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GLONASS L2 CA Signal Addition 

Adds GLONASS L2 C/A signal processing to GNSS-SDR based on previous
work developed for the L1 signal. All code have been added in a single
commit with the idea to illustrate the process of signal addition for
future work
This commit is contained in:
Damian Miralles 2018-03-24 12:42:04 -06:00
parent 30d1494eec
commit 287d38dea2
55 changed files with 6959 additions and 74 deletions
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12
conf/gnss-sdr_GLONASS_L1_CA_ibyte.conf
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@ -5,7 +5,7 @@ GNSS-SDR.internal_fs_sps=6625000
;######### SIGNAL_SOURCE CONFIG ############
SignalSource.implementation=File_Signal_Source
SignalSource.filename=/archive/NT1065_GLONASS_L1_20160924_fs6625e6_if0e3_schar.bin ; <- PUT YOUR FILE HERE
SignalSource.filename=/media/dmiralles/Seagate Backup Plus Drive/GNSS Data/NT1065_GLONASS_L1_20160923_fs6625e6_if0e3_schar.bin ; <- PUT YOUR FILE HERE ; <- PUT YOUR FILE HERE
SignalSource.item_type=ibyte
SignalSource.sampling_frequency=6625000
SignalSource.samples=0
@ -25,11 +25,11 @@ Channel.signal=1G
Channels.in_acquisition=1
Channels_1G.count=5
;Channel0.satellite=24 ; k=
;Channel1.satellite=1 ; k=1
;Channel2.satellite=2 ; k=-4
;Channel3.satellite=20 ; k=-5
;Channel4.satellite=21 ; k=4
Channel0.satellite=24 ; k=
Channel1.satellite=1 ; k=1
Channel2.satellite=2 ; k=-4
Channel3.satellite=20 ; k=-5
Channel4.satellite=21 ; k=4
;######### ACQUISITION GLOBAL CONFIG ############
Acquisition_1G.implementation=GLONASS_L1_CA_PCPS_Acquisition

141
conf/gnss-sdr_GLONASS_L2_CA_GPS_L1_CA_ibyte.conf Normal file
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@ -0,0 +1,141 @@
[GNSS-SDR]
;######### GLOBAL OPTIONS ##################
GNSS-SDR.internal_fs_sps=6625000
Receiver.sources_count=2
;######### SIGNAL_SOURCE CONFIG ############
SignalSource0.implementation=File_Signal_Source
SignalSource0.filename=/media/dmiralles/Seagate Backup Plus Drive/GNSS Data/NT1065_L1_20160923_fs6625e6_if60e3_schar.bin ; <- PUT YOUR FILE HERE
SignalSource0.item_type=ibyte
SignalSource0.sampling_frequency=6625000
SignalSource0.samples=0
SignalSource0.dump=false;
SignalSource0.dump_filename=/archive/signal_glonass.bin
SignalSource1.implementation=File_Signal_Source
SignalSource1.filename=/media/dmiralles/Seagate Backup Plus Drive/GNSS Data/NT1065_GLONASS_L2_20160923_fs6625e6_if0e3_schar.bin ; <- PUT YOUR FILE HERE
SignalSource1.item_type=ibyte
SignalSource1.sampling_frequency=6625000
SignalSource1.samples=0
SignalSource1.dump=false;
SignalSource1.dump_filename=/archive/signal_glonass.bin
;######### SIGNAL_CONDITIONER CONFIG ############
SignalConditioner0.implementation=Signal_Conditioner
DataTypeAdapter0.implementation=Ibyte_To_Complex
InputFilter0.implementation=Freq_Xlating_Fir_Filter
InputFilter0.item_type=gr_complex
InputFilter0.output_item_type=gr_complex
InputFilter0.taps_item_type=float
InputFilter0.number_of_taps=5
InputFilter0.number_of_bands=2
InputFilter0.band1_begin=0.0
InputFilter0.band1_end=0.70
InputFilter0.band2_begin=0.80
InputFilter0.band2_end=1.0
InputFilter0.ampl1_begin=1.0
InputFilter0.ampl1_end=1.0
InputFilter0.ampl2_begin=0.0
InputFilter0.ampl2_end=0.0
InputFilter0.band1_error=1.0
InputFilter0.band2_error=1.0
InputFilter0.filter_type=bandpass
InputFilter0.grid_density=16
InputFilter0.sampling_frequency=6625000
InputFilter0.IF=60000
Resampler0.implementation=Direct_Resampler
Resampler0.sample_freq_in=6625000
Resampler0.sample_freq_out=6625000
Resampler0.item_type=gr_complex
SignalConditioner1.implementation=Signal_Conditioner
DataTypeAdapter1.implementation=Ibyte_To_Complex
InputFilter1.implementation=Pass_Through
InputFilter1.item_type=gr_complex
Resampler1.implementation=Pass_Through
Resampler1.item_type=gr_complex
;######### CHANNELS GLOBAL CONFIG ############
Channels.in_acquisition=1
Channels_2G.count=5
Channels_1C.count=5
;# Defining GLONASS satellites
Channel0.RF_channel_ID=0
Channel1.RF_channel_ID=0
Channel2.RF_channel_ID=0
Channel3.RF_channel_ID=0
Channel4.RF_channel_ID=0
Channel5.RF_channel_ID=1
Channel6.RF_channel_ID=1
Channel7.RF_channel_ID=1
Channel8.RF_channel_ID=1
Channel9.RF_channel_ID=1
;######### ACQUISITION GLOBAL CONFIG ############
Acquisition_1C.implementation=GPS_L1_CA_PCPS_Acquisition
Acquisition_1C.item_type=gr_complex
Acquisition_1C.threshold=0.0
Acquisition_1C.pfa=0.00001
Acquisition_1C.if=0
Acquisition_1C.doppler_max=10000
Acquisition_1C.doppler_step=250
Acquisition_1C.dump=false;
Acquisition_1C.dump_filename=/archive/gps_acquisition.dat
;Acquisition_1C.coherent_integration_time_ms=10
Acquisition_2G.implementation=GLONASS_L2_CA_PCPS_Acquisition
Acquisition_2G.item_type=gr_complex
Acquisition_2G.threshold=0.0
Acquisition_2G.pfa=0.00001
Acquisition_2G.if=0
Acquisition_2G.doppler_max=10000
Acquisition_2G.doppler_step=250
Acquisition_2G.dump=false;
Acquisition_2G.dump_filename=/archive/glo_acquisition.dat
;Acquisition_2G.coherent_integration_time_ms=10
;######### TRACKING GLOBAL CONFIG ############
Tracking_1C.implementation=GPS_L1_CA_DLL_PLL_Tracking
Tracking_1C.item_type=gr_complex
Tracking_1C.if=0
Tracking_1C.early_late_space_chips=0.5
Tracking_1C.pll_bw_hz=20.0;
Tracking_1C.dll_bw_hz=2.0;
Tracking_1C.dump=false;
Tracking_1C.dump_filename=/archive/gps_tracking_ch_
Tracking_2G.implementation=GLONASS_L2_CA_DLL_PLL_Tracking
Tracking_2G.item_type=gr_complex
Tracking_2G.if=0
Tracking_2G.early_late_space_chips=0.5
Tracking_2G.pll_bw_hz=25.0;
Tracking_2G.dll_bw_hz=2.0;
Tracking_2G.dump=false;
Tracking_2G.dump_filename=/archive/glo_tracking_ch_
;######### TELEMETRY DECODER GPS CONFIG ############
TelemetryDecoder_1C.implementation=GPS_L1_CA_Telemetry_Decoder
TelemetryDecoder_2G.implementation=GLONASS_L2_CA_Telemetry_Decoder
;######### OBSERVABLES CONFIG ############
Observables.implementation=Hybrid_Observables
Observables.dump=false;
Observables.dump_filename=/archive/gnss_observables.dat
;######### PVT CONFIG ############
PVT.implementation=RTKLIB_PVT
PVT.output_rate_ms=100
PVT.display_rate_ms=500
PVT.trop_model=Saastamoinen
PVT.flag_rtcm_server=false
PVT.flag_rtcm_tty_port=false
PVT.rtcm_dump_devname=/dev/pts/1
PVT.rtcm_tcp_port=2101
PVT.rtcm_MT1019_rate_ms=5000
PVT.rtcm_MT1045_rate_ms=5000
PVT.rtcm_MT1097_rate_ms=1000
PVT.rtcm_MT1077_rate_ms=1000
PVT.rinex_version=2

