf(),d_fft_size);
}
volk_32fc_s32fc_multiply_32fc_a(&(d_fft_if->get_inbuf())[d_samples_per_code],
&code[d_samples_per_code], gr_complex(-1,0),
d_samples_per_code);
d_fft_if->execute(); // We need the FFT of local code
//Conjugate the local code
if (is_unaligned())
{
volk_32fc_conjugate_32fc_u(d_fft_code_B,d_fft_if->get_outbuf(),d_fft_size);
}
else
{
volk_32fc_conjugate_32fc_a(d_fft_code_B,d_fft_if->get_outbuf(),d_fft_size);
}
}
void galileo_pcps_8ms_acquisition_cc::init()
{
d_gnss_synchro->Acq_delay_samples = 0.0;
d_gnss_synchro->Acq_doppler_hz = 0.0;
d_gnss_synchro->Acq_samplestamp_samples = 0;
d_mag = 0.0;
d_input_power = 0.0;
// Create the carrier Doppler wipeoff signals
d_num_doppler_bins = 0;//floor(2*std::abs((int)d_doppler_max)/d_doppler_step);
for (int doppler = (int)(-d_doppler_max); doppler <= (int)d_doppler_max; doppler += d_doppler_step)
{
d_num_doppler_bins++;
}
d_grid_doppler_wipeoffs = new gr_complex*[d_num_doppler_bins];
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
if (posix_memalign((void**)&(d_grid_doppler_wipeoffs[doppler_index]), 16,
d_fft_size * sizeof(gr_complex)) == 0){};
int doppler=-(int)d_doppler_max+d_doppler_step*doppler_index;
complex_exp_gen_conj(d_grid_doppler_wipeoffs[doppler_index],
d_freq + doppler, d_fs_in, d_fft_size);
}
}
int galileo_pcps_8ms_acquisition_cc::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
switch (d_state)
{
case 0:
{
if (d_active)
{
//restart acquisition variables
d_gnss_synchro->Acq_delay_samples = 0.0;
d_gnss_synchro->Acq_doppler_hz = 0.0;
d_gnss_synchro->Acq_samplestamp_samples = 0;
d_well_count = 0;
d_mag = 0.0;
d_input_power = 0.0;
d_test_statistics = 0.0;
d_state = 1;
}
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
break;
}
case 1:
{
// initialize acquisition algorithm
int doppler;
unsigned int indext = 0;
unsigned int indext_A = 0;
unsigned int indext_B = 0;
float magt = 0.0;
float magt_A = 0.0;
float magt_B = 0.0;
const gr_complex *in = (const gr_complex *)input_items[0]; //Get the input samples pointer
float fft_normalization_factor = (float)d_fft_size * (float)d_fft_size;
d_input_power = 0.0;
d_mag = 0.0;
d_sample_counter += d_fft_size; // sample counter
d_well_count++;
DLOG(INFO) << "Channel: " << d_channel
<< " , doing acquisition of satellite: " << d_gnss_synchro->System << " "<< d_gnss_synchro->PRN
<< " ,sample stamp: " << d_sample_counter << ", threshold: "
<< d_threshold << ", doppler_max: " << d_doppler_max
<< ", doppler_step: " << d_doppler_step;
// 1- Compute the input signal power estimation
volk_32fc_magnitude_squared_32f_a(d_magnitude, in, d_fft_size);
volk_32f_accumulator_s32f_a(&d_input_power, d_magnitude, d_fft_size);
d_input_power /= (float)d_fft_size;
// 2- Doppler frequency search loop
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
// doppler search steps
doppler=-(int)d_doppler_max+d_doppler_step*doppler_index;
volk_32fc_x2_multiply_32fc_a(d_fft_if->get_inbuf(), in,
d_grid_doppler_wipeoffs[doppler_index], d_fft_size);
// 3- Perform the FFT-based convolution (parallel time search)
// Compute the FFT of the carrier wiped--off incoming signal
d_fft_if->execute();
// Multiply carrier wiped--off, Fourier transformed incoming signal
// with the local FFT'd code reference using SIMD operations with VOLK library
volk_32fc_x2_multiply_32fc_a(d_ifft->get_inbuf(),
d_fft_if->get_outbuf(), d_fft_code_A, d_fft_size);
// compute the inverse FFT
d_ifft->execute();
// Search maximum
volk_32fc_magnitude_squared_32f_a(d_magnitude, d_ifft->get_outbuf(), d_fft_size);
volk_32f_index_max_16u_a(&indext_A, d_magnitude, d_fft_size);
// Normalize the maximum value to correct the scale factor introduced by FFTW
magt_A = d_magnitude[indext_A] / (fft_normalization_factor * fft_normalization_factor);
// Multiply carrier wiped--off, Fourier transformed incoming signal
// with the local FFT'd code reference using SIMD operations with VOLK library
volk_32fc_x2_multiply_32fc_a(d_ifft->get_inbuf(),
d_fft_if->get_outbuf(), d_fft_code_B, d_fft_size);
// compute the inverse FFT
d_ifft->execute();
// Search maximum
volk_32fc_magnitude_squared_32f_a(d_magnitude, d_ifft->get_outbuf(), d_fft_size);
volk_32f_index_max_16u_a(&indext_B, d_magnitude, d_fft_size);
// Normalize the maximum value to correct the scale factor introduced by FFTW
magt_B = d_magnitude[indext_B] / (fft_normalization_factor * fft_normalization_factor);
if (magt_A >= magt_B)
{
magt = magt_A;
indext = indext_A;
}
else
{
magt = magt_B;
indext = indext_B;
}
// 4- record the maximum peak and the associated synchronization parameters
if (d_mag < magt)
{
d_mag = magt;
d_gnss_synchro->Acq_delay_samples = (double)(indext % d_samples_per_code);
d_gnss_synchro->Acq_doppler_hz = (double)doppler;
d_gnss_synchro->Acq_samplestamp_samples = d_sample_counter;
}
// Record results to file if required
if (d_dump)
{
std::stringstream filename;
std::streamsize n = 2 * sizeof(float) * (d_fft_size); // complex file write
filename.str("");
filename << "../data/test_statistics_" << d_gnss_synchro->System
<<"_" << d_gnss_synchro->Signal << "_sat_"
<< d_gnss_synchro->PRN << "_doppler_" << doppler << ".dat";
d_dump_file.open(filename.str().c_str(), std::ios::out | std::ios::binary);
d_dump_file.write((char*)d_ifft->get_outbuf(), n); //write directly |abs(x)|^2 in this Doppler bin?
d_dump_file.close();
}
}
// 5- Compute the test statistics and compare to the threshold
//d_test_statistics = 2 * d_fft_size * d_mag / d_input_power;
d_test_statistics = d_mag / d_input_power;
if (d_test_statistics > d_threshold)
{
d_state = 2; // Positive acquisition
}
else
{
if (d_well_count == d_max_dwells)
{
d_state = 3; // Negative acquisition
}
}
consume_each(1);
break;
}
case 2:
{
// 6.1- Declare positive acquisition using a message queue
DLOG(INFO) << "positive acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
d_active = false;
d_state = 0;
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
acquisition_message = 1;
d_channel_internal_queue->push(acquisition_message);
break;
}
case 3:
{
// 6.2- Declare negative acquisition using a message queue
DLOG(INFO) << "negative acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
d_active = false;
d_state = 0;
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
acquisition_message = 2;
d_channel_internal_queue->push(acquisition_message);
break;
}
}
return 0;
}

218
src/algorithms/acquisition/gnuradio_blocks/galileo_pcps_8ms_acquisition_cc.h Normal file
View File

@ -0,0 +1,218 @@
/*!
* \file galileo_pcps_8ms_acquisition_cc.h
* \brief This class implements a Parallel Code Phase Search Acquisition for
* Galileo E1 signals with coherent integration time = 8 ms (two codes)
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_PCPS_8MS_ACQUISITION_CC_H_
#define GNSS_SDR_PCPS_8MS_ACQUISITION_CC_H_
#include <fstream>
#include <gnuradio/block.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/gr_complex.h>
#include <gnuradio/fft/fft.h>
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
#include "gnss_synchro.h"
class galileo_pcps_8ms_acquisition_cc;
typedef boost::shared_ptr<galileo_pcps_8ms_acquisition_cc> galileo_pcps_8ms_acquisition_cc_sptr;
galileo_pcps_8ms_acquisition_cc_sptr
galileo_pcps_8ms_make_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
/*!
* \brief This class implements a Parallel Code Phase Search Acquisition for
* Galileo E1 signals with coherent integration time = 8 ms (two codes)
*/
class galileo_pcps_8ms_acquisition_cc: public gr::block
{
private:
friend galileo_pcps_8ms_acquisition_cc_sptr
galileo_pcps_8ms_make_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
galileo_pcps_8ms_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
void calculate_magnitudes(gr_complex* fft_begin, int doppler_shift,
int doppler_offset);
long d_fs_in;
long d_freq;
int d_samples_per_ms;
int d_samples_per_code;
unsigned int d_doppler_resolution;
float d_threshold;
std::string d_satellite_str;
unsigned int d_doppler_max;
unsigned int d_doppler_step;
unsigned int d_sampled_ms;
unsigned int d_max_dwells;
unsigned int d_well_count;
unsigned int d_fft_size;
unsigned long int d_sample_counter;
gr_complex** d_grid_doppler_wipeoffs;
unsigned int d_num_doppler_bins;
gr_complex* d_fft_code_A;
gr_complex* d_fft_code_B;
gr::fft::fft_complex* d_fft_if;
gr::fft::fft_complex* d_ifft;
Gnss_Synchro *d_gnss_synchro;
unsigned int d_code_phase;
float d_doppler_freq;
float d_mag;
float* d_magnitude;
float d_input_power;
float d_test_statistics;
gr::msg_queue::sptr d_queue;
concurrent_queue<int> *d_channel_internal_queue;
std::ofstream d_dump_file;
bool d_active;
int d_state;
bool d_dump;
unsigned int d_channel;
std::string d_dump_filename;
public:
/*!
* \brief Default destructor.
*/
~galileo_pcps_8ms_acquisition_cc();
/*!
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
* to exchange synchronization data between acquisition and tracking blocks.
* \param p_gnss_synchro Satellite information shared by the processing blocks.
*/
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro)
{
d_gnss_synchro = p_gnss_synchro;
}
/*!
* \brief Returns the maximum peak of grid search.
*/
unsigned int mag()
{
return d_mag;
}
/*!
* \brief Initializes acquisition algorithm.
*/
void init();
/*!
* \brief Sets local code for PCPS acquisition algorithm.
* \param code - Pointer to the PRN code.
*/
void set_local_code(std::complex<float> * code);
/*!
* \brief Starts acquisition algorithm, turning from standby mode to
* active mode
* \param active - bool that activates/deactivates the block.
*/
void set_active(bool active)
{
d_active = active;
}
/*!
* \brief Set acquisition channel unique ID
* \param channel - receiver channel.
*/
void set_channel(unsigned int channel)
{
d_channel = channel;
}
/*!
* \brief Set statistics threshold of PCPS algorithm.
* \param threshold - Threshold for signal detection (check \ref Navitec2012,
* Algorithm 1, for a definition of this threshold).
*/
void set_threshold(float threshold)
{
d_threshold = threshold;
}
/*!
* \brief Set maximum Doppler grid search
* \param doppler_max - Maximum Doppler shift considered in the grid search [Hz].
*/
void set_doppler_max(unsigned int doppler_max)
{
d_doppler_max = doppler_max;
}
/*!
* \brief Set Doppler steps for the grid search
* \param doppler_step - Frequency bin of the search grid [Hz].
*/
void set_doppler_step(unsigned int doppler_step)
{
d_doppler_step = doppler_step;
}
/*!
* \brief Set tracking channel internal queue.
* \param channel_internal_queue - Channel's internal blocks information queue.
*/
void set_channel_queue(concurrent_queue<int> *channel_internal_queue)
{
d_channel_internal_queue = channel_internal_queue;
}
/*!
* \brief Parallel Code Phase Search Acquisition signal processing.
*/
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* GNSS_SDR_PCPS_8MS_ACQUISITION_CC_H_*/

277
src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_cc.cc
View File

@ -44,39 +44,48 @@
using google::LogMessage;
pcps_acquisition_cc_sptr pcps_make_acquisition_cc(
unsigned int sampled_ms, unsigned int doppler_max,
long freq, long fs_in, int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump, std::string dump_filename)
unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
bool bit_transition_flag,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename)
{
return pcps_acquisition_cc_sptr(
new pcps_acquisition_cc(sampled_ms, doppler_max, freq, fs_in,
samples_per_ms, samples_per_code, queue, dump, dump_filename));
new pcps_acquisition_cc(sampled_ms, max_dwells, doppler_max, freq, fs_in, samples_per_ms,
samples_per_code, bit_transition_flag, queue, dump, dump_filename));
}
pcps_acquisition_cc::pcps_acquisition_cc(
unsigned int sampled_ms, unsigned int doppler_max,
long freq, long fs_in, int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump, std::string dump_filename) :
unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
bool bit_transition_flag,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename) :
gr::block("pcps_acquisition_cc",
gr::io_signature::make(1, 1, sizeof(gr_complex) * sampled_ms * samples_per_ms),
gr::io_signature::make(0, 0, sizeof(gr_complex) * sampled_ms * samples_per_ms))
{
d_sample_counter = 0; // SAMPLE COUNTER
d_active = false;
d_state = 0;
d_queue = queue;
d_freq = freq;
d_fs_in = fs_in;
d_samples_per_ms = samples_per_ms;
d_samples_per_code = samples_per_code;
d_sampled_ms = sampled_ms;
d_max_dwells = max_dwells;
d_well_count = 0;
d_doppler_max = doppler_max;
d_fft_size = d_sampled_ms * d_samples_per_ms;
d_mag = 0;
d_input_power = 0.0;
d_num_doppler_bins = 0;
d_bit_transition_flag = bit_transition_flag;
//todo: do something if posix_memalign fails
if (posix_memalign((void**)&d_fft_codes, 16, d_fft_size * sizeof(gr_complex)) == 0){};
@ -94,11 +103,9 @@ pcps_acquisition_cc::pcps_acquisition_cc(
}
pcps_acquisition_cc::~pcps_acquisition_cc()
{
for (unsigned int doppler_index = 0; doppler_index < d_num_doppler_bins; doppler_index++)
{
free(d_grid_doppler_wipeoffs[doppler_index]);
@ -115,6 +122,7 @@ pcps_acquisition_cc::~pcps_acquisition_cc()
delete d_ifft;
delete d_fft_if;
if (d_dump)
{
d_dump_file.close();
@ -122,7 +130,6 @@ pcps_acquisition_cc::~pcps_acquisition_cc()
}
void pcps_acquisition_cc::set_local_code(std::complex<float> * code)
{
memcpy(d_fft_if->get_inbuf(), code, sizeof(gr_complex)*d_fft_size);
@ -141,7 +148,6 @@ void pcps_acquisition_cc::set_local_code(std::complex<float> * code)
}
void pcps_acquisition_cc::init()
{
d_gnss_synchro->Acq_delay_samples = 0.0;
@ -151,7 +157,11 @@ void pcps_acquisition_cc::init()
d_input_power = 0.0;
// Create the carrier Doppler wipeoff signals
d_num_doppler_bins=floor(2*std::abs((int)d_doppler_max)/d_doppler_step);
d_num_doppler_bins = 0;//floor(2*std::abs((int)d_doppler_max)/d_doppler_step);
for (int doppler = (int)(-d_doppler_max); doppler <= (int)d_doppler_max; doppler += d_doppler_step)
{
d_num_doppler_bins++;
}
d_grid_doppler_wipeoffs = new gr_complex*[d_num_doppler_bins];
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
@ -165,7 +175,6 @@ void pcps_acquisition_cc::init()
}
int pcps_acquisition_cc::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
@ -181,31 +190,46 @@ int pcps_acquisition_cc::general_work(int noutput_items,
* 6. Declare positive or negative acquisition using a message queue
*/
if (!d_active)
int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
switch (d_state)
{
case 0:
{
d_sample_counter += d_fft_size * noutput_items; // sample counter
consume_each(noutput_items);
if (d_active)
{
//restart acquisition variables
d_gnss_synchro->Acq_delay_samples = 0.0;
d_gnss_synchro->Acq_doppler_hz = 0.0;
d_gnss_synchro->Acq_samplestamp_samples = 0;
d_well_count = 0;
d_mag = 0.0;
d_input_power = 0.0;
d_test_statistics = 0.0;
d_state = 1;
}
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
break;
}
else
case 1:
{
// initialize acquisition algorithm
int doppler;
unsigned int indext = 0;
float magt = 0.0;
const gr_complex *in = (const gr_complex *)input_items[0]; //Get the input samples pointer
bool positive_acquisition = false;
int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
//aux vars
unsigned int i;
float fft_normalization_factor;
float fft_normalization_factor = (float)d_fft_size * (float)d_fft_size;
d_input_power = 0.0;
d_mag = 0.0;
d_sample_counter += d_fft_size; // sample counter
//restart acquisition variables
d_gnss_synchro->Acq_delay_samples = 0.0;
d_gnss_synchro->Acq_doppler_hz = 0.0;
d_mag = 0.0;
d_input_power = 0.0;
d_well_count++;
DLOG(INFO) << "Channel: " << d_channel
<< " , doing acquisition of satellite: " << d_gnss_synchro->System << " "<< d_gnss_synchro->PRN
@ -214,19 +238,22 @@ int pcps_acquisition_cc::general_work(int noutput_items,
<< ", doppler_step: " << d_doppler_step;
// 1- Compute the input signal power estimation
if (is_unaligned())
{
volk_32fc_magnitude_squared_32f_u(d_magnitude, in, d_fft_size);
for (i = 0; i < d_fft_size; i++)
d_input_power += d_magnitude[i];
}
else
{
volk_32fc_magnitude_squared_32f_a(d_magnitude, in, d_fft_size);
volk_32f_accumulator_s32f_a(&d_input_power, d_magnitude, d_fft_size);
}
volk_32fc_magnitude_squared_32f_a(d_magnitude, in, d_fft_size);
// for(int i =0; i < 10 ;i++){
// DLOG(INFO) << "d_magnitude["<< i <<"] " << d_magnitude[i];
// }
volk_32f_accumulator_s32f_a(&d_input_power, d_magnitude, d_fft_size);
// DLOG(INFO) << "d_input_power before " << d_input_power;
d_input_power /= (float)d_fft_size;
// DLOG(INFO) << "d_fft_size " << d_fft_size;
// DLOG(INFO) << "d_input_power " << d_input_power;
// 2- Doppler frequency search loop
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
@ -234,16 +261,8 @@ int pcps_acquisition_cc::general_work(int noutput_items,
doppler=-(int)d_doppler_max+d_doppler_step*doppler_index;
if (is_unaligned())
{
volk_32fc_x2_multiply_32fc_u(d_fft_if->get_inbuf(), in,
d_grid_doppler_wipeoffs[doppler_index], d_fft_size);
}
else
{
volk_32fc_x2_multiply_32fc_a(d_fft_if->get_inbuf(), in,
d_grid_doppler_wipeoffs[doppler_index], d_fft_size);
}
volk_32fc_x2_multiply_32fc_a(d_fft_if->get_inbuf(), in,
d_grid_doppler_wipeoffs[doppler_index], d_fft_size);
// 3- Perform the FFT-based convolution (parallel time search)
// Compute the FFT of the carrier wiped--off incoming signal
@ -251,43 +270,15 @@ int pcps_acquisition_cc::general_work(int noutput_items,
// Multiply carrier wiped--off, Fourier transformed incoming signal
// with the local FFT'd code reference using SIMD operations with VOLK library
if (is_unaligned())
{
volk_32fc_x2_multiply_32fc_u(d_ifft->get_inbuf(),
d_fft_if->get_outbuf(), d_fft_codes, d_fft_size);
}
else
{
volk_32fc_x2_multiply_32fc_a(d_ifft->get_inbuf(),
d_fft_if->get_outbuf(), d_fft_codes, d_fft_size);
}
volk_32fc_x2_multiply_32fc_a(d_ifft->get_inbuf(),
d_fft_if->get_outbuf(), d_fft_codes, d_fft_size);
// compute the inverse FFT
d_ifft->execute();
// Search maximum
indext = 0;
magt = 0.0;
fft_normalization_factor = (float)d_fft_size * (float)d_fft_size;
if (is_unaligned())
{
volk_32fc_magnitude_squared_32f_u(d_magnitude, d_ifft->get_outbuf(), d_fft_size);
for (i = 0; i < d_fft_size; i++)
{
if(d_magnitude[i] > magt)
{
magt = d_magnitude[i];
indext = i;
}
}
}
else
{
volk_32fc_magnitude_squared_32f_a(d_magnitude, d_ifft->get_outbuf(), d_fft_size);
volk_32f_index_max_16u_a(&indext, d_magnitude, d_fft_size);
}
volk_32fc_magnitude_squared_32f_a(d_magnitude, d_ifft->get_outbuf(), d_fft_size);
volk_32f_index_max_16u_a(&indext, d_magnitude, d_fft_size);
// Normalize the maximum value to correct the scale factor introduced by FFTW
magt = d_magnitude[indext] / (fft_normalization_factor * fft_normalization_factor);
@ -296,8 +287,17 @@ int pcps_acquisition_cc::general_work(int noutput_items,
if (d_mag < magt)
{
d_mag = magt;
d_gnss_synchro->Acq_delay_samples = (double)(indext % d_samples_per_code);
d_gnss_synchro->Acq_doppler_hz = (double)doppler;
if (d_test_statistics < (magt / d_input_power) || !d_bit_transition_flag)
{
d_gnss_synchro->Acq_delay_samples = (double)(indext % d_samples_per_code);
d_gnss_synchro->Acq_doppler_hz = (double)doppler;
d_gnss_synchro->Acq_samplestamp_samples = d_sample_counter;
// 5- Compute the test statistics and compare to the threshold
//d_test_statistics = 2 * d_fft_size * d_mag / d_input_power;
d_test_statistics = d_mag / d_input_power;
}
}
// Record results to file if required
@ -315,51 +315,90 @@ int pcps_acquisition_cc::general_work(int noutput_items,
}
}
// 5- Compute the test statistics and compare to the threshold
//d_test_statistics = 2 * d_fft_size * d_mag / d_input_power;
d_test_statistics = d_mag / d_input_power;
// 6- Declare positive or negative acquisition using a message queue
if (d_test_statistics > d_threshold)
if (!d_bit_transition_flag)
{
positive_acquisition = true;
d_gnss_synchro->Acq_samplestamp_samples = d_sample_counter;
DLOG(INFO) << "positive acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
if (d_test_statistics > d_threshold)
{
d_state = 2; // Positive acquisition
}
else
{
if (d_well_count == d_max_dwells)
{
d_state = 3; // Negative acquisition
}
}
}
else
{
DLOG(INFO) << "negative acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
if (d_well_count == d_max_dwells)
{
if (d_test_statistics > d_threshold)
{
d_state = 2; // Positive acquisition
}
else
{
d_state = 3; // Negative acquisition
}
}
}
consume_each(1);
break;
}
case 2:
{
// 6.1- Declare positive acquisition using a message queue
DLOG(INFO) << "positive acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
d_active = false;
d_state = 0;
if (positive_acquisition)
{
acquisition_message = 1;
}
else
{
acquisition_message = 2;
}
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
acquisition_message = 1;
d_channel_internal_queue->push(acquisition_message);
consume_each(1);
break;
}
case 3:
{
// 6.2- Declare negative acquisition using a message queue
DLOG(INFO) << "negative acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
d_active = false;
d_state = 0;
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
acquisition_message = 2;
d_channel_internal_queue->push(acquisition_message);
break;
}
}
return 0;
}

36
src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_cc.h
View File

@ -66,9 +66,12 @@ class pcps_acquisition_cc;
typedef boost::shared_ptr<pcps_acquisition_cc> pcps_acquisition_cc_sptr;
pcps_acquisition_cc_sptr
pcps_make_acquisition_cc(unsigned int sampled_ms, unsigned int doppler_max,
long freq, long fs_in, int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump, std::string dump_filename);
pcps_make_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
bool bit_transition_flag,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
/*!
* \brief This class implements a Parallel Code Phase Search Acquisition.
@ -80,13 +83,20 @@ class pcps_acquisition_cc: public gr::block
{
private:
friend pcps_acquisition_cc_sptr
pcps_make_acquisition_cc(unsigned int sampled_ms, unsigned int doppler_max,
long freq, long fs_in, int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump, std::string dump_filename);
pcps_make_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
bool bit_transition_flag,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
pcps_acquisition_cc(unsigned int sampled_ms, unsigned int doppler_max,
long freq, long fs_in, int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump, std::string dump_filename);
pcps_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
bool bit_transition_flag,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
void calculate_magnitudes(gr_complex* fft_begin, int doppler_shift,
int doppler_offset);
@ -98,10 +108,12 @@ private:
int d_samples_per_code;
unsigned int d_doppler_resolution;
float d_threshold;
std::string d_satellite_str;
std::string d_satellite_str;
unsigned int d_doppler_max;
unsigned int d_doppler_step;
unsigned int d_sampled_ms;
unsigned int d_max_dwells;
unsigned int d_well_count;
unsigned int d_fft_size;
unsigned long int d_sample_counter;
gr_complex** d_grid_doppler_wipeoffs;
@ -109,17 +121,19 @@ private:
gr_complex* d_fft_codes;
gr::fft::fft_complex* d_fft_if;
gr::fft::fft_complex* d_ifft;
Gnss_Synchro *d_gnss_synchro;
Gnss_Synchro *d_gnss_synchro;
unsigned int d_code_phase;
float d_doppler_freq;
float d_mag;
float* d_magnitude;
float d_input_power;
float d_test_statistics;
bool d_bit_transition_flag;
gr::msg_queue::sptr d_queue;
concurrent_queue<int> *d_channel_internal_queue;
std::ofstream d_dump_file;
bool d_active;
int d_state;
bool d_dump;
unsigned int d_channel;
std::string d_dump_filename;

420
src/algorithms/acquisition/gnuradio_blocks/pcps_cccwsr_acquisition_cc.cc Normal file
View File

@ -0,0 +1,420 @@
/*!
* \file pcps_cccwsr_acquisition_cc.cc
* \brief This class implements a Parallel Code Phase Search acquisition
* with Coherent Channel Combining With Sign Recovery scheme.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* D.Borio, C.O'Driscoll, G.Lachapelle, "Coherent, Noncoherent and
* Differentially Coherent Combining Techniques for Acquisition of
* New Composite GNSS Signals", IEEE Transactions On Aerospace and
* Electronic Systems vol. 45 no. 3, July 2009, section IV
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "pcps_cccwsr_acquisition_cc.h"
#include "gnss_signal_processing.h"
#include "control_message_factory.h"
#include <gnuradio/io_signature.h>
#include <sstream>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <volk/volk.h>
#include <gperftools/profiler.h>
using google::LogMessage;
pcps_cccwsr_acquisition_cc_sptr pcps_cccwsr_make_acquisition_cc(
unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename)
{
return pcps_cccwsr_acquisition_cc_sptr(
new pcps_cccwsr_acquisition_cc(sampled_ms, max_dwells, doppler_max, freq, fs_in,
samples_per_ms, samples_per_code, queue, dump, dump_filename));
}
pcps_cccwsr_acquisition_cc::pcps_cccwsr_acquisition_cc(
unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename) :
gr::block("pcps_cccwsr_acquisition_cc",
gr::io_signature::make(1, 1, sizeof(gr_complex) * sampled_ms * samples_per_ms),
gr::io_signature::make(0, 0, sizeof(gr_complex) * sampled_ms * samples_per_ms))
{
d_sample_counter = 0; // SAMPLE COUNTER
d_active = false;
d_state = 0;
d_queue = queue;
d_freq = freq;
d_fs_in = fs_in;
d_samples_per_ms = samples_per_ms;
d_samples_per_code = samples_per_code;
d_sampled_ms = sampled_ms;
d_max_dwells = max_dwells;
d_well_count = 0;
d_doppler_max = doppler_max;
d_fft_size = d_sampled_ms * d_samples_per_ms;
d_mag = 0;
d_input_power = 0.0;
d_num_doppler_bins = 0;
//todo: do something if posix_memalign fails
if (posix_memalign((void**)&d_fft_code_data, 16, d_fft_size * sizeof(gr_complex)) == 0){};
if (posix_memalign((void**)&d_fft_code_pilot, 16, d_fft_size * sizeof(gr_complex)) == 0){};
if (posix_memalign((void**)&d_data_correlation, 16, d_fft_size * sizeof(gr_complex)) == 0){};
if (posix_memalign((void**)&d_pilot_correlation, 16, d_fft_size * sizeof(gr_complex)) == 0){};
if (posix_memalign((void**)&d_correlation_plus, 16, d_fft_size * sizeof(gr_complex)) == 0){};
if (posix_memalign((void**)&d_correlation_minus, 16, d_fft_size * sizeof(gr_complex)) == 0){};
if (posix_memalign((void**)&d_magnitude, 16, d_fft_size * sizeof(float)) == 0){};
// Direct FFT
d_fft_if = new gr::fft::fft_complex(d_fft_size, true);
// Inverse FFT
d_ifft = new gr::fft::fft_complex(d_fft_size, false);
// For dumping samples into a file
d_dump = dump;
d_dump_filename = dump_filename;
}
pcps_cccwsr_acquisition_cc::~pcps_cccwsr_acquisition_cc()
{
for (unsigned int doppler_index = 0; doppler_index < d_num_doppler_bins; doppler_index++)
{
free(d_grid_doppler_wipeoffs[doppler_index]);
}
if (d_num_doppler_bins > 0)
{
delete[] d_grid_doppler_wipeoffs;
}
free(d_fft_code_data);
free(d_fft_code_pilot);
free(d_data_correlation);
free(d_pilot_correlation);
free(d_correlation_plus);
free(d_correlation_minus);
free(d_magnitude);
delete d_ifft;
delete d_fft_if;
if (d_dump)
{
d_dump_file.close();
}
}
void pcps_cccwsr_acquisition_cc::set_local_code(std::complex<float> * code_data,
std::complex<float> * code_pilot)
{
memcpy(d_fft_if->get_inbuf(), code_data, sizeof(gr_complex)*d_fft_size);
d_fft_if->execute(); // We need the FFT of local code
//Conjugate the local code
if (is_unaligned())
{
volk_32fc_conjugate_32fc_u(d_fft_code_data,d_fft_if->get_outbuf(),d_fft_size);
}
else
{
volk_32fc_conjugate_32fc_a(d_fft_code_data,d_fft_if->get_outbuf(),d_fft_size);
}
memcpy(d_fft_if->get_inbuf(), code_pilot, sizeof(gr_complex)*d_fft_size);
d_fft_if->execute(); // We need the FFT of local code
//Conjugate the local code,
if (is_unaligned())
{
volk_32fc_conjugate_32fc_u(d_fft_code_pilot,d_fft_if->get_outbuf(),d_fft_size);
}
else
{
volk_32fc_conjugate_32fc_a(d_fft_code_pilot,d_fft_if->get_outbuf(),d_fft_size);
}
}
void pcps_cccwsr_acquisition_cc::init()
{
d_gnss_synchro->Acq_delay_samples = 0.0;
d_gnss_synchro->Acq_doppler_hz = 0.0;
d_gnss_synchro->Acq_samplestamp_samples = 0;
d_mag = 0.0;
d_input_power = 0.0;
// Create the carrier Doppler wipeoff signals
d_num_doppler_bins = 0;//floor(2*std::abs((int)d_doppler_max)/d_doppler_step);
for (int doppler = (int)(-d_doppler_max); doppler <= (int)d_doppler_max; doppler += d_doppler_step)
{
d_num_doppler_bins++;
}
d_grid_doppler_wipeoffs = new gr_complex*[d_num_doppler_bins];
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
if (posix_memalign((void**)&(d_grid_doppler_wipeoffs[doppler_index]), 16,
d_fft_size * sizeof(gr_complex)) == 0){};
int doppler=-(int)d_doppler_max+d_doppler_step*doppler_index;
complex_exp_gen_conj(d_grid_doppler_wipeoffs[doppler_index],
d_freq + doppler, d_fs_in, d_fft_size);
}
}
int pcps_cccwsr_acquisition_cc::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
switch (d_state)
{
case 0:
{
if (d_active)
{
//restart acquisition variables
d_gnss_synchro->Acq_delay_samples = 0.0;
d_gnss_synchro->Acq_doppler_hz = 0.0;
d_gnss_synchro->Acq_samplestamp_samples = 0;
d_well_count = 0;
d_mag = 0.0;
d_input_power = 0.0;
d_test_statistics = 0.0;
d_state = 1;
}
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
break;
}
case 1:
{
// initialize acquisition algorithm
int doppler;
unsigned int indext = 0;
unsigned int indext_plus = 0;
unsigned int indext_minus = 0;
float magt = 0.0;
float magt_plus = 0.0;
float magt_minus = 0.0;
const gr_complex *in = (const gr_complex *)input_items[0]; //Get the input samples pointer
float fft_normalization_factor = (float)d_fft_size * (float)d_fft_size;
d_sample_counter += d_fft_size; // sample counter
d_well_count++;
DLOG(INFO) << "Channel: " << d_channel
<< " , doing acquisition of satellite: " << d_gnss_synchro->System << " "<< d_gnss_synchro->PRN
<< " ,sample stamp: " << d_sample_counter << ", threshold: "
<< d_threshold << ", doppler_max: " << d_doppler_max
<< ", doppler_step: " << d_doppler_step;
// 1- Compute the input signal power estimation
volk_32fc_magnitude_squared_32f_a(d_magnitude, in, d_fft_size);
volk_32f_accumulator_s32f_a(&d_input_power, d_magnitude, d_fft_size);
d_input_power /= (float)d_fft_size;
// 2- Doppler frequency search loop
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
// doppler search steps
doppler=-(int)d_doppler_max+d_doppler_step*doppler_index;
volk_32fc_x2_multiply_32fc_a(d_fft_if->get_inbuf(), in,
d_grid_doppler_wipeoffs[doppler_index], d_fft_size);
// 3- Perform the FFT-based convolution (parallel time search)
// Compute the FFT of the carrier wiped--off incoming signal
d_fft_if->execute();
// Multiply carrier wiped--off, Fourier transformed incoming signal
// with the local FFT'd code reference {data+j*pilot} using SIMD operations with VOLK library
volk_32fc_x2_multiply_32fc_a(d_ifft->get_inbuf(),
d_fft_if->get_outbuf(), d_fft_code_data, d_fft_size);
// compute the inverse FFT
d_ifft->execute();
memcpy(d_data_correlation, d_ifft->get_outbuf(), sizeof(gr_complex)*d_fft_size);
volk_32fc_x2_multiply_32fc_a(d_ifft->get_inbuf(),
d_fft_if->get_outbuf(), d_fft_code_pilot, d_fft_size);
d_ifft->execute();
memcpy(d_pilot_correlation, d_ifft->get_outbuf(), sizeof(gr_complex)*d_fft_size);
for (unsigned int i = 0; i < d_fft_size; i++)
{
d_correlation_plus[i] = std::complex<float>(
d_data_correlation[i].real() - d_pilot_correlation[i].imag(),
d_data_correlation[i].imag() + d_pilot_correlation[i].real());
d_correlation_minus[i] = std::complex<float>(
d_data_correlation[i].real() + d_pilot_correlation[i].imag(),
d_data_correlation[i].imag() - d_pilot_correlation[i].real());
}
volk_32fc_magnitude_squared_32f_a(d_magnitude, d_correlation_plus, d_fft_size);
volk_32f_index_max_16u_a(&indext_plus, d_magnitude, d_fft_size);
magt_plus = d_magnitude[indext_plus] / (fft_normalization_factor * fft_normalization_factor);
volk_32fc_magnitude_squared_32f_a(d_magnitude, d_correlation_minus, d_fft_size);
volk_32f_index_max_16u_a(&indext_minus, d_magnitude, d_fft_size);
magt_minus = d_magnitude[indext_minus] / (fft_normalization_factor * fft_normalization_factor);
if (magt_plus >= magt_minus)
{
magt = magt_plus;
indext = indext_plus;
}
else
{
magt = magt_minus;
indext = indext_minus;
}
// 4- record the maximum peak and the associated synchronization parameters
if (d_mag < magt)
{
d_mag = magt;
d_gnss_synchro->Acq_delay_samples = (double)(indext % d_samples_per_code);
d_gnss_synchro->Acq_doppler_hz = (double)doppler;
d_gnss_synchro->Acq_samplestamp_samples = d_sample_counter;
}
// Record results to file if required
if (d_dump)
{
std::stringstream filename;
std::streamsize n = 2 * sizeof(float) * (d_fft_size); // complex file write
filename.str("");
filename << "../data/test_statistics_" << d_gnss_synchro->System
<<"_" << d_gnss_synchro->Signal << "_sat_"
<< d_gnss_synchro->PRN << "_doppler_" << doppler << ".dat";
d_dump_file.open(filename.str().c_str(), std::ios::out | std::ios::binary);
d_dump_file.write((char*)d_ifft->get_outbuf(), n); //write directly |abs(x)|^2 in this Doppler bin?
d_dump_file.close();
}
}
// 5- Compute the test statistics and compare to the threshold
//d_test_statistics = 2 * d_fft_size * d_mag / d_input_power;
d_test_statistics = d_mag / d_input_power;
// 6- Declare positive or negative acquisition using a message queue
if (d_test_statistics > d_threshold)
{
d_state = 2; // Positive acquisition
}
else
{
if (d_well_count == d_max_dwells)
{
d_state = 3; // Negative acquisition
}
}
break;
}
case 2:
{
// 6.1- Declare positive acquisition using a message queue
DLOG(INFO) << "positive acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
d_active = false;
d_state = 0;
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
acquisition_message = 1;
d_channel_internal_queue->push(acquisition_message);
break;
}
case 3:
{
// 6.2- Declare negative acquisition using a message queue
DLOG(INFO) << "negative acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
d_active = false;
d_state = 0;
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
acquisition_message = 2;
d_channel_internal_queue->push(acquisition_message);
break;
}
}
return 0;
}