142
conf/gnss-sdr_GLONASS_L2_CA_GPS_L2C_ibyte.conf Normal file
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@ -0,0 +1,142 @@
[GNSS-SDR]
;######### GLOBAL OPTIONS ##################
GNSS-SDR.internal_fs_sps=6625000
Receiver.sources_count=2
;######### SIGNAL_SOURCE CONFIG ############
SignalSource0.implementation=File_Signal_Source
SignalSource0.filename=/archive/NT1065_L2_20160923_fs6625e6_if60e3_schar.bin ; <- PUT YOUR FILE HERE
SignalSource0.item_type=ibyte
SignalSource0.sampling_frequency=6625000
SignalSource0.samples=0
SignalSource0.dump=false;
SignalSource0.dump_filename=/archive/signal_glonass.bin
SignalSource1.implementation=File_Signal_Source
SignalSource1.filename=/archive/NT1065_GLONASS_L2_20160923_fs6625e6_if0e3_schar.bin ; <- PUT YOUR FILE HERE
SignalSource1.item_type=ibyte
SignalSource1.sampling_frequency=6625000
SignalSource1.samples=0
SignalSource1.dump=false;
SignalSource1.dump_filename=/archive/signal_glonass.bin
;######### SIGNAL_CONDITIONER CONFIG ############
SignalConditioner0.implementation=Signal_Conditioner
DataTypeAdapter0.implementation=Ibyte_To_Complex
InputFilter0.implementation=Freq_Xlating_Fir_Filter
InputFilter0.item_type=gr_complex
InputFilter0.output_item_type=gr_complex
InputFilter0.taps_item_type=float
InputFilter0.number_of_taps=5
InputFilter0.number_of_bands=2
InputFilter0.band1_begin=0.0
InputFilter0.band1_end=0.70
InputFilter0.band2_begin=0.80
InputFilter0.band2_end=1.0
InputFilter0.ampl1_begin=1.0
InputFilter0.ampl1_end=1.0
InputFilter0.ampl2_begin=0.0
InputFilter0.ampl2_end=0.0
InputFilter0.band1_error=1.0
InputFilter0.band2_error=1.0
InputFilter0.filter_type=bandpass
InputFilter0.grid_density=16
InputFilter0.sampling_frequency=6625000
InputFilter0.IF=60000
Resampler0.implementation=Pass_Through
Resampler0.item_type=gr_complex
SignalConditioner1.implementation=Signal_Conditioner
DataTypeAdapter1.implementation=Ibyte_To_Complex
InputFilter1.implementation=Pass_Through
InputFilter1.item_type=gr_complex
Resampler1.implementation=Pass_Through
Resampler1.item_type=gr_complex
;######### CHANNELS GLOBAL CONFIG ############
Channels.in_acquisition=5
Channels_2S.count=5
Channels_2G.count=5
;# Defining GLONASS satellites
Channel0.RF_channel_ID=0
Channel0.signal=2S
Channel1.RF_channel_ID=0
Channel1.signal=2S
Channel2.RF_channel_ID=0
Channel2.signal=2S
Channel3.RF_channel_ID=0
Channel3.signal=2S
Channel4.RF_channel_ID=0
Channel4.signal=2S
Channel5.RF_channel_ID=1
Channel6.RF_channel_ID=1
Channel7.RF_channel_ID=1
Channel8.RF_channel_ID=1
Channel9.RF_channel_ID=1
;######### ACQUISITION GLOBAL CONFIG ############
Acquisition_2S.implementation=GPS_L2_M_PCPS_Acquisition
Acquisition_2S.item_type=gr_complex
Acquisition_2S.threshold=0.0
Acquisition_2S.pfa=0.00001
Acquisition_2S.if=0
Acquisition_2S.doppler_max=10000
Acquisition_2S.doppler_step=60
Acquisition_2S.max_dwells=1
Acquisition_2G.implementation=GLONASS_L2_CA_PCPS_Acquisition
Acquisition_2G.item_type=gr_complex
Acquisition_2G.threshold=0.0
Acquisition_2G.pfa=0.00001
Acquisition_2G.if=0
Acquisition_2G.doppler_max=10000
Acquisition_2G.doppler_step=250
Acquisition_2G.dump=false;
Acquisition_2G.dump_filename=/archive/glo_acquisition.dat
;######### TRACKING GLOBAL CONFIG ############
Tracking_2S.implementation=GPS_L2_M_DLL_PLL_Tracking
Tracking_2S.item_type=gr_complex
Tracking_2S.if=0
Tracking_2S.early_late_space_chips=0.5
Tracking_2S.pll_bw_hz=2.0;
Tracking_2S.dll_bw_hz=0.250;
Tracking_2S.order=2;
Tracking_2S.dump=false;
Tracking_2S.dump_filename=/archive/gps_tracking_ch_
Tracking_2G.implementation=GLONASS_L2_CA_DLL_PLL_Tracking
Tracking_2G.item_type=gr_complex
Tracking_2G.if=0
Tracking_2G.early_late_space_chips=0.5
Tracking_2G.pll_bw_hz=25.0;
Tracking_2G.dll_bw_hz=3.0;
Tracking_2G.dump=false;
Tracking_2G.dump_filename=/archive/glo_tracking_ch_
;######### TELEMETRY DECODER GPS CONFIG ############
TelemetryDecoder_2S.implementation=GPS_L2C_Telemetry_Decoder
TelemetryDecoder_2G.implementation=GLONASS_L2_CA_Telemetry_Decoder
;######### OBSERVABLES CONFIG ############
Observables.implementation=Hybrid_Observables
Observables.dump=false;
Observables.dump_filename=/archive/gnss_observables.dat
;######### PVT CONFIG ############
PVT.implementation=RTKLIB_PVT
PVT.output_rate_ms=100
PVT.display_rate_ms=500
PVT.trop_model=Saastamoinen
PVT.flag_rtcm_server=true
PVT.flag_rtcm_tty_port=false
PVT.rtcm_dump_devname=/dev/pts/1
PVT.rtcm_tcp_port=2101
PVT.rtcm_MT1019_rate_ms=5000
PVT.rtcm_MT1045_rate_ms=5000
PVT.rtcm_MT1097_rate_ms=1000
PVT.rtcm_MT1077_rate_ms=1000
PVT.rinex_version=3

73
conf/gnss-sdr_GLONASS_L2_CA_ibyte.conf Normal file
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@ -0,0 +1,73 @@
[GNSS-SDR]
;######### GLOBAL OPTIONS ##################
GNSS-SDR.internal_fs_sps=6625000
;######### SIGNAL_SOURCE CONFIG ############
SignalSource.implementation=File_Signal_Source
SignalSource.filename=/media/dmiralles/Seagate Backup Plus Drive/GNSS Data/NT1065_GLONASS_L2_20160831_fs6625e6_60e3_schar_1m.bin ; <- PUT YOUR FILE HERE
SignalSource.item_type=ibyte
SignalSource.sampling_frequency=6625000
SignalSource.samples=0
SignalSource.dump=false;
SignalSource.dump_filename=/archive/signal_glonass.bin
;######### SIGNAL_CONDITIONER CONFIG ############
SignalConditioner.implementation=Signal_Conditioner
DataTypeAdapter.implementation=Ibyte_To_Complex
InputFilter.implementation=Pass_Through
InputFilter.item_type=gr_complex
Resampler.implementation=Pass_Through
Resampler.item_type=gr_complex
;######### CHANNELS GLOBAL CONFIG ############
Channel.signal=2G
Channels.in_acquisition=1
Channels_2G.count=5
;######### ACQUISITION GLOBAL CONFIG ############
Acquisition_2G.implementation=GLONASS_L2_CA_PCPS_Acquisition
Acquisition_2G.item_type=gr_complex
Acquisition_2G.threshold=0.0
Acquisition_2G.pfa=0.0001
Acquisition_2G.if=0
Acquisition_2G.doppler_max=10000
Acquisition_2G.doppler_step=250
Acquisition_2G.dump=true;
Acquisition_2G.dump_filename=/archive/glo_acquisition.dat
;Acquisition_2G.coherent_integration_time_ms=1
;Acquisition_2G.max_dwells = 5
;######### TRACKING GLOBAL CONFIG ############
Tracking_2G.implementation=GLONASS_L2_CA_DLL_PLL_Tracking
Tracking_2G.item_type=gr_complex
Tracking_2G.if=0
Tracking_2G.early_late_space_chips=0.5
Tracking_2G.pll_bw_hz=20.0;
Tracking_2G.dll_bw_hz=2.0;
Tracking_2G.dump=true;
Tracking_2G.dump_filename=/archive/glo_tracking_ch_
;######### TELEMETRY DECODER GPS CONFIG ############
TelemetryDecoder_2G.implementation=GLONASS_L2_CA_Telemetry_Decoder
;######### OBSERVABLES CONFIG ############
Observables.implementation=Hybrid_Observables
Observables.dump=true;
Observables.dump_filename=/archive/glo_observables.dat
;######### PVT CONFIG ############
PVT.implementation=RTKLIB_PVT
PVT.positioning_mode=Single
PVT.output_rate_ms=100
PVT.display_rate_ms=500
PVT.trop_model=Saastamoinen
PVT.flag_rtcm_server=false
PVT.flag_rtcm_tty_port=false
PVT.rtcm_dump_devname=/dev/pts/1
PVT.rtcm_tcp_port=2101
PVT.rtcm_MT1019_rate_ms=5000
PVT.rtcm_MT1045_rate_ms=5000
PVT.rtcm_MT1097_rate_ms=1000
PVT.rtcm_MT1077_rate_ms=1000
PVT.rinex_version=2

83
conf/gnss-sdr_GLONASS_L2_CA_ibyte_coh_trk.conf Normal file
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@ -0,0 +1,83 @@
[GNSS-SDR]
;######### GLOBAL OPTIONS ##################
GNSS-SDR.internal_fs_sps=6625000
;######### SIGNAL_SOURCE CONFIG ############
SignalSource.implementation=File_Signal_Source
SignalSource.filename=/archive/NT1065_GLONASS_L1_20160923_fs6625e6_if0e3_schar.bin ; <- PUT YOUR FILE HERE
SignalSource.item_type=ibyte
SignalSource.sampling_frequency=6625000
SignalSource.samples=0
SignalSource.dump=false;
SignalSource.dump_filename=/archive/signal_glonass.bin
;######### SIGNAL_CONDITIONER CONFIG ############
SignalConditioner.implementation=Signal_Conditioner
DataTypeAdapter.implementation=Ibyte_To_Complex
InputFilter.implementation=Pass_Through
InputFilter.item_type=gr_complex
Resampler.implementation=Pass_Through
Resampler.item_type=gr_complex
;######### CHANNELS GLOBAL CONFIG ############
Channel.signal=1G
Channels.in_acquisition=2
Channels_1G.count=8
;Channel0.satellite=24 ; k=2
;Channel1.satellite=1 ; k=1
;Channel2.satellite=2 ; k=-4
;Channel3.satellite=20 ; k=-5
;Channel4.satellite=21 ; k=4
;######### ACQUISITION GLOBAL CONFIG ############
Acquisition_1G.implementation=GLONASS_L1_CA_PCPS_Acquisition
Acquisition_1G.item_type=gr_complex
Acquisition_1G.threshold=0.0
Acquisition_1G.pfa=0.0001
Acquisition_1G.if=0
Acquisition_1G.doppler_max=10000
Acquisition_1G.doppler_step=250
Acquisition_1G.dump=false;
Acquisition_1G.dump_filename=/archive/glo_acquisition.dat
;Acquisition_1G.coherent_integration_time_ms=1
;Acquisition_1G.max_dwells = 5
;######### TRACKING GLOBAL CONFIG ############
Tracking_1G.implementation=GLONASS_L1_CA_DLL_PLL_C_Aid_Tracking
Tracking_1G.item_type=gr_complex
Tracking_1G.if=0
Tracking_1G.early_late_space_chips=0.5
Tracking_1G.pll_bw_hz=40.0;
Tracking_1G.dll_bw_hz=3.0;
Tracking_1G.pll_bw_narrow_hz = 25.0;
Tracking_1G.dll_bw_narrow_hz = 2.0;
Tracking_1G.extend_correlation_ms = 1;
Tracking_1G.dump=false;
Tracking_1G.dump_filename=/archive/glo_tracking_ch_
;######### TELEMETRY DECODER GPS CONFIG ############
TelemetryDecoder_1G.implementation=GLONASS_L1_CA_Telemetry_Decoder
;######### OBSERVABLES CONFIG ############
Observables.implementation=Hybrid_Observables
Observables.dump=false
Observables.dump_filename=/archive/glo_observables.dat
;######### PVT CONFIG ############
PVT.implementation=RTKLIB_PVT
PVT.positioning_mode=Single
PVT.output_rate_ms=100
PVT.display_rate_ms=500
PVT.trop_model=Saastamoinen
PVT.flag_rtcm_server=true
PVT.flag_rtcm_tty_port=false
PVT.rtcm_dump_devname=/dev/pts/1
PVT.rtcm_tcp_port=2101
PVT.rtcm_MT1019_rate_ms=5000
PVT.rtcm_MT1045_rate_ms=5000
PVT.rtcm_MT1097_rate_ms=1000
PVT.rtcm_MT1077_rate_ms=1000
PVT.rinex_version=2