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/*!
* \file pcps_cccwsr_acquisition_cc.h
* \brief This class implements a Parallel Code Phase Search acquisition
* with Coherent Channel Combining With Sign Recovery scheme.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* D.Borio, C.O'Driscoll, G.Lachapelle, "Coherent, Noncoherent and
* Differentially Coherent Combining Techniques for Acquisition of
* New Composite GNSS Signals", IEEE Transactions On Aerospace and
* Electronic Systems vol. 45 no. 3, July 2009, section IV
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_PCPS_CCCWSR_ACQUISITION_CC_H_
#define GNSS_SDR_PCPS_CCCWSR_ACQUISITION_CC_H_
#include <fstream>
#include <gnuradio/block.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/gr_complex.h>
#include <gnuradio/fft/fft.h>
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
#include "gnss_synchro.h"
#include <boost/shared_array.hpp>
class pcps_cccwsr_acquisition_cc;
typedef boost::shared_ptr<pcps_cccwsr_acquisition_cc> pcps_cccwsr_acquisition_cc_sptr;
pcps_cccwsr_acquisition_cc_sptr
pcps_cccwsr_make_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
/*!
* \brief This class implements a Parallel Code Phase Search Acquisition with
* Coherent Channel Combining With Sign Recovery scheme.
*/
class pcps_cccwsr_acquisition_cc: public gr::block
{
private:
friend pcps_cccwsr_acquisition_cc_sptr
pcps_cccwsr_make_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
pcps_cccwsr_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
void calculate_magnitudes(gr_complex* fft_begin, int doppler_shift,
int doppler_offset);
long d_fs_in;
long d_freq;
int d_samples_per_ms;
int d_samples_per_code;
unsigned int d_doppler_resolution;
float d_threshold;
std::string d_satellite_str;
unsigned int d_doppler_max;
unsigned int d_doppler_step;
unsigned int d_sampled_ms;
unsigned int d_max_dwells;
unsigned int d_well_count;
unsigned int d_fft_size;
unsigned long int d_sample_counter;
gr_complex** d_grid_doppler_wipeoffs;
unsigned int d_num_doppler_bins;
gr_complex* d_fft_code_data;
gr_complex* d_fft_code_pilot;
gr::fft::fft_complex* d_fft_if;
gr::fft::fft_complex* d_ifft;
Gnss_Synchro *d_gnss_synchro;
unsigned int d_code_phase;
float d_doppler_freq;
float d_mag;
float* d_magnitude;
gr_complex* d_data_correlation;
gr_complex* d_pilot_correlation;
gr_complex* d_correlation_plus;
gr_complex* d_correlation_minus;
float d_input_power;
float d_test_statistics;
gr::msg_queue::sptr d_queue;
concurrent_queue<int> *d_channel_internal_queue;
std::ofstream d_dump_file;
bool d_active;
int d_state;
bool d_dump;
unsigned int d_channel;
std::string d_dump_filename;
public:
/*!
* \brief Default destructor.
*/
~pcps_cccwsr_acquisition_cc();
/*!
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
* to exchange synchronization data between acquisition and tracking blocks.
* \param p_gnss_synchro Satellite information shared by the processing blocks.
*/
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro)
{
d_gnss_synchro = p_gnss_synchro;
}
/*!
* \brief Returns the maximum peak of grid search.
*/
unsigned int mag()
{
return d_mag;
}
/*!
* \brief Initializes acquisition algorithm.
*/
void init();
/*!
* \brief Sets local code for CCCWSR acquisition algorithm.
* \param data_code - Pointer to the data PRN code.
* \param pilot_code - Pointer to the pilot PRN code.
*/
void set_local_code(std::complex<float> * code_data, std::complex<float> * code_pilot);
/*!
* \brief Starts acquisition algorithm, turning from standby mode to
* active mode
* \param active - bool that activates/deactivates the block.
*/
void set_active(bool active)
{
d_active = active;
}
/*!
* \brief Set acquisition channel unique ID
* \param channel - receiver channel.
*/
void set_channel(unsigned int channel)
{
d_channel = channel;
}
/*!
* \brief Set statistics threshold of CCCWSR algorithm.
* \param threshold - Threshold for signal detection (check \ref Navitec2012,
* Algorithm 1, for a definition of this threshold).
*/
void set_threshold(float threshold)
{
d_threshold = threshold;
}
/*!
* \brief Set maximum Doppler grid search
* \param doppler_max - Maximum Doppler shift considered in the grid search [Hz].
*/
void set_doppler_max(unsigned int doppler_max)
{
d_doppler_max = doppler_max;
}
/*!
* \brief Set Doppler steps for the grid search
* \param doppler_step - Frequency bin of the search grid [Hz].
*/
void set_doppler_step(unsigned int doppler_step)
{
d_doppler_step = doppler_step;
}
/*!
* \brief Set tracking channel internal queue.
* \param channel_internal_queue - Channel's internal blocks information queue.
*/
void set_channel_queue(concurrent_queue<int> *channel_internal_queue)
{
d_channel_internal_queue = channel_internal_queue;
}
/*!
* \brief Coherent Channel Combining With Sign Recovery Acquisition signal processing.
*/
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* GNSS_SDR_PCPS_CCCWSR_ACQUISITION_CC_H_*/

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/*!
* \file pcps_multithread_acquisition_cc.cc
* \brief This class implements a Parallel Code Phase Search Acquisition
* \authors <ul>
* <li> Javier Arribas, 2011. jarribas(at)cttc.es
* <li> Luis Esteve, 2012. luis(at)epsilon-formacion.com
* <li> Marc Molina, 2013. marc.molina.pena@gmail.com
* </ul>
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "pcps_multithread_acquisition_cc.h"
#include "gnss_signal_processing.h"
#include "control_message_factory.h"
#include <gnuradio/io_signature.h>
#include <sstream>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <volk/volk.h>
using google::LogMessage;
pcps_multithread_acquisition_cc_sptr pcps_make_multithread_acquisition_cc(
unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
bool bit_transition_flag,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename)
{
return pcps_multithread_acquisition_cc_sptr(
new pcps_multithread_acquisition_cc(sampled_ms, max_dwells, doppler_max, freq, fs_in, samples_per_ms,
samples_per_code, bit_transition_flag, queue, dump, dump_filename));
}
pcps_multithread_acquisition_cc::pcps_multithread_acquisition_cc(
unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
bool bit_transition_flag,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename) :
gr::block("pcps_multithread_acquisition_cc",
gr::io_signature::make(1, 1, sizeof(gr_complex) * sampled_ms * samples_per_ms),
gr::io_signature::make(0, 0, sizeof(gr_complex) * sampled_ms * samples_per_ms))
{
d_sample_counter = 0; // SAMPLE COUNTER
d_active = false;
d_state = 0;
d_queue = queue;
d_freq = freq;
d_fs_in = fs_in;
d_samples_per_ms = samples_per_ms;
d_samples_per_code = samples_per_code;
d_sampled_ms = sampled_ms;
d_max_dwells = max_dwells;
d_well_count = 0;
d_doppler_max = doppler_max;
d_fft_size = d_sampled_ms * d_samples_per_ms;
d_mag = 0;
d_input_power = 0.0;
d_num_doppler_bins = 0;
d_bit_transition_flag = bit_transition_flag;
//todo: do something if posix_memalign fails
if (posix_memalign((void**)&d_fft_codes, 16, d_fft_size * sizeof(gr_complex)) == 0){};
if (posix_memalign((void**)&d_magnitude, 16, d_fft_size * sizeof(gr_complex)) == 0){};
// Direct FFT
d_fft_if = new gr::fft::fft_complex(d_fft_size, true);
// Inverse FFT
d_ifft = new gr::fft::fft_complex(d_fft_size, false);
// For dumping samples into a file
d_dump = dump;
d_dump_filename = dump_filename;
}
pcps_multithread_acquisition_cc::~pcps_multithread_acquisition_cc()
{
for (unsigned int doppler_index = 0; doppler_index < d_num_doppler_bins; doppler_index++)
{
free(d_grid_doppler_wipeoffs[doppler_index]);
}
if (d_num_doppler_bins > 0)
{
delete[] d_grid_doppler_wipeoffs;
}
free(d_fft_codes);
free(d_magnitude);
delete d_ifft;
delete d_fft_if;
if (d_dump)
{
d_dump_file.close();
}
}
void pcps_multithread_acquisition_cc::set_local_code(std::complex<float> * code)
{
memcpy(d_fft_if->get_inbuf(), code, sizeof(gr_complex)*d_fft_size);
d_fft_if->execute(); // We need the FFT of local code
//Conjugate the local code
if (is_unaligned())
{
volk_32fc_conjugate_32fc_u(d_fft_codes,d_fft_if->get_outbuf(),d_fft_size);
}
else
{
volk_32fc_conjugate_32fc_a(d_fft_codes,d_fft_if->get_outbuf(),d_fft_size);
}
}
void pcps_multithread_acquisition_cc::perform_acquisition(const gr_complex* in, unsigned int samplestamp)
{
// initialize acquisition algorithm
int doppler;
unsigned int indext = 0;
float magt = 0.0;
float fft_normalization_factor = (float)d_fft_size * (float)d_fft_size;
d_input_power = 0.0;
d_mag = 0.0;
d_well_count++;
DLOG(INFO) << "Channel: " << d_channel
<< " , doing acquisition of satellite: " << d_gnss_synchro->System << " "<< d_gnss_synchro->PRN
<< " ,sample stamp: " << d_sample_counter << ", threshold: "
<< d_threshold << ", doppler_max: " << d_doppler_max
<< ", doppler_step: " << d_doppler_step;
// 1- Compute the input signal power estimation
volk_32fc_magnitude_squared_32f_a(d_magnitude, in, d_fft_size);
volk_32f_accumulator_s32f_a(&d_input_power, d_magnitude, d_fft_size);
d_input_power /= (float)d_fft_size;
// 2- Doppler frequency search loop
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
// doppler search steps
doppler=-(int)d_doppler_max+d_doppler_step*doppler_index;
volk_32fc_x2_multiply_32fc_a(d_fft_if->get_inbuf(), in,
d_grid_doppler_wipeoffs[doppler_index], d_fft_size);
// 3- Perform the FFT-based convolution (parallel time search)
// Compute the FFT of the carrier wiped--off incoming signal
d_fft_if->execute();
// Multiply carrier wiped--off, Fourier transformed incoming signal
// with the local FFT'd code reference using SIMD operations with VOLK library
volk_32fc_x2_multiply_32fc_a(d_ifft->get_inbuf(),
d_fft_if->get_outbuf(), d_fft_codes, d_fft_size);
// compute the inverse FFT
d_ifft->execute();
// Search maximum
volk_32fc_magnitude_squared_32f_a(d_magnitude, d_ifft->get_outbuf(), d_fft_size);
volk_32f_index_max_16u_a(&indext, d_magnitude, d_fft_size);
// Normalize the maximum value to correct the scale factor introduced by FFTW
magt = d_magnitude[indext] / (fft_normalization_factor * fft_normalization_factor);
// 4- record the maximum peak and the associated synchronization parameters
if (d_mag < magt)
{
d_mag = magt;
if (d_test_statistics < (magt / d_input_power) || !d_bit_transition_flag)
{
d_gnss_synchro->Acq_delay_samples = (double)(indext % d_samples_per_code);
d_gnss_synchro->Acq_doppler_hz = (double)doppler;
d_gnss_synchro->Acq_samplestamp_samples = samplestamp;
// 5- Compute the test statistics and compare to the threshold
//d_test_statistics = 2 * d_fft_size * d_mag / d_input_power;
d_test_statistics = d_mag / d_input_power;
}
}
// Record results to file if required
if (d_dump)
{
std::stringstream filename;
std::streamsize n = 2 * sizeof(float) * (d_fft_size); // complex file write
filename.str("");
filename << "../data/test_statistics_" << d_gnss_synchro->System
<<"_" << d_gnss_synchro->Signal << "_sat_"
<< d_gnss_synchro->PRN << "_doppler_" << doppler << ".dat";
d_dump_file.open(filename.str().c_str(), std::ios::out | std::ios::binary);
d_dump_file.write((char*)d_ifft->get_outbuf(), n); //write directly |abs(x)|^2 in this Doppler bin?
d_dump_file.close();
}
}
if (!d_bit_transition_flag)
{
if (d_test_statistics > d_threshold)
{
d_state = 3; // Positive acquisition
}
else
{
if (d_well_count == d_max_dwells)
{
d_state = 4; // Negative acquisition
}
else
{
d_state = 1; // Process next block
}
}
}
else
{
if (d_well_count == d_max_dwells)
{
if (d_test_statistics > d_threshold)
{
d_state = 3; // Positive acquisition
}
else
{
d_state = 4; // Negative acquisition
}
}
else
{
d_state = 1; // Process next block
}
}
}
void pcps_multithread_acquisition_cc::init()
{
d_gnss_synchro->Acq_delay_samples = 0.0;
d_gnss_synchro->Acq_doppler_hz = 0.0;
d_gnss_synchro->Acq_samplestamp_samples = 0;
d_mag = 0.0;
d_input_power = 0.0;
// Create the carrier Doppler wipeoff signals
d_num_doppler_bins = 0;//floor(2*std::abs((int)d_doppler_max)/d_doppler_step);
for (int doppler = (int)(-d_doppler_max); doppler <= (int)d_doppler_max; doppler += d_doppler_step)
{
d_num_doppler_bins++;
}
d_grid_doppler_wipeoffs = new gr_complex*[d_num_doppler_bins];
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
if (posix_memalign((void**)&(d_grid_doppler_wipeoffs[doppler_index]), 16,
d_fft_size * sizeof(gr_complex)) == 0){};
int doppler=-(int)d_doppler_max+d_doppler_step*doppler_index;
complex_exp_gen_conj(d_grid_doppler_wipeoffs[doppler_index],
d_freq + doppler, d_fs_in, d_fft_size);
}
}
int pcps_multithread_acquisition_cc::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
switch (d_state)
{
case 0:
{
if (d_active)
{
//restart acquisition variables
d_gnss_synchro->Acq_delay_samples = 0.0;
d_gnss_synchro->Acq_doppler_hz = 0.0;
d_gnss_synchro->Acq_samplestamp_samples = 0;
d_well_count = 0;
d_mag = 0.0;
d_input_power = 0.0;
d_test_statistics = 0.0;
d_state = 1;
}
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
break;
}
case 1:
{
const gr_complex *in = (const gr_complex *)input_items[0]; //Get the input samples pointer
d_sample_counter += d_fft_size; // sample counter
boost::thread(&pcps_multithread_acquisition_cc::perform_acquisition, this, in, d_sample_counter);
d_state = 2;
consume_each(1);
break;
}
case 2:
{
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
break;
}
case 3:
{
// Declare positive acquisition using a message queue
DLOG(INFO) << "positive acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
d_active = false;
d_state = 0;
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
acquisition_message = 1;
d_channel_internal_queue->push(acquisition_message);
break;
}
case 4:
{
// Declare negative acquisition using a message queue
DLOG(INFO) << "negative acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
d_active = false;
d_state = 0;
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
acquisition_message = 2;
d_channel_internal_queue->push(acquisition_message);
break;
}
}
return 0;
}

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/*!
* \file pcps_multithread_acquisition_cc.h
* \brief This class implements a Parallel Code Phase Search Acquisition
*
* Acquisition strategy (Kay Borre book + CFAR threshold).
* <ol>
* <li> Compute the input signal power estimation
* <li> Doppler serial search loop
* <li> Perform the FFT-based circular convolution (parallel time search)
* <li> Record the maximum peak and the associated synchronization parameters
* <li> Compute the test statistics and compare to the threshold
* <li> Declare positive or negative acquisition using a message queue
* </ol>
*
* Kay Borre book: K.Borre, D.M.Akos, N.Bertelsen, P.Rinder, and S.H.Jensen,
* "A Software-Defined GPS and Galileo Receiver. A Single-Frequency
* Approach", Birkha user, 2007. pp 81-84
*
* \authors <ul>
* <li> Javier Arribas, 2011. jarribas(at)cttc.es
* <li> Luis Esteve, 2012. luis(at)epsilon-formacion.com
* <li> Marc Molina, 2013. marc.molina.pena@gmail.com
* </ul>
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_PCPS_MULTITHREAD_ACQUISITION_CC_H_
#define GNSS_SDR_PCPS_MULTITHREAD_ACQUISITION_CC_H_
#include <fstream>
#include <gnuradio/block.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/gr_complex.h>
#include <gnuradio/fft/fft.h>
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
#include "gnss_synchro.h"
class pcps_multithread_acquisition_cc;
typedef boost::shared_ptr<pcps_multithread_acquisition_cc> pcps_multithread_acquisition_cc_sptr;
pcps_multithread_acquisition_cc_sptr
pcps_make_multithread_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
bool bit_transition_flag,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
/*!
* \brief This class implements a Parallel Code Phase Search Acquisition.
*
* Check \ref Navitec2012 "An Open Source Galileo E1 Software Receiver",
* Algorithm 1, for a pseudocode description of this implementation.
*/
class pcps_multithread_acquisition_cc: public gr::block
{
private:
friend pcps_multithread_acquisition_cc_sptr
pcps_make_multithread_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
bool bit_transition_flag,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
pcps_multithread_acquisition_cc(unsigned int sampled_ms, unsigned int max_dwells,
unsigned int doppler_max, long freq, long fs_in,
int samples_per_ms, int samples_per_code,
bool bit_transition_flag,
gr::msg_queue::sptr queue, bool dump,
std::string dump_filename);
void calculate_magnitudes(gr_complex* fft_begin, int doppler_shift,
int doppler_offset);
long d_fs_in;
long d_freq;
int d_samples_per_ms;
int d_samples_per_code;
unsigned int d_doppler_resolution;
float d_threshold;
std::string d_satellite_str;
unsigned int d_doppler_max;
unsigned int d_doppler_step;
unsigned int d_sampled_ms;
unsigned int d_max_dwells;
unsigned int d_well_count;
unsigned int d_fft_size;
unsigned long int d_sample_counter;
gr_complex** d_grid_doppler_wipeoffs;
unsigned int d_num_doppler_bins;
gr_complex* d_fft_codes;
gr::fft::fft_complex* d_fft_if;
gr::fft::fft_complex* d_ifft;
Gnss_Synchro *d_gnss_synchro;
unsigned int d_code_phase;
float d_doppler_freq;
float d_mag;
float* d_magnitude;
float d_input_power;
float d_test_statistics;
bool d_bit_transition_flag;
gr::msg_queue::sptr d_queue;
concurrent_queue<int> *d_channel_internal_queue;
std::ofstream d_dump_file;
bool d_active;
int d_state;
bool d_dump;
unsigned int d_channel;
std::string d_dump_filename;
public:
/*!
* \brief Default destructor.
*/
~pcps_multithread_acquisition_cc();
/*!
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
* to exchange synchronization data between acquisition and tracking blocks.
* \param p_gnss_synchro Satellite information shared by the processing blocks.
*/
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro)
{
d_gnss_synchro = p_gnss_synchro;
}
/*!
* \brief Returns the maximum peak of grid search.
*/
unsigned int mag()
{
return d_mag;
}
/*!
* \brief Initializes acquisition algorithm.
*/
void init();
/*!
* \brief Sets local code for PCPS acquisition algorithm.
* \param code - Pointer to the PRN code.
*/
void set_local_code(std::complex<float> * code);
/*!
* \brief Starts acquisition algorithm, turning from standby mode to
* active mode
* \param active - bool that activates/deactivates the block.
*/
void set_active(bool active)
{
d_active = active;
}
/*!
* \brief Set acquisition channel unique ID
* \param channel - receiver channel.
*/
void set_channel(unsigned int channel)
{
d_channel = channel;
}
/*!
* \brief Set statistics threshold of PCPS algorithm.
* \param threshold - Threshold for signal detection (check \ref Navitec2012,
* Algorithm 1, for a definition of this threshold).
*/
void set_threshold(float threshold)
{
d_threshold = threshold;
}
/*!
* \brief Set maximum Doppler grid search
* \param doppler_max - Maximum Doppler shift considered in the grid search [Hz].
*/
void set_doppler_max(unsigned int doppler_max)
{
d_doppler_max = doppler_max;
}
/*!
* \brief Set Doppler steps for the grid search
* \param doppler_step - Frequency bin of the search grid [Hz].
*/
void set_doppler_step(unsigned int doppler_step)
{
d_doppler_step = doppler_step;
}
/*!
* \brief Set tracking channel internal queue.
* \param channel_internal_queue - Channel's internal blocks information queue.
*/
void set_channel_queue(concurrent_queue<int> *channel_internal_queue)
{
d_channel_internal_queue = channel_internal_queue;
}
/*!
* \brief Parallel Code Phase Search Acquisition signal processing.
*/
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
void perform_acquisition(const gr_complex* in, const unsigned int samplestamp);
};
#endif /* GNSS_SDR_PCPS_MULTITHREAD_ACQUISITION_CC_H_*/