52
src/algorithms/PVT/adapters/rtklib_pvt.cc
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@ -178,40 +178,44 @@ RtklibPvt::RtklibPvt(ConfigurationInterface* configuration,
int gal_E5a_count = configuration->property("Channels_5X.count", 0);
int gal_E5b_count = configuration->property("Channels_7X.count", 0);
int glo_1G_count = configuration->property("Channels_1G.count", 0);
int glo_2G_count = configuration->property("Channels_2G.count", 0);
unsigned int type_of_receiver = 0;
// *******************WARNING!!!!!!!***********
// GPS L5 only configurable for single frequency, single system at the moment!!!!!!
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 1;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 2;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count != 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 3;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 4;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count != 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 5;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count != 0) && (glo_1G_count == 0)) type_of_receiver = 6;
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 1;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 2;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count != 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 3;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 4;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count != 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 5;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count != 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 6;
if ((gps_1C_count != 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 7;
if ((gps_1C_count != 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 7;
//if( (gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0)) type_of_receiver = 8;
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 9;
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count != 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 10;
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count != 0) && (glo_1G_count == 0)) type_of_receiver = 11;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 12;
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 9;
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count != 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 10;
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count != 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 11;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 12;
//if( (gps_1C_count == 0) && (gps_2S_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0)) type_of_receiver = 13;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count != 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 14;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count != 0) && (glo_1G_count == 0)) type_of_receiver = 15;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count != 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 14;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count != 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 15;
//if( (gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0)) type_of_receiver = 16;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count != 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 17;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count != 0) && (glo_1G_count == 0)) type_of_receiver = 18;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count != 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 17;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count != 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 18;
//if( (gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0)) type_of_receiver = 19;
//if( (gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0)) type_of_receiver = 20;
if ((gps_1C_count != 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0)) type_of_receiver = 21;
if ((gps_1C_count != 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count == 0)) type_of_receiver = 21;
//if( (gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count = 0)) type_of_receiver = 22;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count != 0)) type_of_receiver = 23;
//if( (gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2R_count != 0)) type_of_receiver = 24;
//if( (gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count != 0) && (glo_1G_count != 0)) type_of_receiver = 25;
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count != 0)) type_of_receiver = 26;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count != 0)) type_of_receiver = 27;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count != 0)) type_of_receiver = 28;
if( (gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count != 0)) type_of_receiver = 24;
if( (gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count != 0) && (glo_2G_count != 0)) type_of_receiver = 25;
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count != 0) && (glo_2G_count == 0)) type_of_receiver = 26;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count != 0) && (glo_2G_count == 0)) type_of_receiver = 27;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count != 0) && (glo_2G_count == 0)) type_of_receiver = 28;
if ((gps_1C_count != 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count != 0)) type_of_receiver = 29;
if ((gps_1C_count == 0) && (gps_2S_count == 0) && (gps_L5_count == 0) && (gal_1B_count != 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count != 0)) type_of_receiver = 30;
if ((gps_1C_count == 0) && (gps_2S_count != 0) && (gps_L5_count == 0) && (gal_1B_count == 0) && (gal_E5a_count == 0) && (gal_E5b_count == 0) && (glo_1G_count == 0) && (glo_2G_count != 0)) type_of_receiver = 31;
//RTKLIB PVT solver options
// Settings 1
int positioning_mode = -1;
@ -236,9 +240,9 @@ RtklibPvt::RtklibPvt(ConfigurationInterface* configuration,
int num_bands = 0;
if ((gps_1C_count > 0) || (gal_1B_count > 0) || (glo_1G_count > 0)) num_bands = 1;
if (((gps_1C_count > 0) || (gal_1B_count > 0) || (glo_1G_count > 0)) && (gps_2S_count > 0)) num_bands = 2;
if (((gps_1C_count > 0) || (gal_1B_count > 0) || (glo_1G_count > 0)) && ((gps_2S_count > 0) || (glo_2G_count > 0))) num_bands = 2;
if (((gps_1C_count > 0) || (gal_1B_count > 0) || (glo_1G_count > 0)) && ((gal_E5a_count > 0) || (gal_E5b_count > 0) || (gps_L5_count > 0))) num_bands = 2;
if (((gps_1C_count > 0) || (gal_1B_count > 0) || (glo_1G_count > 0)) && (gps_2S_count > 0) && ((gal_E5a_count > 0) || (gal_E5b_count > 0) || (gps_L5_count > 0))) num_bands = 3;
if (((gps_1C_count > 0) || (gal_1B_count > 0) || (glo_1G_count > 0)) && ((gps_2S_count > 0) || (glo_2G_count > 0)) && ((gal_E5a_count > 0) || (gal_E5b_count > 0) || (gps_L5_count > 0))) num_bands = 3;
int number_of_frequencies = configuration->property(role + ".num_bands", num_bands); /* (1:L1, 2:L1+L2, 3:L1+L2+L5) */
if ((number_of_frequencies < 1) || (number_of_frequencies > 3))
@ -321,7 +325,7 @@ RtklibPvt::RtklibPvt(ConfigurationInterface* configuration,
int nsys = 0;
if ((gps_1C_count > 0) || (gps_2S_count > 0) || (gps_L5_count > 0)) nsys += SYS_GPS;
if ((gal_1B_count > 0) || (gal_E5a_count > 0) || (gal_E5b_count > 0)) nsys += SYS_GAL;
if ((glo_1G_count > 0)) nsys += SYS_GLO;
if ((glo_1G_count > 0) || (glo_2G_count > 0)) nsys += SYS_GLO;
int navigation_system = configuration->property(role + ".navigation_system", nsys); /* (SYS_XXX) see src/algorithms/libs/rtklib/rtklib.h */
if ((navigation_system < 1) || (navigation_system > 255)) /* GPS: 1 SBAS: 2 GPS+SBAS: 3 Galileo: 8 Galileo+GPS: 9 GPS+SBAS+Galileo: 11 All: 255 */
{

342
src/algorithms/PVT/gnuradio_blocks/rtklib_pvt_cc.cc
View File

@ -700,6 +700,9 @@ int rtklib_pvt_cc::work(int noutput_items, gr_vector_const_void_star& input_item
* 26 | GPS L1 C/A + GLONASS L1 C/A
* 27 | Galileo E1B + GLONASS L1 C/A
* 28 | GPS L2C + GLONASS L1 C/A
* 29 | GPS L1 C/A + GLONASS L2 C/A
* 30 | Galileo E1B + GLONASS L2 C/A
* 31 | GPS L2C + GLONASS L2 C/A
*/
// ####################### RINEX FILES #################
@ -901,6 +904,43 @@ int rtklib_pvt_cc::work(int noutput_items, gr_vector_const_void_star& input_item
b_rinex_header_written = true; // do not write header anymore
}
}
if (type_of_rx == 29) // GPS L1 C/A + GLONASS L2 C/A
{
if ((glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend()) && (gps_ephemeris_iter != d_ls_pvt->gps_ephemeris_map.cend()))
{
std::string glo_signal("2G");
rp->rinex_obs_header(rp->obsFile, gps_ephemeris_iter->second, glonass_gnav_ephemeris_iter->second, d_rx_time, glo_signal);
if (d_rinex_version == 3)
rp->rinex_nav_header(rp->navMixFile, d_ls_pvt->gps_iono, d_ls_pvt->gps_utc_model, d_ls_pvt->glonass_gnav_utc_model, d_ls_pvt->glonass_gnav_almanac);
if (d_rinex_version == 2)
{
rp->rinex_nav_header(rp->navFile, d_ls_pvt->gps_iono, d_ls_pvt->gps_utc_model);
rp->rinex_nav_header(rp->navGloFile, d_ls_pvt->glonass_gnav_utc_model, glonass_gnav_ephemeris_iter->second);
}
b_rinex_header_written = true; // do not write header anymore
}
}
if (type_of_rx == 30) // Galileo E1B + GLONASS L2 C/A
{
if ((glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend()) && (galileo_ephemeris_iter != d_ls_pvt->galileo_ephemeris_map.cend()))
{
std::string glo_signal("2G");
std::string gal_signal("1B");
rp->rinex_obs_header(rp->obsFile, galileo_ephemeris_iter->second, glonass_gnav_ephemeris_iter->second, d_rx_time, glo_signal, gal_signal);
rp->rinex_nav_header(rp->navMixFile, d_ls_pvt->galileo_iono, d_ls_pvt->galileo_utc_model, d_ls_pvt->galileo_almanac, d_ls_pvt->glonass_gnav_utc_model, d_ls_pvt->glonass_gnav_almanac);
b_rinex_header_written = true; // do not write header anymore
}
}
if (type_of_rx == 31) // GPS L2C + GLONASS L2 C/A
{
if ((glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend()) && (gps_cnav_ephemeris_iter != d_ls_pvt->gps_cnav_ephemeris_map.cend()))
{
std::string glo_signal("2G");
rp->rinex_obs_header(rp->obsFile, gps_cnav_ephemeris_iter->second, glonass_gnav_ephemeris_iter->second, d_rx_time, glo_signal);
rp->rinex_nav_header(rp->navMixFile, d_ls_pvt->gps_cnav_iono, d_ls_pvt->gps_cnav_utc_model, d_ls_pvt->glonass_gnav_utc_model, d_ls_pvt->glonass_gnav_almanac);
b_rinex_header_written = true; // do not write header anymore
}
}
}
if (b_rinex_header_written) // The header is already written, we can now log the navigation message data
{
@ -956,6 +996,24 @@ int rtklib_pvt_cc::work(int noutput_items, gr_vector_const_void_star& input_item
{
rp->log_rinex_nav(rp->navMixFile, d_ls_pvt->gps_cnav_ephemeris_map, d_ls_pvt->glonass_gnav_ephemeris_map);
}
if (type_of_rx == 29) // GPS L1 C/A + GLONASS L2 C/A
{
if (d_rinex_version == 3)
rp->log_rinex_nav(rp->navMixFile, d_ls_pvt->gps_ephemeris_map, d_ls_pvt->glonass_gnav_ephemeris_map);
if (d_rinex_version == 2)
{
rp->log_rinex_nav(rp->navFile, d_ls_pvt->gps_ephemeris_map);
rp->log_rinex_nav(rp->navGloFile, d_ls_pvt->glonass_gnav_ephemeris_map);
}
}
if (type_of_rx == 30) // Galileo E1B + GLONASS L2 C/A
{
rp->log_rinex_nav(rp->navMixFile, d_ls_pvt->galileo_ephemeris_map, d_ls_pvt->glonass_gnav_ephemeris_map);
}
if (type_of_rx == 31) // GPS L2C + GLONASS L2 C/A
{
rp->log_rinex_nav(rp->navMixFile, d_ls_pvt->gps_cnav_ephemeris_map, d_ls_pvt->glonass_gnav_ephemeris_map);
}
}
galileo_ephemeris_iter = d_ls_pvt->galileo_ephemeris_map.cbegin();
gps_ephemeris_iter = d_ls_pvt->gps_ephemeris_map.cbegin();
@ -1173,6 +1231,45 @@ int rtklib_pvt_cc::work(int noutput_items, gr_vector_const_void_star& input_item
b_rinex_header_updated = true; // do not write header anymore
}
}
if (type_of_rx == 29) // GPS L1 C/A + GLONASS L2 C/A
{
if ((glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.end()) && (gps_ephemeris_iter != d_ls_pvt->gps_ephemeris_map.end()))
{
rp->log_rinex_obs(rp->obsFile, gps_ephemeris_iter->second, glonass_gnav_ephemeris_iter->second, d_rx_time, gnss_observables_map);
}
if (!b_rinex_header_updated && (d_ls_pvt->gps_utc_model.d_A0 != 0))
{
rp->update_obs_header(rp->obsFile, d_ls_pvt->gps_utc_model);
rp->update_nav_header(rp->navMixFile, d_ls_pvt->gps_iono, d_ls_pvt->gps_utc_model, d_ls_pvt->glonass_gnav_utc_model, d_ls_pvt->glonass_gnav_almanac);
b_rinex_header_updated = true; // do not write header anymore
}
}
if (type_of_rx == 30) // Galileo E1B + GLONASS L2 C/A
{
if ((glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.end()) && (galileo_ephemeris_iter != d_ls_pvt->galileo_ephemeris_map.end()))
{
rp->log_rinex_obs(rp->obsFile, galileo_ephemeris_iter->second, glonass_gnav_ephemeris_iter->second, d_rx_time, gnss_observables_map);
}