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/*!
* \file pcps_tong_acquisition_cc.h
* \brief This class implements a Parallel Code Phase Search Acquisition with
* Tong algorithm.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* Acquisition strategy (Kaplan book + CFAR threshold).
* <ol>
* <li> Compute the input signal power estimation.
* <li> Doppler serial search loop.
* <li> Perform the FFT-based circular convolution (parallel time search).
* <li> Compute the tests statistics for all the cells.
* <li> Accumulate the grid of tests statistics with the previous grids.
* <li> Record the maximum peak and the associated synchronization parameters.
* <li> Compare the maximum averaged test statistics with a threshold.
* <li> If the test statistics exceeds the threshold, increment the Tong counter.
* <li> Otherwise, decrement the Tong counter.
* <li> If the Tong counter is equal to a given maximum value, declare positive
* <li> acquisition. If the Tong counter is equa to zero, declare negative
* <li> acquisition. Otherwise, process the next block.
* </ol>
*
* Kaplan book: D.Kaplan, J.Hegarty, "Understanding GPS. Principles
* and Applications", Artech House, 2006, pp 223-227
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "pcps_tong_acquisition_cc.h"
#include "gnss_signal_processing.h"
#include "control_message_factory.h"
#include <gnuradio/io_signature.h>
#include <sstream>
#include <glog/log_severity.h>
#include <glog/logging.h>
#include <volk/volk.h>
using google::LogMessage;
pcps_tong_acquisition_cc_sptr pcps_tong_make_acquisition_cc(
unsigned int sampled_ms, unsigned int doppler_max,
long freq, long fs_in, int samples_per_ms,
int samples_per_code, unsigned int tong_init_val,
unsigned int tong_max_val, gr::msg_queue::sptr queue,
bool dump, std::string dump_filename)
{
return pcps_tong_acquisition_cc_sptr(
new pcps_tong_acquisition_cc(sampled_ms, doppler_max, freq, fs_in, samples_per_ms, samples_per_code,
tong_init_val, tong_max_val, queue, dump, dump_filename));
}
pcps_tong_acquisition_cc::pcps_tong_acquisition_cc(
unsigned int sampled_ms, unsigned int doppler_max,
long freq, long fs_in, int samples_per_ms,
int samples_per_code, unsigned int tong_init_val,
unsigned int tong_max_val, gr::msg_queue::sptr queue,
bool dump, std::string dump_filename) :
gr::block("pcps_tong_acquisition_cc",
gr::io_signature::make(1, 1, sizeof(gr_complex) * sampled_ms * samples_per_ms),
gr::io_signature::make(0, 0, sizeof(gr_complex) * sampled_ms * samples_per_ms))
{
d_sample_counter = 0; // SAMPLE COUNTER
d_active = false;
d_state = 0;
d_queue = queue;
d_freq = freq;
d_fs_in = fs_in;
d_samples_per_ms = samples_per_ms;
d_samples_per_code = samples_per_code;
d_sampled_ms = sampled_ms;
d_well_count = 0;
d_tong_max_val = tong_max_val;
d_tong_init_val = tong_init_val;
d_tong_count = d_tong_init_val;
d_doppler_max = doppler_max;
d_fft_size = d_sampled_ms * d_samples_per_ms;
d_mag = 0;
d_input_power = 0.0;
d_num_doppler_bins = 0;
//todo: do something if posix_memalign fails
if (posix_memalign((void**)&d_fft_codes, 16, d_fft_size * sizeof(gr_complex)) == 0){};
if (posix_memalign((void**)&d_magnitude, 16, d_fft_size * sizeof(gr_complex)) == 0){};
// Direct FFT
d_fft_if = new gr::fft::fft_complex(d_fft_size, true);
// Inverse FFT
d_ifft = new gr::fft::fft_complex(d_fft_size, false);
// For dumping samples into a file
d_dump = dump;
d_dump_filename = dump_filename;
}
pcps_tong_acquisition_cc::~pcps_tong_acquisition_cc()
{
for (unsigned int doppler_index = 0; doppler_index < d_num_doppler_bins; doppler_index++)
{
free(d_grid_doppler_wipeoffs[doppler_index]);
free(d_grid_data[doppler_index]);
}
if (d_num_doppler_bins > 0)
{
delete[] d_grid_doppler_wipeoffs;
delete[] d_grid_data;
}
free(d_fft_codes);
free(d_magnitude);
delete d_ifft;
delete d_fft_if;
if (d_dump)
{
d_dump_file.close();
}
}
void pcps_tong_acquisition_cc::set_local_code(std::complex<float> * code)
{
memcpy(d_fft_if->get_inbuf(), code, sizeof(gr_complex)*d_fft_size);
d_fft_if->execute(); // We need the FFT of local code
//Conjugate the local code
if (is_unaligned())
{
volk_32fc_conjugate_32fc_u(d_fft_codes,d_fft_if->get_outbuf(),d_fft_size);
}
else
{
volk_32fc_conjugate_32fc_a(d_fft_codes,d_fft_if->get_outbuf(),d_fft_size);
}
}
void pcps_tong_acquisition_cc::init()
{
d_gnss_synchro->Acq_delay_samples = 0.0;
d_gnss_synchro->Acq_doppler_hz = 0.0;
d_gnss_synchro->Acq_samplestamp_samples = 0;
d_mag = 0.0;
d_input_power = 0.0;
// Create the carrier Doppler wipeoff signals
d_num_doppler_bins = 0;//floor(2*std::abs((int)d_doppler_max)/d_doppler_step);
for (int doppler = (int)(-d_doppler_max); doppler <= (int)d_doppler_max; doppler += d_doppler_step)
{
d_num_doppler_bins++;
}
d_grid_doppler_wipeoffs = new gr_complex*[d_num_doppler_bins];
d_grid_data = new float*[d_num_doppler_bins];
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
if (posix_memalign((void**)&(d_grid_doppler_wipeoffs[doppler_index]), 16,
d_fft_size * sizeof(gr_complex)) == 0){};
int doppler=-(int)d_doppler_max+d_doppler_step*doppler_index;
complex_exp_gen_conj(d_grid_doppler_wipeoffs[doppler_index],
d_freq + doppler, d_fs_in, d_fft_size);
if (posix_memalign((void**)&(d_grid_data[doppler_index]), 16,
d_fft_size * sizeof(float)) == 0){};
for (unsigned int i = 0; i < d_fft_size; i++)
{
d_grid_data[doppler_index][i] = 0;
}
}
}
int pcps_tong_acquisition_cc::general_work(int noutput_items,
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
int acquisition_message = -1; //0=STOP_CHANNEL 1=ACQ_SUCCEES 2=ACQ_FAIL
switch (d_state)
{
case 0:
{
if (d_active)
{
//restart acquisition variables
d_gnss_synchro->Acq_delay_samples = 0.0;
d_gnss_synchro->Acq_doppler_hz = 0.0;
d_gnss_synchro->Acq_samplestamp_samples = 0;
d_well_count = 0;
d_tong_count = d_tong_init_val;
d_mag = 0.0;
d_input_power = 0.0;
d_test_statistics = 0.0;
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
for (unsigned int i = 0; i < d_fft_size; i++)
{
d_grid_data[doppler_index][i] = 0;
}
}
d_state = 1;
}
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
break;
}
case 1:
{
// initialize acquisition algorithm
int doppler;
unsigned int indext = 0;
float magt = 0.0;
const gr_complex *in = (const gr_complex *)input_items[0]; //Get the input samples pointer
float fft_normalization_factor = (float)d_fft_size * (float)d_fft_size;
d_input_power = 0.0;
d_mag = 0.0;
d_sample_counter += d_fft_size; // sample counter
d_well_count++;
DLOG(INFO) << "Channel: " << d_channel
<< " , doing acquisition of satellite: " << d_gnss_synchro->System << " "<< d_gnss_synchro->PRN
<< " ,sample stamp: " << d_sample_counter << ", threshold: "
<< d_threshold << ", doppler_max: " << d_doppler_max
<< ", doppler_step: " << d_doppler_step;
// 1- Compute the input signal power estimation
volk_32fc_magnitude_squared_32f_a(d_magnitude, in, d_fft_size);
volk_32f_accumulator_s32f_a(&d_input_power, d_magnitude, d_fft_size);
d_input_power /= (float)d_fft_size;
// 2- Doppler frequency search loop
for (unsigned int doppler_index=0;doppler_index<d_num_doppler_bins;doppler_index++)
{
// doppler search steps
doppler=-(int)d_doppler_max+d_doppler_step*doppler_index;
volk_32fc_x2_multiply_32fc_a(d_fft_if->get_inbuf(), in,
d_grid_doppler_wipeoffs[doppler_index], d_fft_size);
// 3- Perform the FFT-based convolution (parallel time search)
// Compute the FFT of the carrier wiped--off incoming signal
d_fft_if->execute();
// Multiply carrier wiped--off, Fourier transformed incoming signal
// with the local FFT'd code reference using SIMD operations with VOLK library
volk_32fc_x2_multiply_32fc_a(d_ifft->get_inbuf(),
d_fft_if->get_outbuf(), d_fft_codes, d_fft_size);
// compute the inverse FFT
d_ifft->execute();
// Search maximum
volk_32fc_magnitude_squared_32f_a(d_magnitude, d_ifft->get_outbuf(), d_fft_size);
volk_32f_s32f_multiply_32f_a(d_magnitude, d_magnitude,
1/(fft_normalization_factor*fft_normalization_factor*d_input_power),
d_fft_size);
volk_32f_x2_add_32f_a(d_grid_data[doppler_index], d_magnitude, d_grid_data[doppler_index], d_fft_size);
volk_32f_index_max_16u_a(&indext, d_grid_data[doppler_index], d_fft_size);
// Normalize the maximum value to correct the scale factor introduced by FFTW
magt = d_grid_data[doppler_index][indext];
// 4- record the maximum peak and the associated synchronization parameters
if (d_mag < magt)
{
d_mag = magt;
d_gnss_synchro->Acq_delay_samples = (double)(indext % d_samples_per_code);
d_gnss_synchro->Acq_doppler_hz = (double)doppler;
d_gnss_synchro->Acq_samplestamp_samples = d_sample_counter;
}
// Record results to file if required
if (d_dump)
{
std::stringstream filename;
std::streamsize n = 2 * sizeof(float) * (d_fft_size); // complex file write
filename.str("");
filename << "../data/test_statistics_" << d_gnss_synchro->System
<<"_" << d_gnss_synchro->Signal << "_sat_"
<< d_gnss_synchro->PRN << "_doppler_" << doppler << ".dat";
d_dump_file.open(filename.str().c_str(), std::ios::out | std::ios::binary);
d_dump_file.write((char*)d_ifft->get_outbuf(), n); //write directly |abs(x)|^2 in this Doppler bin?
d_dump_file.close();
}
}
// 5- Compute the test statistics and compare to the threshold
//d_test_statistics = 2 * d_fft_size * d_mag / d_input_power;
d_test_statistics = d_mag;
if (d_test_statistics > d_threshold*d_well_count)
{
d_tong_count++;
if (d_tong_count == d_tong_max_val)
{
d_state = 2; // Positive acquisition
}
}
else
{
d_tong_count--;
if (d_tong_count == 0)
{
d_state = 3; // Negative acquisition
}
}
consume_each(1);
break;
}
case 2:
{
// 6.1- Declare positive acquisition using a message queue
DLOG(INFO) << "positive acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
d_active = false;
d_state = 0;
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
acquisition_message = 1;
d_channel_internal_queue->push(acquisition_message);
break;
}
case 3:
{
// 6.2- Declare negative acquisition using a message queue
DLOG(INFO) << "negative acquisition";
DLOG(INFO) << "satellite " << d_gnss_synchro->System << " " << d_gnss_synchro->PRN;
DLOG(INFO) << "sample_stamp " << d_sample_counter;
DLOG(INFO) << "test statistics value " << d_test_statistics;
DLOG(INFO) << "test statistics threshold " << d_threshold;
DLOG(INFO) << "code phase " << d_gnss_synchro->Acq_delay_samples;
DLOG(INFO) << "doppler " << d_gnss_synchro->Acq_doppler_hz;
DLOG(INFO) << "magnitude " << d_mag;
DLOG(INFO) << "input signal power " << d_input_power;
d_active = false;
d_state = 0;
d_sample_counter += d_fft_size * ninput_items[0]; // sample counter
consume_each(ninput_items[0]);
acquisition_message = 2;
d_channel_internal_queue->push(acquisition_message);
break;
}
}
return 0;
}

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/*!
* \file pcps_tong_acquisition_cc.h
* \brief This class implements a Parallel Code Phase Search Acquisition with
* Tong algorithm.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* Acquisition strategy (Kaplan book + CFAR threshold).
* <ol>
* <li> Compute the input signal power estimation.
* <li> Doppler serial search loop.
* <li> Perform the FFT-based circular convolution (parallel time search).
* <li> Compute the tests statistics for all the cells.
* <li> Accumulate the grid of tests statistics with the previous grids.
* <li> Record the maximum peak and the associated synchronization parameters.
* <li> Compare the maximum averaged test statistics with a threshold.
* <li> If the test statistics exceeds the threshold, increment the Tong counter.
* <li> Otherwise, decrement the Tong counter.
* <li> If the Tong counter is equal to a given maximum value, declare positive
* <li> acquisition. If the Tong counter is equa to zero, declare negative
* <li> acquisition. Otherwise, process the next block.
* </ol>
*
* Kaplan book: D.Kaplan, J.Hegarty, "Understanding GPS. Principles
* and Applications", Artech House, 2006, pp 223-227
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GNSS_SDR_PCPS_TONG_acquisition_cc_H_
#define GNSS_SDR_PCPS_TONG_acquisition_cc_H_
#include <fstream>
#include <gnuradio/block.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/gr_complex.h>
#include <gnuradio/fft/fft.h>
#include <queue>
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include "concurrent_queue.h"
#include "gnss_synchro.h"
class pcps_tong_acquisition_cc;
typedef boost::shared_ptr<pcps_tong_acquisition_cc> pcps_tong_acquisition_cc_sptr;
pcps_tong_acquisition_cc_sptr
pcps_tong_make_acquisition_cc(unsigned int sampled_ms, unsigned int doppler_max,
long freq, long fs_in, int samples_per_ms,
int samples_per_code, unsigned int tong_init_val,
unsigned int tong_max_val, gr::msg_queue::sptr queue,
bool dump, std::string dump_filename);
/*!
* \brief This class implements a Parallel Code Phase Search Acquisition with
* Tong algorithm.
*/
class pcps_tong_acquisition_cc: public gr::block
{
private:
friend pcps_tong_acquisition_cc_sptr
pcps_tong_make_acquisition_cc(unsigned int sampled_ms, unsigned int doppler_max,
long freq, long fs_in, int samples_per_ms,
int samples_per_code, unsigned int tong_init_val,
unsigned int tong_max_val, gr::msg_queue::sptr queue,
bool dump, std::string dump_filename);
pcps_tong_acquisition_cc(unsigned int sampled_ms, unsigned int doppler_max,
long freq, long fs_in, int samples_per_ms,
int samples_per_code, unsigned int tong_init_val,
unsigned int tong_max_val, gr::msg_queue::sptr queue,
bool dump, std::string dump_filename);
void calculate_magnitudes(gr_complex* fft_begin, int doppler_shift,
int doppler_offset);
long d_fs_in;
long d_freq;
int d_samples_per_ms;
int d_samples_per_code;
unsigned int d_doppler_resolution;
float d_threshold;
std::string d_satellite_str;
unsigned int d_doppler_max;
unsigned int d_doppler_step;
unsigned int d_sampled_ms;
unsigned int d_well_count;
unsigned int d_tong_count;
unsigned int d_tong_init_val;
unsigned int d_tong_max_val;
unsigned int d_fft_size;
unsigned long int d_sample_counter;
gr_complex** d_grid_doppler_wipeoffs;
unsigned int d_num_doppler_bins;
gr_complex* d_fft_codes;
float** d_grid_data;
gr::fft::fft_complex* d_fft_if;
gr::fft::fft_complex* d_ifft;
Gnss_Synchro *d_gnss_synchro;
unsigned int d_code_phase;
float d_doppler_freq;
float d_mag;
float* d_magnitude;
float d_input_power;
float d_test_statistics;
gr::msg_queue::sptr d_queue;
concurrent_queue<int> *d_channel_internal_queue;
std::ofstream d_dump_file;
bool d_active;
int d_state;
bool d_dump;
unsigned int d_channel;
std::string d_dump_filename;
public:
/*!
* \brief Default destructor.
*/
~pcps_tong_acquisition_cc();
/*!
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
* to exchange synchronization data between acquisition and tracking blocks.
* \param p_gnss_synchro Satellite information shared by the processing blocks.
*/
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro)
{
d_gnss_synchro = p_gnss_synchro;
}
/*!
* \brief Returns the maximum peak of grid search.
*/
unsigned int mag()
{
return d_mag;
}
/*!
* \brief Initializes acquisition algorithm.
*/
void init();
/*!
* \brief Sets local code for TONG acquisition algorithm.
* \param code - Pointer to the PRN code.
*/
void set_local_code(std::complex<float> * code);
/*!
* \brief Starts acquisition algorithm, turning from standby mode to
* active mode
* \param active - bool that activates/deactivates the block.
*/
void set_active(bool active)
{
d_active = active;
}
/*!
* \brief Set acquisition channel unique ID
* \param channel - receiver channel.
*/
void set_channel(unsigned int channel)
{
d_channel = channel;
}
/*!
* \brief Set statistics threshold of TONG algorithm.
* \param threshold - Threshold for signal detection (check \ref Navitec2012,
* Algorithm 1, for a definition of this threshold).
*/
void set_threshold(float threshold)
{
d_threshold = threshold;
}
/*!
* \brief Set maximum Doppler grid search
* \param doppler_max - Maximum Doppler shift considered in the grid search [Hz].
*/
void set_doppler_max(unsigned int doppler_max)
{
d_doppler_max = doppler_max;
}
/*!
* \brief Set Doppler steps for the grid search
* \param doppler_step - Frequency bin of the search grid [Hz].
*/
void set_doppler_step(unsigned int doppler_step)
{
d_doppler_step = doppler_step;
}
/*!
* \brief Set tracking channel internal queue.
* \param channel_internal_queue - Channel's internal blocks information queue.
*/
void set_channel_queue(concurrent_queue<int> *channel_internal_queue)
{
d_channel_internal_queue = channel_internal_queue;
}
/*!
* \brief Parallel Code Phase Search Acquisition signal processing.
*/
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* GNSS_SDR_PCPS_TONG_acquisition_cc_H_ */

3
src/algorithms/libs/gps_sdr_signal_processing.h
View File

@ -40,6 +40,9 @@
//!Generates complex GPS L1 C/A code for the desired SV ID and code shift, and sampled to specific sampling frequency
void gps_l1_ca_code_gen_complex(std::complex<float>* _dest, signed int _prn, unsigned int _chip_shift);
//! Generates N complex GPS L1 C/A codes for the desired SV ID and code shift
void gps_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest, unsigned int _prn, signed int _fs, unsigned int _chip_shift, unsigned int _ncodes);
//! Generates complex GPS L1 C/A code for the desired SV ID and code shift
void gps_l1_ca_code_gen_complex_sampled(std::complex<float>* _dest, unsigned int _prn, signed int _fs, unsigned int _chip_shift);

2
src/algorithms/signal_generator/adapters/signal_generator.cc
View File

@ -1,6 +1,6 @@
/*!
* \file signal_generator.cc
* \brief Signal generator.
* \brief Adapter of a class that generates synthesized GNSS signal.
* \author Marc Molina, 2013. marc.molina.pena@gmail.com
*
*

71
src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc
View File

@ -1,5 +1,5 @@
/*!
* \file signal_generator_c.h
* \file signal_generator_c.cc
* \brief GNU Radio source block that generates synthesized GNSS signal.
* \author Marc Molina, 2013. marc.molina.pena@gmail.com
*
@ -27,9 +27,9 @@
*
* -------------------------------------------------------------------------
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
//#ifdef HAVE_CONFIG_H
//#include "config.h"
//#endif
#include "signal_generator_c.h"
#include <gnuradio/io_signature.h>
@ -73,7 +73,7 @@ signal_generator_c::signal_generator_c (std::vector<std::string> system, const s
fs_in_(fs_in),
num_sats_(PRN.size()),
vector_length_(vector_length),
BW_BB_(BW_BB*(float)fs_in/2)
BW_BB_(BW_BB*(float)fs_in/2.0)
{
init();
generate_codes();
@ -122,14 +122,14 @@ void signal_generator_c::init()
// for (unsigned int i = 0; i < num_sats_; i++)
// {
// std::cout << "Sat " << i << ": " << std::endl;
// std::cout << "System " << system_[i] << ": " << std::endl;
// std::cout << " System " << system_[i] << ": " << std::endl;
// std::cout << " PRN: " << PRN_[i] << std::endl;
// std::cout << " CN0: " << CN0_dB_[i] << std::endl;
// std::cout << " Doppler: " << doppler_Hz_[i] << std::endl;
// std::cout << " Delay: " << delay_chips_[i] << std::endl;
// std::cout << "Samples per code = " << samples_per_code_[i] << std::endl;
// std::cout << "codes per vector = " << num_of_codes_per_vector_[i] << std::endl;
// std::cout << "data_bit_duration = " << data_bit_duration_ms_[i] << std::endl;
// std::cout << " Samples per code = " << samples_per_code_[i] << std::endl;
// std::cout << " codes per vector = " << num_of_codes_per_vector_[i] << std::endl;
// std::cout << " data_bit_duration = " << data_bit_duration_ms_[i] << std::endl;
// }
}
@ -152,9 +152,12 @@ void signal_generator_c::generate_codes()
(int)GPS_L1_CA_CODE_LENGTH_CHIPS-delay_chips_[sat]);
// Obtain the desired CN0 assuming that Pn = 1.
for (unsigned int i = 0; i < samples_per_code_[sat]; i++)
if (noise_flag_)
{
code[i] *= sqrt(pow(10,CN0_dB_[sat]/10)/BW_BB_);
for (unsigned int i = 0; i < samples_per_code_[sat]; i++)
{
code[i] *= sqrt(pow(10,CN0_dB_[sat]/10)/BW_BB_);
}
}
// Concatenate "num_of_codes_per_vector_" codes
@ -175,9 +178,12 @@ void signal_generator_c::generate_codes()
(int)Galileo_E1_B_CODE_LENGTH_CHIPS-delay_chips_[sat]);
// Obtain the desired CN0 assuming that Pn = 1.
for (unsigned int i = 0; i < samples_per_code_[sat]; i++)
if (noise_flag_)
{
code[i] *= sqrt(pow(10,CN0_dB_[sat]/10)/BW_BB_/2);
for (unsigned int i = 0; i < samples_per_code_[sat]; i++)
{
code[i] *= sqrt(pow(10,CN0_dB_[sat]/10)/BW_BB_/2);
}
}
// Concatenate "num_of_codes_per_vector_" codes
@ -197,9 +203,12 @@ void signal_generator_c::generate_codes()
(int)Galileo_E1_B_CODE_LENGTH_CHIPS-delay_chips_[sat], true);
// Obtain the desired CN0 assuming that Pn = 1.
for (unsigned int i = 0; i < vector_length_; i++)
if (noise_flag_)
{
sampled_code_pilot_[sat][i] *= sqrt(pow(10,CN0_dB_[sat]/10)/BW_BB_/2);
for (unsigned int i = 0; i < vector_length_; i++)
{
sampled_code_pilot_[sat][i] *= sqrt(pow(10,CN0_dB_[sat]/10)/BW_BB_/2);
}
}
}
}
@ -257,21 +266,20 @@ signal_generator_c::general_work (int noutput_items,
for (i = 0; i < num_of_codes_per_vector_[sat]; i++)
{
gr_complex prev_data_bit = current_data_bits_[sat];
for (k = 0; k < delay_samples; k++)
{
out[out_idx] += sampled_code_data_[sat][out_idx]
* current_data_bits_[sat]
* complex_phase_[out_idx];
out_idx++;
}
if (ms_counter_[sat] == 0 && data_flag_)
{
// New random data bit
current_data_bits_[sat] = gr_complex((rand()%2) == 0 ? 1 : -1, 0);
}
for (k = 0; k < delay_samples; k++)
{
out[out_idx] += sampled_code_data_[sat][out_idx]
* prev_data_bit
* complex_phase_[out_idx];
out_idx++;
}
for (k = delay_samples; k < samples_per_code_[sat]; k++)
{
out[out_idx] += sampled_code_data_[sat][out_idx]
@ -292,21 +300,20 @@ signal_generator_c::general_work (int noutput_items,
for (i = 0; i < num_of_codes_per_vector_[sat]; i++)
{
gr_complex prev_data_bit = current_data_bits_[sat];
if (ms_counter_[sat] == 0 && data_flag_)
{
// New random data bit
current_data_bits_[sat] = gr_complex((rand()%2) == 0 ? -1 : 1, 0);
}
for (k = 0; k < delay_samples; k++)
{
out[out_idx] += (sampled_code_data_[sat][out_idx] * prev_data_bit
out[out_idx] += (sampled_code_data_[sat][out_idx] * current_data_bits_[sat]
- sampled_code_pilot_[sat][out_idx])
* complex_phase_[out_idx];
out_idx++;
}
if (ms_counter_[sat] == 0 && data_flag_)
{
// New random data bit
current_data_bits_[sat] = gr_complex((rand()%2) == 0 ? 1 : -1, 0);
}
for (k = delay_samples; k < samples_per_code_[sat]; k++)
{
out[out_idx] += (sampled_code_data_[sat][out_idx] * current_data_bits_[sat]

2
src/algorithms/signal_source/CMakeLists.txt
View File

@ -17,4 +17,4 @@
#
add_subdirectory(adapters)
#add_subdirectory(gnuradio_blocks)
#add_subdirectory(gnuradio_blocks)

33
src/core/receiver/gnss_block_factory.cc
View File

@ -54,9 +54,13 @@
#include "fir_filter.h"
#include "freq_xlating_fir_filter.h"
#include "gps_l1_ca_pcps_acquisition.h"
#include "gps_l1_ca_pcps_tong_acquisition.h"
#include "gps_l1_ca_pcps_assisted_acquisition.h"
#include "gps_l1_ca_pcps_acquisition_fine_doppler.h"
#include "galileo_e1_pcps_ambiguous_acquisition.h"
#include "galileo_e1_pcps_8ms_ambiguous_acquisition.h"
#include "galileo_e1_pcps_tong_ambiguous_acquisition.h"
#include "galileo_e1_pcps_cccwsr_ambiguous_acquisition.h"
#include "gps_l1_ca_dll_pll_tracking.h"
#include "gps_l1_ca_dll_pll_optim_tracking.h"
#include "gps_l1_ca_dll_fll_pll_tracking.h"
@ -332,9 +336,14 @@ GNSSBlockInterface* GNSSBlockFactory::GetBlock(
block = new GpsL1CaPcpsAssistedAcquisition(configuration, role, in_streams,
out_streams, queue);
}
else if (implementation.compare("Galileo_E1_PCPS_Ambiguous_Acquisition") == 0)
else if (implementation.compare("GPS_L1_CA_PCPS_Tong_Acquisition") == 0)
{
block = new GalileoE1PcpsAmbiguousAcquisition(configuration, role, in_streams,
block = new GpsL1CaPcpsTongAcquisition(configuration, role, in_streams,
out_streams, queue);
}
else if (implementation.compare("GPS_L1_CA_PCPS_Multithread_Acquisition") == 0)
{
block = new GpsL1CaPcpsAcquisition(configuration, role, in_streams,
out_streams, queue);
}
else if (implementation.compare("GPS_L1_CA_PCPS_Acquisition_Fine_Doppler") == 0)
@ -342,6 +351,26 @@ GNSSBlockInterface* GNSSBlockFactory::GetBlock(
block = new GpsL1CaPcpsAcquisitionFineDoppler(configuration, role, in_streams,
out_streams, queue);
}
else if (implementation.compare("Galileo_E1_PCPS_Ambiguous_Acquisition") == 0)
{
block = new GalileoE1PcpsAmbiguousAcquisition(configuration, role, in_streams,
out_streams, queue);
}
else if (implementation.compare("Galileo_E1_PCPS_8ms_Ambiguous_Acquisition") == 0)
{
block = new GalileoE1Pcps8msAmbiguousAcquisition(configuration, role, in_streams,
out_streams, queue);
}
else if (implementation.compare("Galileo_E1_PCPS_Tong_Ambiguous_Acquisition") == 0)
{
block = new GalileoE1PcpsTongAmbiguousAcquisition(configuration, role, in_streams,
out_streams, queue);
}
else if (implementation.compare("Galileo_E1_PCPS_CCCWSR_Ambiguous_Acquisition") == 0)
{
block = new GalileoE1PcpsCccwsrAmbiguousAcquisition(configuration, role, in_streams,
out_streams, queue);
}
// TRACKING BLOCKS -------------------------------------------------------------
else if (implementation.compare("GPS_L1_CA_DLL_PLL_Tracking") == 0)

15
src/tests/CMakeLists.txt
View File

@ -80,6 +80,8 @@ include_directories(
${CMAKE_SOURCE_DIR}/src/algorithms/tracking/adapters
${CMAKE_SOURCE_DIR}/src/algorithms/tracking/gnuradio_blocks
${CMAKE_SOURCE_DIR}/src/algorithms/signal_source/adapters
${CMAKE_SOURCE_DIR}/src/algorithms/signal_generator/adapters
${CMAKE_SOURCE_DIR}/src/algorithms/signal_generator/gnuradio_blocks
${CMAKE_SOURCE_DIR}/src/algorithms/input_filter/adapters
${CMAKE_SOURCE_DIR}/src/algorithms/acquisition/adapters
${CMAKE_SOURCE_DIR}/src/algorithms/acquisition/gnuradio_blocks
@ -97,7 +99,7 @@ find_library(
/usr/local/lib64
/usr/lib
/usr/lib64
)
)
add_executable(run_tests ${CMAKE_CURRENT_SOURCE_DIR}/test_main.cc)
@ -118,20 +120,27 @@ add_executable(control_thread_test EXCLUDE_FROM_ALL
${CMAKE_CURRENT_SOURCE_DIR}/control_thread/control_message_factory_test.cc
)
target_link_libraries(control_thread_test ${Boost_LIBRARIES} ${GFLAGS_LIBS} ${GLOG_LIBRARIES} ${GTEST_LIBRARIES} gnss_sp_libs gnss_rx)
add_test(control_thread_test control_thread_test)
add_test(control_thread_test control_thread_test)
add_executable(gnss_block_test EXCLUDE_FROM_ALL
${CMAKE_CURRENT_SOURCE_DIR}/single_test_main.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/file_signal_source_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/fir_filter_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/gps_l1_ca_pcps_acquisition_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/gps_l1_ca_pcps_acquisition_gsoc2013_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/gps_l1_ca_pcps_multithread_acquisition_gsoc2013_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/gps_l1_ca_pcps_tong_acquisition_gsoc2013_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/galileo_e1_pcps_ambiguous_acquisition_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/galileo_e1_pcps_ambiguous_acquisition_gsoc_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/galileo_e1_pcps_ambiguous_acquisition_gsoc2013_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/galileo_e1_pcps_8ms_ambiguous_acquisition_gsoc2013_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/galileo_e1_pcps_cccwsr_ambiguous_acquisition_gsoc2013_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/galileo_e1_pcps_tong_ambiguous_acquisition_gsoc2013_test.cc
#${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/galileo_e1_dll_pll_veml_tracking_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/file_output_filter_test.cc
${CMAKE_CURRENT_SOURCE_DIR}/gnss_block/gnss_block_factory_test.cc
)
target_link_libraries(gnss_block_test ${Boost_LIBRARIES} ${GFLAGS_LIBS} ${GLOG_LIBRARIES} ${GTEST_LIBRARIES} gnss_sp_libs gnss_rx)
add_test(gnss_block_test gnss_block_test)
add_test(gnss_block_test gnss_block_test)

577
src/tests/gnss_block/galileo_e1_pcps_8ms_ambiguous_acquisition_gsoc2013_test.cc Normal file
View File

@ -0,0 +1,577 @@
/*!
* \file galileo_e1_pcps_8ms_ambiguous_acquisition_gsoc2013_test.cc
* \brief This class implements an acquisition test for
* GalileoE1Pcps8msAmbiguousAcquisition class.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include <gtest/gtest.h>
#include <sys/time.h>
#include <iostream>
#include <gnuradio/top_block.h>
#include <gnuradio/blocks/file_source.h>
#include <gnuradio/analog/sig_source_waveform.h>
#include <gnuradio/analog/sig_source_c.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/null_sink.h>
#include "gnss_block_interface.h"
#include "in_memory_configuration.h"
#include "gnss_synchro.h"
#include "galileo_e1_pcps_8ms_ambiguous_acquisition.h"
#include "signal_generator.h"
//#include "signal_generator.cc"
#include "signal_generator_c.h"
//#include "signal_generator_c.cc"
#include "fir_filter.h"
#include "gen_signal_source.h"
#include "boost/shared_ptr.hpp"
#include "gnss_sdr_valve.h"
class GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test: public ::testing::Test
{
protected:
GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test()
{
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
item_size = sizeof(gr_complex);
stop = false;
message = 0;
}
~GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test()
{
}
void init();
void config_1();
void config_2();
void start_queue();
void wait_message();
void process_message();
void stop_queue();
gr::msg_queue::sptr queue;
gr::top_block_sptr top_block;
GalileoE1Pcps8msAmbiguousAcquisition *acquisition;
InMemoryConfiguration* config;
Gnss_Synchro gnss_synchro;
size_t item_size;
concurrent_queue<int> channel_internal_queue;
bool stop;
int message;
boost::thread ch_thread;
unsigned int integration_time_ms;
unsigned int fs_in;
double expected_delay_chips;
double expected_doppler_hz;
float max_doppler_error_hz;
float max_delay_error_chips;
unsigned int num_of_realizations;
unsigned int realization_counter;
unsigned int detection_counter;
unsigned int correct_estimation_counter;
unsigned int acquired_samples;
unsigned int mean_acq_time_us;
double mse_doppler;
double mse_delay;
double Pd;
double Pfa_p;
double Pfa_a;
};
void GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test::init()
{
message = 0;
realization_counter = 0;
detection_counter = 0;
correct_estimation_counter = 0;
acquired_samples = 0;
mse_doppler = 0;
mse_delay = 0;
mean_acq_time_us = 0;
Pd = 0;
Pfa_p = 0;
Pfa_a = 0;
}
void GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test::config_1()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'E';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 8;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 1;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "1");
config->set_property("SignalSource.system_0", "E");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0",
std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0",
std::to_string(expected_delay_chips));
config->set_property("SignalSource.noise_flag", "false");
config->set_property("SignalSource.data_flag", "false");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.max_dwells", "1");
config->set_property("Acquisition.implementation", "Galileo_E1_PCPS_8ms_Ambiguous_Acquisition");
config->set_property("Acquisition.threshold", "0.2");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.dump", "false");
}
void GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test::config_2()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'E';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 8;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 100;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "4");
config->set_property("SignalSource.system_0", "E");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0",
std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0",
std::to_string(expected_delay_chips));
config->set_property("SignalSource.system_1", "E");
config->set_property("SignalSource.PRN_1", "15");
config->set_property("SignalSource.CN0_dB_1", "44");
config->set_property("SignalSource.doppler_Hz_1", "1000");
config->set_property("SignalSource.delay_chips_1", "100");
config->set_property("SignalSource.system_2", "G");
config->set_property("SignalSource.PRN_2", "10");
config->set_property("SignalSource.CN0_dB_2", "44");
config->set_property("SignalSource.doppler_Hz_2", "2000");
config->set_property("SignalSource.delay_chips_2", "200");
config->set_property("SignalSource.system_3", "G");
config->set_property("SignalSource.PRN_3", "20");
config->set_property("SignalSource.CN0_dB_3", "44");
config->set_property("SignalSource.doppler_Hz_3", "3000");
config->set_property("SignalSource.delay_chips_3", "300");
config->set_property("SignalSource.noise_flag", "true");
config->set_property("SignalSource.data_flag", "true");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.max_dwells", "1");
config->set_property("Acquisition.implementation", "Galileo_E1_PCPS_8ms_Ambiguous_Acquisition");
config->set_property("Acquisition.pfa", "1e-1");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.dump", "false");
}
void GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test::start_queue()
{
stop = false;
ch_thread = boost::thread(&GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test::wait_message, this);
}
void GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test::wait_message()
{
struct timeval tv;
long long int begin = 0;
long long int end = 0;
while (!stop)
{
acquisition->reset();
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
channel_internal_queue.wait_and_pop(message);
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
mean_acq_time_us += (end-begin);
process_message();
}
}
void GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test::process_message()
{
if (message == 1)
{
detection_counter++;
// The term -5 is here to correct the additional delay introduced by the FIR filter
double delay_error_chips = abs((double)expected_delay_chips - (double)(gnss_synchro.Acq_delay_samples-5)*1023.0/((double)fs_in*1e-3));
double doppler_error_hz = abs(expected_doppler_hz - gnss_synchro.Acq_doppler_hz);
mse_delay += std::pow(delay_error_chips, 2);
mse_doppler += std::pow(doppler_error_hz, 2);
if ((delay_error_chips < max_delay_error_chips) && (doppler_error_hz < max_doppler_error_hz))
{
correct_estimation_counter++;
}
}
realization_counter++;
std::cout << "Progress: " << round((float)realization_counter/num_of_realizations*100) << "% \r" << std::flush;
if (realization_counter == num_of_realizations)
{
mse_delay /= num_of_realizations;
mse_doppler /= num_of_realizations;
Pd = (double)correct_estimation_counter / (double)num_of_realizations;
Pfa_a = (double)detection_counter / (double)num_of_realizations;
Pfa_p = (double)(detection_counter-correct_estimation_counter) / (double)num_of_realizations;
mean_acq_time_us /= num_of_realizations;
stop_queue();
top_block->stop();
std::cout << std::endl;
}
}
void GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test::stop_queue()
{
stop = true;
}
TEST_F(GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test, Instantiate)
{
config_1();
acquisition = new GalileoE1Pcps8msAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
delete acquisition;
delete config;
}
TEST_F(GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test, ConnectAndRun)
{
int nsamples = floor(fs_in*integration_time_ms*1e-3);
struct timeval tv;
long long int begin = 0;
long long int end = 0;
config_1();
acquisition = new GalileoE1Pcps8msAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->connect(top_block);
boost::shared_ptr<gr::analog::sig_source_c> source = gr::analog::sig_source_c::make(fs_in, gr::analog::GR_SIN_WAVE, 1000, 1, gr_complex(0));
boost::shared_ptr<gr::block> valve = gnss_sdr_make_valve(sizeof(gr_complex), nsamples, queue);
top_block->connect(source, 0, valve, 0);
top_block->connect(valve, 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test."<< std::endl;
EXPECT_NO_THROW( {
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
top_block->run(); // Start threads and wait
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
}) << "Failure running he top_block."<< std::endl;
std::cout << "Processed " << nsamples << " samples in " << (end-begin) << " microseconds" << std::endl;
delete acquisition;
delete config;
}
TEST_F(GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test, ValidationOfResults)
{
config_1();
acquisition = new GalileoE1Pcps8msAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
// i = 0 --> sallite in acquisition is visible
// i = 1 --> satellite in acquisition is not visible
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
EXPECT_EQ(1, message) << "Acquisition failure. Expected message: 1=ACQ SUCCESS.";
if (message == 1)
{
EXPECT_EQ(1, correct_estimation_counter) << "Acquisition failure. Incorrect parameters estimation.";
}
}
else if (i == 1)
{
EXPECT_EQ(2, message) << "Acquisition failure. Expected message: 2=ACQ FAIL.";
}
}
delete acquisition;
delete config;
}
TEST_F(GalileoE1Pcps8msAmbiguousAcquisitionGSoC2013Test, ValidationOfResultsProbabilities)
{
config_2();
acquisition = new GalileoE1Pcps8msAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
std::cout << "Probability of false alarm (target) = " << 0.1 << std::endl;
// i = 0 --> sallite in acquisition is visible (prob of detection and prob of detection with wrong estimation)
// i = 1 --> satellite in acquisition is not visible (prob of false detection)
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
std::cout << "Probability of detection = " << Pd << std::endl;
std::cout << "Probability of false alarm (satellite present) = " << Pfa_p << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
else if (i == 1)
{
std::cout << "Probability of false alarm (satellite absent) = " << Pfa_a << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
}
delete acquisition;
delete config;
}