if (!b_rinex_header_updated && (d_ls_pvt->galileo_utc_model.A0_6 != 0))
{
rp->update_obs_header(rp->obsFile, d_ls_pvt->galileo_utc_model);
rp->update_nav_header(rp->navMixFile, d_ls_pvt->galileo_iono, d_ls_pvt->galileo_utc_model, d_ls_pvt->galileo_almanac, d_ls_pvt->glonass_gnav_utc_model, d_ls_pvt->glonass_gnav_almanac);
b_rinex_header_updated = true; // do not write header anymore
}
}
if (type_of_rx == 31) // GPS L2C + GLONASS L2 C/A
{
if ((glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.end()) && (gps_cnav_ephemeris_iter != d_ls_pvt->gps_cnav_ephemeris_map.end()))
{
rp->log_rinex_obs(rp->obsFile, gps_cnav_ephemeris_iter->second, glonass_gnav_ephemeris_iter->second, d_rx_time, gnss_observables_map);
}
if (!b_rinex_header_updated && (d_ls_pvt->gps_cnav_utc_model.d_A0 != 0))
{
rp->update_obs_header(rp->obsFile, d_ls_pvt->gps_cnav_utc_model);
rp->update_nav_header(rp->navMixFile, d_ls_pvt->gps_cnav_iono, d_ls_pvt->gps_cnav_utc_model, d_ls_pvt->glonass_gnav_utc_model, d_ls_pvt->glonass_gnav_almanac);
b_rinex_header_updated = true; // do not write header anymore
}
}
}
}
@ -1452,6 +1549,136 @@ int rtklib_pvt_cc::work(int noutput_items, gr_vector_const_void_star& input_item
}
}
}
if (type_of_rx == 29) // GPS L1 C/A + GLONASS L2 C/A
{
if (flag_write_RTCM_1019_output == true)
{
for (gps_ephemeris_iter = d_ls_pvt->gps_ephemeris_map.cbegin(); gps_ephemeris_iter != d_ls_pvt->gps_ephemeris_map.cend(); gps_ephemeris_iter++)
{
d_rtcm_printer->Print_Rtcm_MT1019(gps_ephemeris_iter->second);
}
}
if (flag_write_RTCM_1020_output == true)
{
for (std::map<int, Glonass_Gnav_Ephemeris>::const_iterator glonass_gnav_ephemeris_iter = d_ls_pvt->glonass_gnav_ephemeris_map.cbegin(); glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend(); glonass_gnav_ephemeris_iter++)
{
d_rtcm_printer->Print_Rtcm_MT1020(glonass_gnav_ephemeris_iter->second, d_ls_pvt->glonass_gnav_utc_model);
}
}
if (flag_write_RTCM_MSM_output == true)
{
//gps_ephemeris_iter = d_ls_pvt->gps_ephemeris_map.end();
//galileo_ephemeris_iter = d_ls_pvt->galileo_ephemeris_map.end();
unsigned int i = 0;
for (gnss_observables_iter = gnss_observables_map.begin(); gnss_observables_iter != gnss_observables_map.end(); gnss_observables_iter++)
{
std::string system(&gnss_observables_iter->second.System, 1);
if (gps_channel == 0)
{
if (system.compare("G") == 0)
{
// This is a channel with valid GPS signal
gps_ephemeris_iter = d_ls_pvt->gps_ephemeris_map.find(gnss_observables_iter->second.PRN);
if (gps_ephemeris_iter != d_ls_pvt->gps_ephemeris_map.cend())
{
gps_channel = i;
}
}
}
if (glo_channel == 0)
{
if (system.compare("R") == 0)
{
glonass_gnav_ephemeris_iter = d_ls_pvt->glonass_gnav_ephemeris_map.find(gnss_observables_iter->second.PRN);
if (glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend())
{
glo_channel = i;
}
}
}
i++;
}
if (flag_write_RTCM_MSM_output == true)
{
if (glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend())
{
d_rtcm_printer->Print_Rtcm_MSM(7, {}, {}, {}, glonass_gnav_ephemeris_iter->second, d_rx_time, gnss_observables_map, 0, 0, 0, 0, 0);
}
}
if (flag_write_RTCM_MSM_output == true)
{
if (gps_ephemeris_iter != d_ls_pvt->gps_ephemeris_map.cend())
{
d_rtcm_printer->Print_Rtcm_MSM(7, gps_ephemeris_iter->second, {}, {}, {}, d_rx_time, gnss_observables_map, 0, 0, 0, 0, 0);
}
}
}
}
if (type_of_rx == 30) // GLONASS L2 C/A + Galileo E1B
{
if (flag_write_RTCM_1020_output == true)
{
for (std::map<int, Glonass_Gnav_Ephemeris>::const_iterator glonass_gnav_ephemeris_iter = d_ls_pvt->glonass_gnav_ephemeris_map.cbegin(); glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend(); glonass_gnav_ephemeris_iter++)
{
d_rtcm_printer->Print_Rtcm_MT1020(glonass_gnav_ephemeris_iter->second, d_ls_pvt->glonass_gnav_utc_model);
}
}
if (flag_write_RTCM_1045_output == true)
{
for (galileo_ephemeris_iter = d_ls_pvt->galileo_ephemeris_map.cbegin(); galileo_ephemeris_iter != d_ls_pvt->galileo_ephemeris_map.cend(); galileo_ephemeris_iter++)
{
d_rtcm_printer->Print_Rtcm_MT1045(galileo_ephemeris_iter->second);
}
}
if (flag_write_RTCM_MSM_output == true)
{
//gps_ephemeris_iter = d_ls_pvt->gps_ephemeris_map.end();
//galileo_ephemeris_iter = d_ls_pvt->galileo_ephemeris_map.end();
unsigned int i = 0;
for (gnss_observables_iter = gnss_observables_map.cbegin(); gnss_observables_iter != gnss_observables_map.cend(); gnss_observables_iter++)
{
std::string system(&gnss_observables_iter->second.System, 1);
if (gal_channel == 0)
{
if (system.compare("E") == 0)
{
// This is a channel with valid GPS signal
galileo_ephemeris_iter = d_ls_pvt->galileo_ephemeris_map.find(gnss_observables_iter->second.PRN);
if (galileo_ephemeris_iter != d_ls_pvt->galileo_ephemeris_map.cend())
{
gal_channel = i;
}
}
}
if (glo_channel == 0)
{
if (system.compare("R") == 0)
{
glonass_gnav_ephemeris_iter = d_ls_pvt->glonass_gnav_ephemeris_map.find(gnss_observables_iter->second.PRN);
if (glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.end())