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/*!
* \file galileo_e1_pcps_ambiguous_acquisition_gsoc2013_test.cc
* \brief This class implements an acquisition test for
* GalileoE1PcpsAmbiguousAcquisition class.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include <gtest/gtest.h>
#include <sys/time.h>
#include <iostream>
#include <gnuradio/top_block.h>
#include <gnuradio/blocks/file_source.h>
#include <gnuradio/analog/sig_source_waveform.h>
#include <gnuradio/analog/sig_source_c.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/null_sink.h>
#include "gnss_block_interface.h"
#include "in_memory_configuration.h"
#include "gnss_synchro.h"
#include "galileo_e1_pcps_ambiguous_acquisition.h"
#include "signal_generator.h"
//#include "signal_generator.cc"
#include "signal_generator_c.h"
//#include "signal_generator_c.cc"
#include "fir_filter.h"
#include "gen_signal_source.h"
#include "boost/shared_ptr.hpp"
#include "gnss_sdr_valve.h"
class GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test: public ::testing::Test
{
protected:
GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test()
{
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
item_size = sizeof(gr_complex);
stop = false;
message = 0;
}
~GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test()
{
}
void init();
void config_1();
void config_2();
void start_queue();
void wait_message();
void process_message();
void stop_queue();
gr::msg_queue::sptr queue;
gr::top_block_sptr top_block;
GalileoE1PcpsAmbiguousAcquisition *acquisition;
InMemoryConfiguration* config;
Gnss_Synchro gnss_synchro;
size_t item_size;
concurrent_queue<int> channel_internal_queue;
bool stop;
int message;
boost::thread ch_thread;
unsigned int integration_time_ms;
unsigned int fs_in;
double expected_delay_chips;
double expected_doppler_hz;
float max_doppler_error_hz;
float max_delay_error_chips;
unsigned int num_of_realizations;
unsigned int realization_counter;
unsigned int detection_counter;
unsigned int correct_estimation_counter;
unsigned int acquired_samples;
unsigned int mean_acq_time_us;
double mse_doppler;
double mse_delay;
double Pd;
double Pfa_p;
double Pfa_a;
};
void GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test::init()
{
message = 0;
realization_counter = 0;
detection_counter = 0;
correct_estimation_counter = 0;
acquired_samples = 0;
mse_doppler = 0;
mse_delay = 0;
mean_acq_time_us = 0;
Pd = 0;
Pfa_p = 0;
Pfa_a = 0;
}
void GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test::config_1()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'E';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 4;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 1;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "1");
config->set_property("SignalSource.system_0", "E");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0",
std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0",
std::to_string(expected_delay_chips));
config->set_property("SignalSource.noise_flag", "false");
config->set_property("SignalSource.data_flag", "false");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.max_dwells", "1");
config->set_property("Acquisition.bit_transition_flag","false");
config->set_property("Acquisition.implementation", "Galileo_E1_PCPS_Ambiguous_Acquisition");
config->set_property("Acquisition.threshold", "0.3");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.dump", "false");
}
void GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test::config_2()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'E';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 4;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 100;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "4");
config->set_property("SignalSource.system_0", "E");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0",
std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0",
std::to_string(expected_delay_chips));
config->set_property("SignalSource.system_1", "E");
config->set_property("SignalSource.PRN_1", "15");
config->set_property("SignalSource.CN0_dB_1", "44");
config->set_property("SignalSource.doppler_Hz_1", "1000");
config->set_property("SignalSource.delay_chips_1", "100");
config->set_property("SignalSource.system_2", "G");
config->set_property("SignalSource.PRN_2", "10");
config->set_property("SignalSource.CN0_dB_2", "44");
config->set_property("SignalSource.doppler_Hz_2", "2000");
config->set_property("SignalSource.delay_chips_2", "200");
config->set_property("SignalSource.system_3", "G");
config->set_property("SignalSource.PRN_3", "20");
config->set_property("SignalSource.CN0_dB_3", "44");
config->set_property("SignalSource.doppler_Hz_3", "3000");
config->set_property("SignalSource.delay_chips_3", "300");
config->set_property("SignalSource.noise_flag", "true");
config->set_property("SignalSource.data_flag", "true");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.max_dwells", "1");
config->set_property("Acquisition.bit_transition_flag","false");
config->set_property("Acquisition.implementation", "Galileo_E1_PCPS_Ambiguous_Acquisition");
config->set_property("Acquisition.pfa", "1e-1");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.dump", "false");
}
void GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test::start_queue()
{
stop = false;
ch_thread = boost::thread(&GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test::wait_message, this);
}
void GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test::wait_message()
{
struct timeval tv;
long long int begin = 0;
long long int end = 0;
while (!stop)
{
acquisition->reset();
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
channel_internal_queue.wait_and_pop(message);
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
mean_acq_time_us += (end-begin);
process_message();
}
}
void GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test::process_message()
{
if (message == 1)
{
detection_counter++;
// The term -5 is here to correct the additional delay introduced by the FIR filter
double delay_error_chips = abs((double)expected_delay_chips - (double)(gnss_synchro.Acq_delay_samples-5)*1023.0/((double)fs_in*1e-3));
double doppler_error_hz = abs(expected_doppler_hz - gnss_synchro.Acq_doppler_hz);
mse_delay += std::pow(delay_error_chips, 2);
mse_doppler += std::pow(doppler_error_hz, 2);
if ((delay_error_chips < max_delay_error_chips) && (doppler_error_hz < max_doppler_error_hz))
{
correct_estimation_counter++;
}
}
realization_counter++;
std::cout << "Progress: " << round((float)realization_counter/num_of_realizations*100) << "% \r" << std::flush;
if (realization_counter == num_of_realizations)
{
mse_delay /= num_of_realizations;
mse_doppler /= num_of_realizations;
Pd = (double)correct_estimation_counter / (double)num_of_realizations;
Pfa_a = (double)detection_counter / (double)num_of_realizations;
Pfa_p = (double)(detection_counter-correct_estimation_counter) / (double)num_of_realizations;
mean_acq_time_us /= num_of_realizations;
stop_queue();
top_block->stop();
std::cout << std::endl;
}
}
void GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test::stop_queue()
{
stop = true;
}
TEST_F(GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test, Instantiate)
{
config_1();
acquisition = new GalileoE1PcpsAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
delete acquisition;
delete config;
}
TEST_F(GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test, ConnectAndRun)
{
int nsamples = floor(fs_in*integration_time_ms*1e-3);
struct timeval tv;
long long int begin = 0;
long long int end = 0;
config_1();
acquisition = new GalileoE1PcpsAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->connect(top_block);
boost::shared_ptr<gr::analog::sig_source_c> source = gr::analog::sig_source_c::make(fs_in, gr::analog::GR_SIN_WAVE, 1000, 1, gr_complex(0));
boost::shared_ptr<gr::block> valve = gnss_sdr_make_valve(sizeof(gr_complex), nsamples, queue);
top_block->connect(source, 0, valve, 0);
top_block->connect(valve, 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test."<< std::endl;
EXPECT_NO_THROW( {
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
top_block->run(); // Start threads and wait
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
}) << "Failure running he top_block."<< std::endl;
std::cout << "Processed " << nsamples << " samples in " << (end-begin) << " microseconds" << std::endl;
delete acquisition;
delete config;
}
TEST_F(GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test, ValidationOfResults)
{
config_1();
acquisition = new GalileoE1PcpsAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
// i = 0 --> sallite in acquisition is visible
// i = 1 --> satellite in acquisition is not visible
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
EXPECT_EQ(1, message) << "Acquisition failure. Expected message: 1=ACQ SUCCESS.";
if (message == 1)
{
EXPECT_EQ(1, correct_estimation_counter) << "Acquisition failure. Incorrect parameters estimation.";
}
}
else if (i == 1)
{
EXPECT_EQ(2, message) << "Acquisition failure. Expected message: 2=ACQ FAIL.";
}
}
delete acquisition;
delete config;
}
TEST_F(GalileoE1PcpsAmbiguousAcquisitionGSoC2013Test, ValidationOfResultsProbabilities)
{
config_2();
acquisition = new GalileoE1PcpsAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
std::cout << "Probability of false alarm (target) = " << 0.1 << std::endl;
// i = 0 --> sallite in acquisition is visible (prob of detection and prob of detection with wrong estimation)
// i = 1 --> satellite in acquisition is not visible (prob of false detection)
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
std::cout << "Probability of detection = " << Pd << std::endl;
std::cout << "Probability of false alarm (satellite present) = " << Pfa_p << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
else if (i == 1)
{
std::cout << "Probability of false alarm (satellite absent) = " << Pfa_a << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
}
delete acquisition;
delete config;
}

2
src/tests/gnss_block/galileo_e1_pcps_ambiguous_acquisition_gsoc_test.cc
View File

@ -111,7 +111,7 @@ void GalileoE1PcpsAmbiguousAcquisitionGSoCTest::init()
config->set_property("GNSS-SDR.internal_fs_hz", "4000000");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.sampled_ms", "4");
config->set_property("Acquisition.coherent_integration_time_ms", "4");
config->set_property("Acquisition.dump", "false");
config->set_property("Acquisition.implementation", "Galileo_E1_PCPS_Ambiguous_Acquisition");
config->set_property("Acquisition.threshold", "50");

2
src/tests/gnss_block/galileo_e1_pcps_ambiguous_acquisition_test.cc
View File

@ -98,7 +98,7 @@ void GalileoE1PcpsAmbiguousAcquisitionTest::init()
config->set_property("GNSS-SDR.internal_fs_hz", "4000000");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.sampled_ms", "4");
config->set_property("Acquisition.coherent_integration_time_ms", "4");
config->set_property("Acquisition.dump", "false");
config->set_property("Acquisition.implementation", "Galileo_E1_PCPS_Ambiguous_Acquisition");
config->set_property("Acquisition.threshold", "0.005");

579
src/tests/gnss_block/galileo_e1_pcps_cccwsr_ambiguous_acquisition_gsoc2013_test.cc Normal file
View File

@ -0,0 +1,579 @@
/*!
* \file galileo_e1_pcps_cccwsr_ambiguous_acquisition_gsoc2013_test.cc
* \brief This class implements an acquisition test for
* GalileoE1PcpsCccwsrAmbiguousAcquisition class.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include <gtest/gtest.h>
#include <sys/time.h>
#include <iostream>
#include <gnuradio/top_block.h>
#include <gnuradio/blocks/file_source.h>
#include <gnuradio/analog/sig_source_waveform.h>
#include <gnuradio/analog/sig_source_c.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/null_sink.h>
#include "gnss_block_interface.h"
#include "in_memory_configuration.h"
#include "gnss_synchro.h"
#include "galileo_e1_pcps_cccwsr_ambiguous_acquisition.h"
#include "signal_generator.h"
//#include "signal_generator.cc"
#include "signal_generator_c.h"
//#include "signal_generator_c.cc"
#include "fir_filter.h"
#include "gen_signal_source.h"
#include "boost/shared_ptr.hpp"
#include "gnss_sdr_valve.h"
class GalileoE1PcpsCccwsrAmbiguousAcquisitionTest: public ::testing::Test
{
protected:
GalileoE1PcpsCccwsrAmbiguousAcquisitionTest()
{
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
item_size = sizeof(gr_complex);
stop = false;
message = 0;
}
~GalileoE1PcpsCccwsrAmbiguousAcquisitionTest()
{
}
void init();
void config_1();
void config_2();
void start_queue();
void wait_message();
void process_message();
void stop_queue();
gr::msg_queue::sptr queue;
gr::top_block_sptr top_block;
GalileoE1PcpsCccwsrAmbiguousAcquisition *acquisition;
InMemoryConfiguration* config;
Gnss_Synchro gnss_synchro;
size_t item_size;
concurrent_queue<int> channel_internal_queue;
bool stop;
int message;
boost::thread ch_thread;
unsigned int integration_time_ms;
unsigned int fs_in;
double expected_delay_chips;
double expected_doppler_hz;
float max_doppler_error_hz;
float max_delay_error_chips;
unsigned int num_of_realizations;
unsigned int realization_counter;
unsigned int detection_counter;
unsigned int correct_estimation_counter;
unsigned int acquired_samples;
unsigned int mean_acq_time_us;
double mse_doppler;
double mse_delay;
double Pd;
double Pfa_p;
double Pfa_a;
};
void GalileoE1PcpsCccwsrAmbiguousAcquisitionTest::init()
{
message = 0;
realization_counter = 0;
detection_counter = 0;
correct_estimation_counter = 0;
acquired_samples = 0;
mse_doppler = 0;
mse_delay = 0;
mean_acq_time_us = 0;
Pd = 0;
Pfa_p = 0;
Pfa_a = 0;
}
void GalileoE1PcpsCccwsrAmbiguousAcquisitionTest::config_1()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'E';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 4;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 1;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "1");
config->set_property("SignalSource.system_0", "E");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0",
std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0",
std::to_string(expected_delay_chips));
config->set_property("SignalSource.noise_flag", "false");
config->set_property("SignalSource.data_flag", "false");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.max_dwells", "1");
config->set_property("Acquisition.implementation", "Galileo_E1_PCPS_CCCWSR_Ambiguous_Acquisition");
config->set_property("Acquisition.threshold", "0.7");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.dump", "false");
}
void GalileoE1PcpsCccwsrAmbiguousAcquisitionTest::config_2()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'E';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 4;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 100;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "4");
config->set_property("SignalSource.system_0", "E");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0",
std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0",
std::to_string(expected_delay_chips));
config->set_property("SignalSource.system_1", "E");
config->set_property("SignalSource.PRN_1", "15");
config->set_property("SignalSource.CN0_dB_1", "44");
config->set_property("SignalSource.doppler_Hz_1", "1000");
config->set_property("SignalSource.delay_chips_1", "100");
config->set_property("SignalSource.system_2", "G");
config->set_property("SignalSource.PRN_2", "10");
config->set_property("SignalSource.CN0_dB_2", "44");
config->set_property("SignalSource.doppler_Hz_2", "2000");
config->set_property("SignalSource.delay_chips_2", "200");
config->set_property("SignalSource.system_3", "G");
config->set_property("SignalSource.PRN_3", "20");
config->set_property("SignalSource.CN0_dB_3", "44");
config->set_property("SignalSource.doppler_Hz_3", "3000");
config->set_property("SignalSource.delay_chips_3", "300");
config->set_property("SignalSource.noise_flag", "true");
config->set_property("SignalSource.data_flag", "true");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.max_dwells", "1");
config->set_property("Acquisition.implementation", "Galileo_E1_PCPS_CCCWSR_Ambiguous_Acquisition");
config->set_property("Acquisition.threshold", "0.0025");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.dump", "false");
}
void GalileoE1PcpsCccwsrAmbiguousAcquisitionTest::start_queue()
{
stop = false;
ch_thread = boost::thread(&GalileoE1PcpsCccwsrAmbiguousAcquisitionTest::wait_message, this);
}
void GalileoE1PcpsCccwsrAmbiguousAcquisitionTest::wait_message()
{
struct timeval tv;
long long int begin = 0;
long long int end = 0;
while (!stop)
{
acquisition->reset();
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
channel_internal_queue.wait_and_pop(message);
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
mean_acq_time_us += (end-begin);
process_message();
}
}
void GalileoE1PcpsCccwsrAmbiguousAcquisitionTest::process_message()
{
if (message == 1)
{
detection_counter++;
// The term -5 is here to correct the additional delay introduced by the FIR filter
double delay_error_chips = abs((double)expected_delay_chips - (double)(gnss_synchro.Acq_delay_samples-5)*1023.0/((double)fs_in*1e-3));
double doppler_error_hz = abs(expected_doppler_hz - gnss_synchro.Acq_doppler_hz);
mse_delay += std::pow(delay_error_chips, 2);
mse_doppler += std::pow(doppler_error_hz, 2);
if ((delay_error_chips < max_delay_error_chips) && (doppler_error_hz < max_doppler_error_hz))
{
correct_estimation_counter++;
}
}
realization_counter++;
std::cout << "Progress: " << round((float)realization_counter/num_of_realizations*100) << "% \r" << std::flush;
if (realization_counter == num_of_realizations)
{
mse_delay /= num_of_realizations;
mse_doppler /= num_of_realizations;
Pd = (double)correct_estimation_counter / (double)num_of_realizations;
Pfa_a = (double)detection_counter / (double)num_of_realizations;
Pfa_p = (double)(detection_counter-correct_estimation_counter) / (double)num_of_realizations;
mean_acq_time_us /= num_of_realizations;
stop_queue();
top_block->stop();
std::cout << std::endl;
}
}
void GalileoE1PcpsCccwsrAmbiguousAcquisitionTest::stop_queue()
{
stop = true;
}
TEST_F(GalileoE1PcpsCccwsrAmbiguousAcquisitionTest, Instantiate)
{
config_1();
acquisition = new GalileoE1PcpsCccwsrAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
delete acquisition;
delete config;
}
TEST_F(GalileoE1PcpsCccwsrAmbiguousAcquisitionTest, ConnectAndRun)
{
int nsamples = floor(fs_in*integration_time_ms*1e-3);
struct timeval tv;
long long int begin = 0;
long long int end = 0;
config_1();
acquisition = new GalileoE1PcpsCccwsrAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->connect(top_block);
boost::shared_ptr<gr::analog::sig_source_c> source = gr::analog::sig_source_c::make(fs_in, gr::analog::GR_SIN_WAVE, 1000, 1, gr_complex(0));
boost::shared_ptr<gr::block> valve = gnss_sdr_make_valve(sizeof(gr_complex), nsamples, queue);
top_block->connect(source, 0, valve, 0);
top_block->connect(valve, 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test."<< std::endl;
EXPECT_NO_THROW( {
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
top_block->run(); // Start threads and wait
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
}) << "Failure running he top_block."<< std::endl;
std::cout << "Processed " << nsamples << " samples in " << (end-begin) << " microseconds" << std::endl;
delete acquisition;
delete config;
}
TEST_F(GalileoE1PcpsCccwsrAmbiguousAcquisitionTest, ValidationOfResults)
{
config_1();
acquisition = new GalileoE1PcpsCccwsrAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
// i = 0 --> sallite in acquisition is visible
// i = 1 --> satellite in acquisition is not visible
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
EXPECT_EQ(1, message) << "Acquisition failure. Expected message: 1=ACQ SUCCESS.";
if (message == 1)
{
EXPECT_EQ(1, correct_estimation_counter) << "Acquisition failure. Incorrect parameters estimation.";
}
}
else if (i == 1)
{
EXPECT_EQ(2, message) << "Acquisition failure. Expected message: 2=ACQ FAIL.";
}
}
delete acquisition;
delete config;
}
TEST_F(GalileoE1PcpsCccwsrAmbiguousAcquisitionTest, ValidationOfResultsProbabilities)
{
config_2();
acquisition = new GalileoE1PcpsCccwsrAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
std::cout << "Probability of false alarm (target) = " << 0.0065 << std::endl;
// i = 0 --> sallite in acquisition is visible (prob of detection and prob of detection with wrong estimation)
// i = 1 --> satellite in acquisition is not visible (prob of false detection)
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
std::cout << "Probability of detection = " << Pd << std::endl;
std::cout << "Probability of false alarm (satellite present) = " << Pfa_p << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
else if (i == 1)
{
std::cout << "Probability of false alarm (satellite absent) = " << Pfa_a << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
}
delete acquisition;
delete config;
}