{
glo_channel = i;
}
}
}
i++;
}
if (flag_write_RTCM_MSM_output == true)
{
if (galileo_ephemeris_iter != d_ls_pvt->galileo_ephemeris_map.end())
{
d_rtcm_printer->Print_Rtcm_MSM(7, {}, {}, galileo_ephemeris_iter->second, {}, d_rx_time, gnss_observables_map, 0, 0, 0, 0, 0);
}
}
if (flag_write_RTCM_MSM_output == true)
{
if (glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.end())
{
d_rtcm_printer->Print_Rtcm_MSM(7, {}, {}, {}, glonass_gnav_ephemeris_iter->second, d_rx_time, gnss_observables_map, 0, 0, 0, 0, 0);
}
}
}
}
}
if (!b_rtcm_writing_started) // the first time
@ -1690,6 +1917,121 @@ int rtklib_pvt_cc::work(int noutput_items, gr_vector_const_void_star& input_item
d_rtcm_printer->Print_Rtcm_MSM(7, {}, {}, {}, glonass_gnav_ephemeris_iter->second, d_rx_time, gnss_observables_map, 0, 0, 0, 0, 0);
}
}
if (type_of_rx == 29) // GPS L1 C/A + GLONASS L2 C/A
{
if (d_rtcm_MT1019_rate_ms != 0) // allows deactivating messages by setting rate = 0
{
for (gps_ephemeris_iter = d_ls_pvt->gps_ephemeris_map.cbegin(); gps_ephemeris_iter != d_ls_pvt->gps_ephemeris_map.cend(); gps_ephemeris_iter++)
{
d_rtcm_printer->Print_Rtcm_MT1019(gps_ephemeris_iter->second);
}
}
if (d_rtcm_MT1020_rate_ms != 0) // allows deactivating messages by setting rate = 0
{
for (std::map<int, Glonass_Gnav_Ephemeris>::const_iterator glonass_gnav_ephemeris_iter = d_ls_pvt->glonass_gnav_ephemeris_map.cbegin(); glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend(); glonass_gnav_ephemeris_iter++)
{
d_rtcm_printer->Print_Rtcm_MT1020(glonass_gnav_ephemeris_iter->second, d_ls_pvt->glonass_gnav_utc_model);
}
}
//gps_ephemeris_iter = d_ls_pvt->gps_ephemeris_map.end();
//galileo_ephemeris_iter = d_ls_pvt->galileo_ephemeris_map.end();
unsigned int i = 0;
for (gnss_observables_iter = gnss_observables_map.cbegin(); gnss_observables_iter != gnss_observables_map.cend(); gnss_observables_iter++)
{
std::string system(&gnss_observables_iter->second.System, 1);
if (gps_channel == 0)
{
if (system.compare("G") == 0)
{
// This is a channel with valid GPS signal
gps_ephemeris_iter = d_ls_pvt->gps_ephemeris_map.find(gnss_observables_iter->second.PRN);
if (gps_ephemeris_iter != d_ls_pvt->gps_ephemeris_map.cend())
{
gps_channel = i;
}
}
}
if (glo_channel == 0)
{
if (system.compare("R") == 0)
{
glonass_gnav_ephemeris_iter = d_ls_pvt->glonass_gnav_ephemeris_map.find(gnss_observables_iter->second.PRN);
if (glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend())
{
glo_channel = i;
}
}
}
i++;
}
if (glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend())
{
d_rtcm_printer->Print_Rtcm_MSM(7, {}, {}, {}, glonass_gnav_ephemeris_iter->second, d_rx_time, gnss_observables_map, 0, 0, 0, 0, 0);
}
if (gps_ephemeris_iter != d_ls_pvt->gps_ephemeris_map.cend())
{
d_rtcm_printer->Print_Rtcm_MSM(7, gps_ephemeris_iter->second, {}, {}, {}, d_rx_time, gnss_observables_map, 0, 0, 0, 0, 0);
}
b_rtcm_writing_started = true;
}
if (type_of_rx == 30) // GLONASS L2 C/A + Galileo E1B
{
if (d_rtcm_MT1020_rate_ms != 0) // allows deactivating messages by setting rate = 0
{
for (std::map<int, Glonass_Gnav_Ephemeris>::const_iterator glonass_gnav_ephemeris_iter = d_ls_pvt->glonass_gnav_ephemeris_map.cbegin(); glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.cend(); glonass_gnav_ephemeris_iter++)
{
d_rtcm_printer->Print_Rtcm_MT1020(glonass_gnav_ephemeris_iter->second, d_ls_pvt->glonass_gnav_utc_model);
}
}
if (d_rtcm_MT1045_rate_ms != 0) // allows deactivating messages by setting rate = 0
{
for (galileo_ephemeris_iter = d_ls_pvt->galileo_ephemeris_map.cbegin(); galileo_ephemeris_iter != d_ls_pvt->galileo_ephemeris_map.cend(); galileo_ephemeris_iter++)
{
d_rtcm_printer->Print_Rtcm_MT1045(galileo_ephemeris_iter->second);
}
}
unsigned int i = 0;
for (gnss_observables_iter = gnss_observables_map.cbegin(); gnss_observables_iter != gnss_observables_map.cend(); gnss_observables_iter++)
{
std::string system(&gnss_observables_iter->second.System, 1);
if (gal_channel == 0)
{
if (system.compare("E") == 0)
{
// This is a channel with valid GPS signal
galileo_ephemeris_iter = d_ls_pvt->galileo_ephemeris_map.find(gnss_observables_iter->second.PRN);
if (galileo_ephemeris_iter != d_ls_pvt->galileo_ephemeris_map.cend())
{
gal_channel = i;
}
}
}
if (glo_channel == 0)
{
if (system.compare("R") == 0)
{
glonass_gnav_ephemeris_iter = d_ls_pvt->glonass_gnav_ephemeris_map.find(gnss_observables_iter->second.PRN);
if (glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.end())
{
glo_channel = i;
}
}
}
i++;
}
if (galileo_ephemeris_iter != d_ls_pvt->galileo_ephemeris_map.end())
{
d_rtcm_printer->Print_Rtcm_MSM(7, {}, {}, galileo_ephemeris_iter->second, {}, d_rx_time, gnss_observables_map, 0, 0, 0, 0, 0);
}
if (glonass_gnav_ephemeris_iter != d_ls_pvt->glonass_gnav_ephemeris_map.end())
{
d_rtcm_printer->Print_Rtcm_MSM(7, {}, {}, {}, glonass_gnav_ephemeris_iter->second, d_rx_time, gnss_observables_map, 0, 0, 0, 0, 0);
}
}
}
}
}