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/*!
* \file galileo_e1_pcps_tong_ambiguous_acquisition_gsoc2013_test.cc
* \brief This class implements an acquisition test for
* GalileoE1PcpsTongAmbiguousAcquisition class.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com *
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include <gtest/gtest.h>
#include <sys/time.h>
#include <iostream>
#include <gnuradio/top_block.h>
#include <gnuradio/blocks/file_source.h>
#include <gnuradio/analog/sig_source_waveform.h>
#include <gnuradio/analog/sig_source_c.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/null_sink.h>
#include "gnss_block_interface.h"
#include "in_memory_configuration.h"
#include "configuration_interface.h"
#include "gnss_synchro.h"
#include "galileo_e1_pcps_tong_ambiguous_acquisition.h"
#include "signal_generator.h"
//#include "signal_generator.cc"
#include "signal_generator_c.h"
//#include "signal_generator_c.cc"
#include "fir_filter.h"
#include "gen_signal_source.h"
#include "gnss_sdr_valve.h"
#include "boost/shared_ptr.hpp"
class GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test: public ::testing::Test
{
protected:
GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test()
{
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
item_size = sizeof(gr_complex);
stop = false;
message = 0;
}
~GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test()
{
}
void init();
void config_1();
void config_2();
void start_queue();
void wait_message();
void process_message();
void stop_queue();
gr::msg_queue::sptr queue;
gr::top_block_sptr top_block;
GalileoE1PcpsTongAmbiguousAcquisition *acquisition;
InMemoryConfiguration* config;
Gnss_Synchro gnss_synchro;
size_t item_size;
concurrent_queue<int> channel_internal_queue;
bool stop;
int message;
boost::thread ch_thread;
unsigned int integration_time_ms;
unsigned int fs_in;
double expected_delay_chips;
double expected_doppler_hz;
float max_doppler_error_hz;
float max_delay_error_chips;
unsigned int num_of_realizations;
unsigned int realization_counter;
unsigned int detection_counter;
unsigned int correct_estimation_counter;
unsigned int acquired_samples;
unsigned int mean_acq_time_us;
double mse_doppler;
double mse_delay;
double Pd;
double Pfa_p;
double Pfa_a;
};
void GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test::init()
{
message = 0;
realization_counter = 0;
detection_counter = 0;
correct_estimation_counter = 0;
acquired_samples = 0;
mse_doppler = 0;
mse_delay = 0;
mean_acq_time_us = 0;
Pd = 0;
Pfa_p = 0;
Pfa_a = 0;
}
void GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test::config_1()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'E';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 4;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 1;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "1");
config->set_property("SignalSource.system_0", "E");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0",
std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0",
std::to_string(expected_delay_chips));
config->set_property("SignalSource.noise_flag", "false");
config->set_property("SignalSource.data_flag", "false");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.tong_init_val", "5");
config->set_property("Acquisition.tong_max_val", "10");
config->set_property("Acquisition.implementation", "Galileo_E1_PCPS_Tong_Ambiguous_Acquisition");
config->set_property("Acquisition.threshold", "0.3");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.dump", "false");
}
void GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test::config_2()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'E';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 4;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 100;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "4");
config->set_property("SignalSource.system_0", "E");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0",
std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0",
std::to_string(expected_delay_chips));
config->set_property("SignalSource.system_1", "E");
config->set_property("SignalSource.PRN_1", "15");
config->set_property("SignalSource.CN0_dB_1", "44");
config->set_property("SignalSource.doppler_Hz_1", "1000");
config->set_property("SignalSource.delay_chips_1", "100");
config->set_property("SignalSource.system_2", "G");
config->set_property("SignalSource.PRN_2", "10");
config->set_property("SignalSource.CN0_dB_2", "44");
config->set_property("SignalSource.doppler_Hz_2", "2000");
config->set_property("SignalSource.delay_chips_2", "200");
config->set_property("SignalSource.system_3", "G");
config->set_property("SignalSource.PRN_3", "20");
config->set_property("SignalSource.CN0_dB_3", "44");
config->set_property("SignalSource.doppler_Hz_3", "3000");
config->set_property("SignalSource.delay_chips_3", "300");
config->set_property("SignalSource.noise_flag", "true");
config->set_property("SignalSource.data_flag", "true");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.tong_init_val", "5");
config->set_property("Acquisition.tong_max_val", "10");
config->set_property("Acquisition.implementation", "Galileo_E1_PCPS_Tong_Ambiguous_Acquisition");
config->set_property("Acquisition.threshold", "0.0005");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.dump", "false");
}
void GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test::start_queue()
{
stop = false;
ch_thread = boost::thread(&GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test::wait_message, this);
}
void GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test::wait_message()
{
struct timeval tv;
long long int begin = 0;
long long int end = 0;
while (!stop)
{
acquisition->reset();
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
channel_internal_queue.wait_and_pop(message);
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
mean_acq_time_us += (end-begin);
process_message();
}
}
void GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test::process_message()
{
if (message == 1)
{
detection_counter++;
// The term -5 is here to correct the additional delay introduced by the FIR filter
double delay_error_chips = abs((double)expected_delay_chips - (double)(gnss_synchro.Acq_delay_samples-5)*1023.0/((double)fs_in*1e-3));
double doppler_error_hz = abs(expected_doppler_hz - gnss_synchro.Acq_doppler_hz);
mse_delay += std::pow(delay_error_chips, 2);
mse_doppler += std::pow(doppler_error_hz, 2);
if ((delay_error_chips < max_delay_error_chips) && (doppler_error_hz < max_doppler_error_hz))
{
correct_estimation_counter++;
}
}
realization_counter++;
std::cout << "Progress: " << round((float)realization_counter/num_of_realizations*100) << "% \r" << std::flush;
if (realization_counter == num_of_realizations)
{
mse_delay /= num_of_realizations;
mse_doppler /= num_of_realizations;
Pd = (double)correct_estimation_counter / (double)num_of_realizations;
Pfa_a = (double)detection_counter / (double)num_of_realizations;
Pfa_p = (double)(detection_counter-correct_estimation_counter) / (double)num_of_realizations;
mean_acq_time_us /= num_of_realizations;
stop_queue();
top_block->stop();
std::cout << std::endl;
}
}
void GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test::stop_queue()
{
stop = true;
}
TEST_F(GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test, Instantiate)
{
config_1();
acquisition = new GalileoE1PcpsTongAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
delete acquisition;
delete config;
}
TEST_F(GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test, ConnectAndRun)
{
int nsamples = floor(fs_in*integration_time_ms*1e-3);
struct timeval tv;
long long int begin = 0;
long long int end = 0;
config_1();
acquisition = new GalileoE1PcpsTongAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->connect(top_block);
boost::shared_ptr<gr::analog::sig_source_c> source = gr::analog::sig_source_c::make(fs_in, gr::analog::GR_SIN_WAVE, 1000, 1, gr_complex(0));
boost::shared_ptr<gr::block> valve = gnss_sdr_make_valve(sizeof(gr_complex), nsamples, queue);
top_block->connect(source, 0, valve, 0);
top_block->connect(valve, 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test."<< std::endl;
EXPECT_NO_THROW( {
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
top_block->run(); // Start threads and wait
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
}) << "Failure running the top_block."<< std::endl;
std::cout << "Processed " << nsamples << " samples in " << (end-begin) << " microseconds" << std::endl;
delete acquisition;
delete config;
}
TEST_F(GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test, ValidationOfResults)
{
config_1();
acquisition = new GalileoE1PcpsTongAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
// i = 0 --> sallite in acquisition is visible
// i = 1 --> satellite in acquisition is not visible
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
EXPECT_EQ(1, message) << "Acquisition failure. Expected message: 1=ACQ SUCCESS.";
if (message == 1)
{
EXPECT_EQ(1, correct_estimation_counter) << "Acquisition failure. Incorrect parameters estimation.";
}
}
else if (i == 1)
{
EXPECT_EQ(2, message) << "Acquisition failure. Expected message: 2=ACQ FAIL.";
}
}
delete acquisition;
delete config;
}
TEST_F(GalileoE1PcpsTongAmbiguousAcquisitionGSoC2013Test, ValidationOfResultsProbabilities)
{
config_2();
acquisition = new GalileoE1PcpsTongAmbiguousAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
std::cout << "Probability of false alarm (target) = " << 0.0 << std::endl;
// i = 0 --> sallite in acquisition is visible (prob of detection and prob of detection with wrong estimation)
// i = 1 --> satellite in acquisition is not visible (prob of false detection)
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
std::cout << "Probability of detection = " << Pd << std::endl;
std::cout << "Probability of false alarm (satellite present) = " << Pfa_p << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
else if (i == 1)
{
std::cout << "Probability of false alarm (satellite absent) = " << Pfa_a << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
}
delete acquisition;
delete config;
}

577
src/tests/gnss_block/gps_l1_ca_pcps_acquisition_gsoc2013_test.cc Normal file
View File

@ -0,0 +1,577 @@
/*!
* \file gps_l1_ca_pcps_acquisition_gsoc2013_test.cc
* \brief This class implements an acquisition test for
* GpsL1CaPcpsAcquisition class.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include <gtest/gtest.h>
#include <sys/time.h>
#include <iostream>
#include <gnuradio/top_block.h>
#include <gnuradio/blocks/file_source.h>
#include <gnuradio/analog/sig_source_waveform.h>
#include <gnuradio/analog/sig_source_c.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/null_sink.h>
#include "gnss_block_interface.h"
#include "in_memory_configuration.h"
#include "configuration_interface.h"
#include "gnss_synchro.h"
#include "gps_l1_ca_pcps_acquisition.h"
#include "signal_generator.h"
#include "signal_generator.cc"
#include "signal_generator_c.h"
#include "signal_generator_c.cc"
#include "fir_filter.h"
#include "gen_signal_source.h"
#include "gnss_sdr_valve.h"
#include "boost/shared_ptr.hpp"
#include "pass_through.h"
class GpsL1CaPcpsAcquisitionGSoC2013Test: public ::testing::Test
{
protected:
GpsL1CaPcpsAcquisitionGSoC2013Test()
{
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
item_size = sizeof(gr_complex);
stop = false;
message = 0;
}
~GpsL1CaPcpsAcquisitionGSoC2013Test()
{
}
void init();
void config_1();
void config_2();
void start_queue();
void wait_message();
void process_message();
void stop_queue();
gr::msg_queue::sptr queue;
gr::top_block_sptr top_block;
GpsL1CaPcpsAcquisition *acquisition;
InMemoryConfiguration* config;
Gnss_Synchro gnss_synchro;
size_t item_size;
concurrent_queue<int> channel_internal_queue;
bool stop;
int message;
boost::thread ch_thread;
unsigned int integration_time_ms;
unsigned int fs_in;
double expected_delay_chips;
double expected_doppler_hz;
float max_doppler_error_hz;
float max_delay_error_chips;
unsigned int num_of_realizations;
unsigned int realization_counter;
unsigned int detection_counter;
unsigned int correct_estimation_counter;
unsigned int acquired_samples;
unsigned int mean_acq_time_us;
double mse_doppler;
double mse_delay;
double Pd;
double Pfa_p;
double Pfa_a;
};
void GpsL1CaPcpsAcquisitionGSoC2013Test::init()
{
message = 0;
realization_counter = 0;
detection_counter = 0;
correct_estimation_counter = 0;
acquired_samples = 0;
mse_doppler = 0;
mse_delay = 0;
mean_acq_time_us = 0;
Pd = 0;
Pfa_p = 0;
Pfa_a = 0;
}
void GpsL1CaPcpsAcquisitionGSoC2013Test::config_1()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'G';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 1;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 1;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "1");
config->set_property("SignalSource.system_0", "G");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0", std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0", std::to_string(expected_delay_chips));
config->set_property("SignalSource.noise_flag", "false");
config->set_property("SignalSource.data_flag", "false");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.max_dwells", "1");
config->set_property("Acquisition.implementation", "GPS_L1_CA_PCPS_Acquisition");
config->set_property("Acquisition.threshold", "0.8");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.bit_transition_flag", "false");
config->set_property("Acquisition.dump", "false");
}
void GpsL1CaPcpsAcquisitionGSoC2013Test::config_2()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'G';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 1;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 100;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "4");
config->set_property("SignalSource.system_0", "G");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0", std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0", std::to_string(expected_delay_chips));
config->set_property("SignalSource.system_1", "G");
config->set_property("SignalSource.PRN_1", "15");
config->set_property("SignalSource.CN0_dB_1", "44");
config->set_property("SignalSource.doppler_Hz_1", "1000");
config->set_property("SignalSource.delay_chips_1", "100");
config->set_property("SignalSource.system_2", "E");
config->set_property("SignalSource.PRN_2", "21");
config->set_property("SignalSource.CN0_dB_2", "44");
config->set_property("SignalSource.doppler_Hz_2", "2000");
config->set_property("SignalSource.delay_chips_2", "200");
config->set_property("SignalSource.system_3", "E");
config->set_property("SignalSource.PRN_3", "22");
config->set_property("SignalSource.CN0_dB_3", "44");
config->set_property("SignalSource.doppler_Hz_3", "3000");
config->set_property("SignalSource.delay_chips_3", "300");
config->set_property("SignalSource.noise_flag", "true");
config->set_property("SignalSource.data_flag", "true");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.max_dwells", "1");
config->set_property("Acquisition.implementation", "GPS_L1_CA_PCPS_Acquisition");
config->set_property("Acquisition.pfa", "1e-1");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.bit_transition_flag", "false");
config->set_property("Acquisition.dump", "false");
}
void GpsL1CaPcpsAcquisitionGSoC2013Test::start_queue()
{
stop = false;
ch_thread = boost::thread(&GpsL1CaPcpsAcquisitionGSoC2013Test::wait_message, this);
}
void GpsL1CaPcpsAcquisitionGSoC2013Test::wait_message()
{
struct timeval tv;
long long int begin = 0;
long long int end = 0;
while (!stop)
{
acquisition->reset();
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
channel_internal_queue.wait_and_pop(message);
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
mean_acq_time_us += (end-begin);
process_message();
}
}
void GpsL1CaPcpsAcquisitionGSoC2013Test::process_message()
{
if (message == 1)
{
detection_counter++;
// The term -5 is here to correct the additional delay introduced by the FIR filter
double delay_error_chips = abs((double)expected_delay_chips - (double)(gnss_synchro.Acq_delay_samples-5)*1023.0/((double)fs_in*1e-3));
double doppler_error_hz = abs(expected_doppler_hz - gnss_synchro.Acq_doppler_hz);
mse_delay += std::pow(delay_error_chips, 2);
mse_doppler += std::pow(doppler_error_hz, 2);
if ((delay_error_chips < max_delay_error_chips) && (doppler_error_hz < max_doppler_error_hz))
{
correct_estimation_counter++;
}
}
realization_counter++;
std::cout << "Progress: " << round((float)realization_counter/num_of_realizations*100) << "% \r" << std::flush;
if (realization_counter == num_of_realizations)
{
mse_delay /= num_of_realizations;
mse_doppler /= num_of_realizations;
Pd = (double)correct_estimation_counter / (double)num_of_realizations;
Pfa_a = (double)detection_counter / (double)num_of_realizations;
Pfa_p = (double)(detection_counter-correct_estimation_counter) / (double)num_of_realizations;
mean_acq_time_us /= num_of_realizations;
stop_queue();
top_block->stop();
std::cout << std::endl;
}
}
void GpsL1CaPcpsAcquisitionGSoC2013Test::stop_queue()
{
stop = true;
}
TEST_F(GpsL1CaPcpsAcquisitionGSoC2013Test, Instantiate)
{
config_1();
acquisition = new GpsL1CaPcpsAcquisition(config, "Acquisition", 1, 1, queue);
delete acquisition;
delete config;
}
TEST_F(GpsL1CaPcpsAcquisitionGSoC2013Test, ConnectAndRun)
{
int nsamples = floor(fs_in*integration_time_ms*1e-3);
struct timeval tv;
long long int begin = 0;
long long int end = 0;
config_1();
acquisition = new GpsL1CaPcpsAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->connect(top_block);
boost::shared_ptr<gr::analog::sig_source_c> source = gr::analog::sig_source_c::make(fs_in, gr::analog::GR_SIN_WAVE, 1000, 1, gr_complex(0));
boost::shared_ptr<gr::block> valve = gnss_sdr_make_valve(sizeof(gr_complex), nsamples, queue);
top_block->connect(source, 0, valve, 0);
top_block->connect(valve, 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test."<< std::endl;
EXPECT_NO_THROW( {
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
top_block->run(); // Start threads and wait
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
}) << "Failure running the top_block."<< std::endl;
std::cout << "Processed " << nsamples << " samples in " << (end-begin) << " microseconds" << std::endl;
delete acquisition;
delete config;
}
TEST_F(GpsL1CaPcpsAcquisitionGSoC2013Test, ValidationOfResults)
{
config_1();
acquisition = new GpsL1CaPcpsAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
// i = 0 --> sallite in acquisition is visible
// i = 1 --> satellite in acquisition is not visible
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
EXPECT_EQ(1, message) << "Acquisition failure. Expected message: 1=ACQ SUCCESS.";
if (message == 1)
{
EXPECT_EQ(1, correct_estimation_counter) << "Acquisition failure. Incorrect parameters estimation.";
}
}
else if (i == 1)
{
EXPECT_EQ(2, message) << "Acquisition failure. Expected message: 2=ACQ FAIL.";
}
}
delete acquisition;
delete config;
}
TEST_F(GpsL1CaPcpsAcquisitionGSoC2013Test, ValidationOfResultsProbabilities)
{
config_2();
acquisition = new GpsL1CaPcpsAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
std::cout << "Probability of false alarm (target) = " << 0.1 << std::endl;
// i = 0 --> sallite in acquisition is visible (prob of detection and prob of detection with wrong estimation)
// i = 1 --> satellite in acquisition is not visible (prob of false detection)
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
std::cout << "Probability of detection = " << Pd << std::endl;
std::cout << "Probability of false alarm (satellite present) = " << Pfa_p << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
else if (i == 1)
{
std::cout << "Probability of false alarm (satellite absent) = " << Pfa_a << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
}
delete acquisition;
delete config;
}

3
src/tests/gnss_block/gps_l1_ca_pcps_acquisition_test.cc
View File

@ -98,7 +98,7 @@ void GpsL1CaPcpsAcquisitionTest::init()
config->set_property("GNSS-SDR.internal_fs_hz", "4000000");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.sampled_ms", "1");
config->set_property("Acquisition.coherent_integration_time_ms", "1");
config->set_property("Acquisition.dump", "false");
config->set_property("Acquisition.implementation", "GPS_L1_CA_PCPS_Acquisition");
config->set_property("Acquisition.threshold", "0.005");
@ -219,6 +219,7 @@ TEST_F(GpsL1CaPcpsAcquisitionTest, ValidationOfResults)
}) << "Failure connecting the blocks of acquisition test."<< std::endl;
start_queue();
acquisition->init();
acquisition->reset();

576
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@ -0,0 +1,576 @@
/*!
* \file gps_l1_ca_pcps_acquisition_gsoc2013_test.cc
* \brief This class implements an acquisition test for
* GpsL1CaPcpsMultithreadAcquisition class.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include <gtest/gtest.h>
#include <sys/time.h>
#include <iostream>
#include <gnuradio/top_block.h>
#include <gnuradio/blocks/file_source.h>
#include <gnuradio/analog/sig_source_waveform.h>
#include <gnuradio/analog/sig_source_c.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/null_sink.h>
#include "gnss_block_interface.h"
#include "in_memory_configuration.h"
#include "configuration_interface.h"
#include "gnss_synchro.h"
#include "gps_l1_ca_pcps_multithread_acquisition.h"
#include "signal_generator.h"
//#include "signal_generator.cc"
#include "signal_generator_c.h"
//#include "signal_generator_c.cc"
#include "fir_filter.h"
#include "gen_signal_source.h"
#include "gnss_sdr_valve.h"
#include "boost/shared_ptr.hpp"
class GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test: public ::testing::Test
{
protected:
GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test()
{
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
item_size = sizeof(gr_complex);
stop = false;
message = 0;
}
~GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test()
{
}
void init();
void config_1();
void config_2();
void start_queue();
void wait_message();
void process_message();
void stop_queue();
gr::msg_queue::sptr queue;
gr::top_block_sptr top_block;
GpsL1CaPcpsMultithreadAcquisition *acquisition;
InMemoryConfiguration* config;
Gnss_Synchro gnss_synchro;
size_t item_size;
concurrent_queue<int> channel_internal_queue;
bool stop;
int message;
boost::thread ch_thread;
unsigned int integration_time_ms;
unsigned int fs_in;
double expected_delay_chips;
double expected_doppler_hz;
float max_doppler_error_hz;
float max_delay_error_chips;
unsigned int num_of_realizations;
unsigned int realization_counter;
unsigned int detection_counter;
unsigned int correct_estimation_counter;
unsigned int acquired_samples;
unsigned int mean_acq_time_us;
double mse_doppler;
double mse_delay;
double Pd;
double Pfa_p;
double Pfa_a;
};
void GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test::init()
{
message = 0;
realization_counter = 0;
detection_counter = 0;
correct_estimation_counter = 0;
acquired_samples = 0;
mse_doppler = 0;
mse_delay = 0;
mean_acq_time_us = 0;
Pd = 0;
Pfa_p = 0;
Pfa_a = 0;
}
void GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test::config_1()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'G';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 1;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 1;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "1");
config->set_property("SignalSource.system_0", "G");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0", std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0", std::to_string(expected_delay_chips));
config->set_property("SignalSource.noise_flag", "false");
config->set_property("SignalSource.data_flag", "false");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.max_dwells", "1");
config->set_property("Acquisition.implementation", "GPS_L1_CA_PCPS_Multithread_Acquisition");
config->set_property("Acquisition.threshold", "0.8");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.bit_transition_flag", "false");
config->set_property("Acquisition.dump", "false");
}
void GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test::config_2()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'G';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 4;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 100;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "4");
config->set_property("SignalSource.system_0", "G");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0", std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0", std::to_string(expected_delay_chips));
config->set_property("SignalSource.system_1", "G");
config->set_property("SignalSource.PRN_1", "15");
config->set_property("SignalSource.CN0_dB_1", "44");
config->set_property("SignalSource.doppler_Hz_1", "1000");
config->set_property("SignalSource.delay_chips_1", "100");
config->set_property("SignalSource.system_2", "E");
config->set_property("SignalSource.PRN_2", "21");
config->set_property("SignalSource.CN0_dB_2", "44");
config->set_property("SignalSource.doppler_Hz_2", "2000");
config->set_property("SignalSource.delay_chips_2", "200");
config->set_property("SignalSource.system_3", "E");
config->set_property("SignalSource.PRN_3", "22");
config->set_property("SignalSource.CN0_dB_3", "44");
config->set_property("SignalSource.doppler_Hz_3", "3000");
config->set_property("SignalSource.delay_chips_3", "300");
config->set_property("SignalSource.noise_flag", "true");
config->set_property("SignalSource.data_flag", "true");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.max_dwells", "1");
config->set_property("Acquisition.implementation", "GPS_L1_CA_PCPS_Multithread_Acquisition");
config->set_property("Acquisition.pfa", "1e-1");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.bit_transition_flag", "true");
config->set_property("Acquisition.dump", "false");
}
void GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test::start_queue()
{
stop = false;
ch_thread = boost::thread(&GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test::wait_message, this);
}
void GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test::wait_message()
{
struct timeval tv;
long long int begin = 0;
long long int end = 0;
while (!stop)
{
acquisition->reset();
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
channel_internal_queue.wait_and_pop(message);
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
mean_acq_time_us += (end-begin);
process_message();
}
}
void GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test::process_message()
{
if (message == 1)
{
detection_counter++;
// The term -5 is here to correct the additional delay introduced by the FIR filter
double delay_error_chips = abs((double)expected_delay_chips - (double)(gnss_synchro.Acq_delay_samples-5)*1023.0/((double)fs_in*1e-3));
double doppler_error_hz = abs(expected_doppler_hz - gnss_synchro.Acq_doppler_hz);
mse_delay += std::pow(delay_error_chips, 2);
mse_doppler += std::pow(doppler_error_hz, 2);
if ((delay_error_chips < max_delay_error_chips) && (doppler_error_hz < max_doppler_error_hz))
{
correct_estimation_counter++;
}
}
realization_counter++;
std::cout << "Progress: " << round((float)realization_counter/num_of_realizations*100) << "% \r" << std::flush;
if (realization_counter == num_of_realizations)
{
mse_delay /= num_of_realizations;
mse_doppler /= num_of_realizations;
Pd = (double)correct_estimation_counter / (double)num_of_realizations;
Pfa_a = (double)detection_counter / (double)num_of_realizations;
Pfa_p = (double)(detection_counter-correct_estimation_counter) / (double)num_of_realizations;
mean_acq_time_us /= num_of_realizations;
stop_queue();
top_block->stop();
std::cout << std::endl;
}
}
void GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test::stop_queue()
{
stop = true;
}
TEST_F(GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test, Instantiate)
{
config_1();
acquisition = new GpsL1CaPcpsMultithreadAcquisition(config, "Acquisition", 1, 1, queue);
delete acquisition;
delete config;
}
TEST_F(GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test, ConnectAndRun)
{
int nsamples = floor(fs_in*integration_time_ms*1e-3);
struct timeval tv;
long long int begin = 0;
long long int end = 0;
config_1();
acquisition = new GpsL1CaPcpsMultithreadAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->connect(top_block);
boost::shared_ptr<gr::analog::sig_source_c> source = gr::analog::sig_source_c::make(fs_in, gr::analog::GR_SIN_WAVE, 1000, 1, gr_complex(0));
boost::shared_ptr<gr::block> valve = gnss_sdr_make_valve(sizeof(gr_complex), nsamples, queue);
top_block->connect(source, 0, valve, 0);
top_block->connect(valve, 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test."<< std::endl;
EXPECT_NO_THROW( {
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
top_block->run(); // Start threads and wait
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
}) << "Failure running the top_block."<< std::endl;
std::cout << "Processed " << nsamples << " samples in " << (end-begin) << " microseconds" << std::endl;
delete acquisition;
delete config;
}
TEST_F(GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test, ValidationOfResults)
{
config_1();
acquisition = new GpsL1CaPcpsMultithreadAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
// i = 0 --> sallite in acquisition is visible
// i = 1 --> satellite in acquisition is not visible
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
EXPECT_EQ(1, message) << "Acquisition failure. Expected message: 1=ACQ SUCCESS.";
if (message == 1)
{
EXPECT_EQ(1, correct_estimation_counter) << "Acquisition failure. Incorrect parameters estimation.";
}
}
else if (i == 1)
{
EXPECT_EQ(2, message) << "Acquisition failure. Expected message: 2=ACQ FAIL.";
}
}
delete acquisition;
delete config;
}
TEST_F(GpsL1CaPcpsMultithreadAcquisitionGSoC2013Test, ValidationOfResultsProbabilities)
{
config_2();
acquisition = new GpsL1CaPcpsMultithreadAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
std::cout << "Probability of false alarm (target) = " << 0.1 << std::endl;
// i = 0 --> sallite in acquisition is visible (prob of detection and prob of detection with wrong estimation)
// i = 1 --> satellite in acquisition is not visible (prob of false detection)
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
std::cout << "Probability of detection = " << Pd << std::endl;
std::cout << "Probability of false alarm (satellite present) = " << Pfa_p << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
else if (i == 1)
{
std::cout << "Probability of false alarm (satellite absent) = " << Pfa_a << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
}
delete acquisition;
delete config;
}

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@ -0,0 +1,575 @@
/*!
* \file gps_l1_ca_pcps_tong_acquisition_gsoc2013_test.cc
* \brief This class implements an acquisition test for
* GpsL1CaPcpsTongAcquisition class.
* \author Marc Molina, 2013. marc.molina.pena(at)gmail.com
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2012 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include <gtest/gtest.h>
#include <sys/time.h>
#include <iostream>
#include <gnuradio/top_block.h>
#include <gnuradio/blocks/file_source.h>
#include <gnuradio/analog/sig_source_waveform.h>
#include <gnuradio/analog/sig_source_c.h>
#include <gnuradio/msg_queue.h>
#include <gnuradio/blocks/null_sink.h>
#include "gnss_block_interface.h"
#include "in_memory_configuration.h"
#include "configuration_interface.h"
#include "gnss_synchro.h"
#include "gps_l1_ca_pcps_tong_acquisition.h"
#include "signal_generator.h"
//#include "signal_generator.cc"
#include "signal_generator_c.h"
//#include "signal_generator_c.cc"
#include "fir_filter.h"
#include "gen_signal_source.h"
#include "gnss_sdr_valve.h"
#include "boost/shared_ptr.hpp"
class GpsL1CaPcpsTongAcquisitionGSoC2013Test: public ::testing::Test
{
protected:
GpsL1CaPcpsTongAcquisitionGSoC2013Test()
{
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
item_size = sizeof(gr_complex);
stop = false;
message = 0;
}
~GpsL1CaPcpsTongAcquisitionGSoC2013Test()
{
}
void init();
void config_1();
void config_2();
void start_queue();
void wait_message();
void process_message();
void stop_queue();
gr::msg_queue::sptr queue;
gr::top_block_sptr top_block;
GpsL1CaPcpsTongAcquisition *acquisition;
InMemoryConfiguration* config;
Gnss_Synchro gnss_synchro;
size_t item_size;
concurrent_queue<int> channel_internal_queue;
bool stop;
int message;
boost::thread ch_thread;
unsigned int integration_time_ms;
unsigned int fs_in;
double expected_delay_chips;
double expected_doppler_hz;
float max_doppler_error_hz;
float max_delay_error_chips;
unsigned int num_of_realizations;
unsigned int realization_counter;
unsigned int detection_counter;
unsigned int correct_estimation_counter;
unsigned int acquired_samples;
unsigned int mean_acq_time_us;
double mse_doppler;
double mse_delay;
double Pd;
double Pfa_p;
double Pfa_a;
};
void GpsL1CaPcpsTongAcquisitionGSoC2013Test::init()
{
message = 0;
realization_counter = 0;
detection_counter = 0;
correct_estimation_counter = 0;
acquired_samples = 0;
mse_doppler = 0;
mse_delay = 0;
mean_acq_time_us = 0;
Pd = 0;
Pfa_p = 0;
Pfa_a = 0;
}
void GpsL1CaPcpsTongAcquisitionGSoC2013Test::config_1()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'G';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 1;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 1;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "1");
config->set_property("SignalSource.system_0", "G");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0", std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0", std::to_string(expected_delay_chips));
config->set_property("SignalSource.noise_flag", "false");
config->set_property("SignalSource.data_flag", "false");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.implementation", "GPS_L1_CA_PCPS_Tong_Acquisition");
config->set_property("Acquisition.threshold", "0.8");
config->set_property("Acquisition.tong_init_val", "5");
config->set_property("Acquisition.tong_max_val", "10");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.dump", "false");
}
void GpsL1CaPcpsTongAcquisitionGSoC2013Test::config_2()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'G';
std::string signal = "1C";
signal.copy(gnss_synchro.Signal,2,0);
integration_time_ms = 1;
fs_in = 4e6;
expected_delay_chips = 600;
expected_doppler_hz = 750;
max_doppler_error_hz = 2/(3*integration_time_ms*1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 100;
config = new InMemoryConfiguration();
config->set_property("GNSS-SDR.internal_fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.fs_hz", std::to_string(fs_in));
config->set_property("SignalSource.item_type", "gr_complex");
config->set_property("SignalSource.num_satellites", "4");
config->set_property("SignalSource.system_0", "G");
config->set_property("SignalSource.PRN_0", "10");
config->set_property("SignalSource.CN0_dB_0", "44");
config->set_property("SignalSource.doppler_Hz_0", std::to_string(expected_doppler_hz));
config->set_property("SignalSource.delay_chips_0", std::to_string(expected_delay_chips));
config->set_property("SignalSource.system_1", "G");
config->set_property("SignalSource.PRN_1", "15");
config->set_property("SignalSource.CN0_dB_1", "44");
config->set_property("SignalSource.doppler_Hz_1", "1000");
config->set_property("SignalSource.delay_chips_1", "100");
config->set_property("SignalSource.system_2", "E");
config->set_property("SignalSource.PRN_2", "10");
config->set_property("SignalSource.CN0_dB_2", "44");
config->set_property("SignalSource.doppler_Hz_2", "2000");
config->set_property("SignalSource.delay_chips_2", "200");
config->set_property("SignalSource.system_3", "E");
config->set_property("SignalSource.PRN_3", "20");
config->set_property("SignalSource.CN0_dB_3", "44");
config->set_property("SignalSource.doppler_Hz_3", "3000");
config->set_property("SignalSource.delay_chips_3", "300");
config->set_property("SignalSource.noise_flag", "true");
config->set_property("SignalSource.data_flag", "true");
config->set_property("SignalSource.BW_BB", "0.97");
config->set_property("InputFilter.implementation", "Fir_Filter");
config->set_property("InputFilter.input_item_type", "gr_complex");
config->set_property("InputFilter.output_item_type", "gr_complex");
config->set_property("InputFilter.taps_item_type", "float");
config->set_property("InputFilter.number_of_taps", "11");
config->set_property("InputFilter.number_of_bands", "2");
config->set_property("InputFilter.band1_begin", "0.0");
config->set_property("InputFilter.band1_end", "0.97");
config->set_property("InputFilter.band2_begin", "0.98");
config->set_property("InputFilter.band2_end", "1.0");
config->set_property("InputFilter.ampl1_begin", "1.0");
config->set_property("InputFilter.ampl1_end", "1.0");
config->set_property("InputFilter.ampl2_begin", "0.0");
config->set_property("InputFilter.ampl2_end", "0.0");
config->set_property("InputFilter.band1_error", "1.0");
config->set_property("InputFilter.band2_error", "1.0");
config->set_property("InputFilter.filter_type", "bandpass");
config->set_property("InputFilter.grid_density", "16");
config->set_property("Acquisition.item_type", "gr_complex");
config->set_property("Acquisition.if", "0");
config->set_property("Acquisition.coherent_integration_time_ms",
std::to_string(integration_time_ms));
config->set_property("Acquisition.implementation", "GPS_L1_CA_PCPS_Tong_Acquisition");
config->set_property("Acquisition.threshold", "0.002");
config->set_property("Acquisition.tong_init_val", "5");
config->set_property("Acquisition.tong_max_val", "10");
config->set_property("Acquisition.doppler_max", "10000");
config->set_property("Acquisition.doppler_step", "250");
config->set_property("Acquisition.dump", "false");
}
void GpsL1CaPcpsTongAcquisitionGSoC2013Test::start_queue()
{
stop = false;
ch_thread = boost::thread(&GpsL1CaPcpsTongAcquisitionGSoC2013Test::wait_message, this);
}
void GpsL1CaPcpsTongAcquisitionGSoC2013Test::wait_message()
{
struct timeval tv;
long long int begin = 0;
long long int end = 0;
while (!stop)
{
acquisition->reset();
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
channel_internal_queue.wait_and_pop(message);
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
mean_acq_time_us += (end-begin);
process_message();
}
}
void GpsL1CaPcpsTongAcquisitionGSoC2013Test::process_message()
{
if (message == 1)
{
detection_counter++;
// The term -5 is here to correct the additional delay introduced by the FIR filter
double delay_error_chips = abs((double)expected_delay_chips - (double)(gnss_synchro.Acq_delay_samples-5)*1023.0/((double)fs_in*1e-3));
double doppler_error_hz = abs(expected_doppler_hz - gnss_synchro.Acq_doppler_hz);
mse_delay += std::pow(delay_error_chips, 2);
mse_doppler += std::pow(doppler_error_hz, 2);
if ((delay_error_chips < max_delay_error_chips) && (doppler_error_hz < max_doppler_error_hz))
{
correct_estimation_counter++;
}
}
realization_counter++;
std::cout << "Progress: " << round((float)realization_counter/num_of_realizations*100) << "% \r" << std::flush;
if (realization_counter == num_of_realizations)
{
mse_delay /= num_of_realizations;
mse_doppler /= num_of_realizations;
Pd = (double)correct_estimation_counter / (double)num_of_realizations;
Pfa_a = (double)detection_counter / (double)num_of_realizations;
Pfa_p = (double)(detection_counter-correct_estimation_counter) / (double)num_of_realizations;
mean_acq_time_us /= num_of_realizations;
stop_queue();
top_block->stop();
std::cout << std::endl;
}
}
void GpsL1CaPcpsTongAcquisitionGSoC2013Test::stop_queue()
{
stop = true;
}
TEST_F(GpsL1CaPcpsTongAcquisitionGSoC2013Test, Instantiate)
{
config_1();
acquisition = new GpsL1CaPcpsTongAcquisition(config, "Acquisition", 1, 1, queue);
delete acquisition;
delete config;
}
TEST_F(GpsL1CaPcpsTongAcquisitionGSoC2013Test, ConnectAndRun)
{
int nsamples = floor(fs_in*integration_time_ms*1e-3);
struct timeval tv;
long long int begin = 0;
long long int end = 0;
config_1();
acquisition = new GpsL1CaPcpsTongAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->connect(top_block);
boost::shared_ptr<gr::analog::sig_source_c> source = gr::analog::sig_source_c::make(fs_in, gr::analog::GR_SIN_WAVE, 1000, 1, gr_complex(0));
boost::shared_ptr<gr::block> valve = gnss_sdr_make_valve(sizeof(gr_complex), nsamples, queue);
top_block->connect(source, 0, valve, 0);
top_block->connect(valve, 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test."<< std::endl;
EXPECT_NO_THROW( {
gettimeofday(&tv, NULL);
begin = tv.tv_sec *1e6 + tv.tv_usec;
top_block->run(); // Start threads and wait
gettimeofday(&tv, NULL);
end = tv.tv_sec *1e6 + tv.tv_usec;
}) << "Failure running the top_block."<< std::endl;
std::cout << "Processed " << nsamples << " samples in " << (end-begin) << " microseconds" << std::endl;
delete acquisition;
delete config;
}
TEST_F(GpsL1CaPcpsTongAcquisitionGSoC2013Test, ValidationOfResults)
{
config_1();
acquisition = new GpsL1CaPcpsTongAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
// i = 0 --> sallite in acquisition is visible
// i = 1 --> satellite in acquisition is not visible
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
EXPECT_EQ(1, message) << "Acquisition failure. Expected message: 1=ACQ SUCCESS.";
if (message == 1)
{
EXPECT_EQ(1, correct_estimation_counter) << "Acquisition failure. Incorrect parameters estimation.";
}
}
else if (i == 1)
{
EXPECT_EQ(2, message) << "Acquisition failure. Expected message: 2=ACQ FAIL.";
}
}
delete acquisition;
delete config;
}
TEST_F(GpsL1CaPcpsTongAcquisitionGSoC2013Test, ValidationOfResultsProbabilities)
{
config_2();
acquisition = new GpsL1CaPcpsTongAcquisition(config, "Acquisition", 1, 1, queue);
ASSERT_NO_THROW( {
acquisition->set_channel(1);
}) << "Failure setting channel."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_channel_queue(&channel_internal_queue);
}) << "Failure setting channel_internal_queue."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_max(config->property("Acquisition.doppler_max", 10000));
}) << "Failure setting doppler_max."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_doppler_step(config->property("Acquisition.doppler_step", 500));
}) << "Failure setting doppler_step."<< std::endl;
ASSERT_NO_THROW( {
acquisition->set_threshold(config->property("Acquisition.threshold", 0.0));
}) << "Failure setting threshold."<< std::endl;
ASSERT_NO_THROW( {
acquisition->connect(top_block);
}) << "Failure connecting acquisition to the top_block."<< std::endl;
acquisition->init();
ASSERT_NO_THROW( {
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config, "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config, "InputFilter", 1, 1, queue);
signal_source.reset(new GenSignalSource(config, signal_generator, filter, "SignalSource", queue));
signal_source->connect(top_block);
top_block->connect(signal_source->get_right_block(), 0, acquisition->get_left_block(), 0);
}) << "Failure connecting the blocks of acquisition test." << std::endl;
std::cout << "Probability of false alarm (target) = " << 0.0 << std::endl;
// i = 0 --> sallite in acquisition is visible (prob of detection and prob of detection with wrong estimation)
// i = 1 --> satellite in acquisition is not visible (prob of false detection)
for (unsigned int i = 0; i < 2; i++)
{
init();
if (i == 0)
{
gnss_synchro.PRN = 10; // This satellite is visible
}
else if (i == 1)
{
gnss_synchro.PRN = 20; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW( {
top_block->run(); // Start threads and wait
}) << "Failure running he top_block."<< std::endl;
if (i == 0)
{
std::cout << "Probability of detection = " << Pd << std::endl;
std::cout << "Probability of false alarm (satellite present) = " << Pfa_p << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
else if (i == 1)
{
std::cout << "Probability of false alarm (satellite absent) = " << Pfa_a << std::endl;
// std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
}
delete acquisition;
delete config;
}

16
src/tests/test_main.cc
View File

@ -69,10 +69,20 @@
#include "gnss_block/file_output_filter_test.cc"
#include "gnss_block/file_signal_source_test.cc"
#include "gnss_block/fir_filter_test.cc"
#include "gnss_block/gps_l1_ca_pcps_acquisition_test.cc"
#include "gnss_block/galileo_e1_pcps_ambiguous_acquisition_test.cc"
//#include "gnss_block/galileo_e1_pcps_ambiguous_acquisition_gsoc_test.cc"//
//#include "gnss_block/gps_l1_ca_pcps_acquisition_test.cc"
#include "gnss_block/gps_l1_ca_pcps_acquisition_gsoc2013_test.cc"
#include "gnss_block/gps_l1_ca_pcps_multithread_acquisition_gsoc2013_test.cc"
#include "gnss_block/gps_l1_ca_pcps_tong_acquisition_gsoc2013_test.cc"
//#include "gnss_block/galileo_e1_pcps_ambiguous_acquisition_test.cc"
//#include "gnss_block/galileo_e1_pcps_ambiguous_acquisition_gsoc_test.cc"
#include "gnss_block/galileo_e1_pcps_ambiguous_acquisition_gsoc2013_test.cc"
#include "gnss_block/galileo_e1_pcps_8ms_ambiguous_acquisition_gsoc2013_test.cc"
#include "gnss_block/galileo_e1_pcps_tong_ambiguous_acquisition_gsoc2013_test.cc"
#include "gnss_block/galileo_e1_pcps_cccwsr_ambiguous_acquisition_gsoc2013_test.cc"
#include "gnss_block/galileo_e1_dll_pll_veml_tracking_test.cc"
#include "gnss_block/gnss_block_factory_test.cc"
#include "gnuradio_block/gnss_sdr_valve_test.cc"
#include "gnuradio_block/direct_resampler_conditioner_cc_test.cc"