2
src/algorithms/PVT/libs/rinex_printer.h
View File

@ -57,7 +57,6 @@
#include "glonass_gnav_navigation_message.h"
#include "GPS_L1_CA.h"
#include "Galileo_E1.h"
#include "GLONASS_L1_CA.h"
#include "gnss_synchro.h"
#include <boost/date_time/posix_time/posix_time.hpp>
#include <string>
@ -65,6 +64,7 @@
#include <sstream> // for stringstream
#include <iomanip> // for setprecision
#include <map>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
class Sbas_Raw_Msg;

2
src/algorithms/PVT/libs/rtklib_solver.cc
View File

@ -55,8 +55,8 @@
#include "rtklib_conversions.h"
#include "GPS_L1_CA.h"
#include "Galileo_E1.h"
#include "GLONASS_L1_CA.h"
#include <glog/logging.h>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
using google::LogMessage;

1
src/algorithms/acquisition/adapters/CMakeLists.txt
View File

@ -33,6 +33,7 @@ set(ACQ_ADAPTER_SOURCES
galileo_e5a_noncoherent_iq_acquisition_caf.cc
galileo_e5a_pcps_acquisition.cc
glonass_l1_ca_pcps_acquisition.cc
glonass_l2_ca_pcps_acquisition.cc
)
if(ENABLE_FPGA)

2
src/algorithms/acquisition/adapters/glonass_l1_ca_pcps_acquisition.cc
View File

@ -34,10 +34,10 @@
#include "glonass_l1_ca_pcps_acquisition.h"
#include "configuration_interface.h"
#include "glonass_l1_signal_processing.h"
#include "GLONASS_L1_CA.h"
#include "gnss_sdr_flags.h"
#include <boost/math/distributions/exponential.hpp>
#include <glog/logging.h>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
using google::LogMessage;

312
src/algorithms/acquisition/adapters/glonass_l2_ca_pcps_acquisition.cc Normal file
View File

@ -0,0 +1,312 @@
/*!
* \file glonass_l2_ca_pcps_acquisition.cc
* \brief Adapts a PCPS acquisition block to an AcquisitionInterface for
* Glonass L2 C/A signals
* \author Damian Miralles, 2018, dmiralles2009@gmail.com
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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 "glonass_l2_ca_pcps_acquisition.h"
#include "configuration_interface.h"
#include "glonass_l2_signal_processing.h"
#include "GLONASS_L1_L2_CA.h"
#include "gnss_sdr_flags.h"
#include <boost/math/distributions/exponential.hpp>
#include <glog/logging.h>
using google::LogMessage;
GlonassL2CaPcpsAcquisition::GlonassL2CaPcpsAcquisition(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams) : role_(role), in_streams_(in_streams), out_streams_(out_streams)
{
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);
long fs_in_deprecated = configuration_->property("GNSS-SDR.internal_fs_hz", 2048000);
fs_in_ = configuration_->property("GNSS-SDR.internal_fs_sps", fs_in_deprecated);
if_ = configuration_->property(role + ".if", 0);
dump_ = configuration_->property(role + ".dump", false);
blocking_ = configuration_->property(role + ".blocking", true);
doppler_max_ = configuration_->property(role + ".doppler_max", 5000);
if (FLAGS_doppler_max != 0) doppler_max_ = FLAGS_doppler_max;
sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 1);
bit_transition_flag_ = configuration_->property(role + ".bit_transition_flag", false);
use_CFAR_algorithm_flag_ = configuration_->property(role + ".use_CFAR_algorithm", true); //will be false in future versions
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 -------------------------
code_length_ = round(fs_in_ / (GLONASS_L2_CA_CODE_RATE_HZ / GLONASS_L2_CA_CODE_LENGTH_CHIPS));
vector_length_ = code_length_ * sampled_ms_;
if (bit_transition_flag_)
{
vector_length_ *= 2;
}
code_ = new gr_complex[vector_length_];
if (item_type_.compare("cshort") == 0)
{
item_size_ = sizeof(lv_16sc_t);
}
else
{
item_size_ = sizeof(gr_complex);
}
acquisition_ = pcps_make_acquisition(sampled_ms_, max_dwells_,
doppler_max_, if_, fs_in_, code_length_, code_length_,
bit_transition_flag_, use_CFAR_algorithm_flag_, dump_, blocking_, dump_filename_, item_size_);
DLOG(INFO) << "acquisition(" << acquisition_->unique_id() << ")";
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_);
DLOG(INFO) << "stream_to_vector(" << stream_to_vector_->unique_id() << ")";
if (item_type_.compare("cbyte") == 0)
{
cbyte_to_float_x2_ = make_complex_byte_to_float_x2();
float_to_complex_ = gr::blocks::float_to_complex::make();
}
channel_ = 0;
threshold_ = 0.0;
doppler_step_ = 0;
gnss_synchro_ = 0;
}
GlonassL2CaPcpsAcquisition::~GlonassL2CaPcpsAcquisition()
{
delete[] code_;
}
void GlonassL2CaPcpsAcquisition::set_channel(unsigned int channel)
{
channel_ = channel;
acquisition_->set_channel(channel_);
}
void GlonassL2CaPcpsAcquisition::set_threshold(float threshold)
{
float pfa = configuration_->property(role_ + ".pfa", 0.0);
if (pfa == 0.0)
{
threshold_ = threshold;
}
else
{
threshold_ = calculate_threshold(pfa);
}
DLOG(INFO) << "Channel " << channel_ << " Threshold = " << threshold_;
acquisition_->set_threshold(threshold_);
}
void GlonassL2CaPcpsAcquisition::set_doppler_max(unsigned int doppler_max)
{
doppler_max_ = doppler_max;
acquisition_->set_doppler_max(doppler_max_);
}
void GlonassL2CaPcpsAcquisition::set_doppler_step(unsigned int doppler_step)
{
doppler_step_ = doppler_step;
acquisition_->set_doppler_step(doppler_step_);
}
void GlonassL2CaPcpsAcquisition::set_gnss_synchro(Gnss_Synchro* gnss_synchro)
{
gnss_synchro_ = gnss_synchro;
acquisition_->set_gnss_synchro(gnss_synchro_);
}
signed int GlonassL2CaPcpsAcquisition::mag()
{
return acquisition_->mag();
}
void GlonassL2CaPcpsAcquisition::init()
{
acquisition_->init();
set_local_code();
}
void GlonassL2CaPcpsAcquisition::set_local_code()
{
std::complex<float>* code = new std::complex<float>[code_length_];
glonass_l2_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_->set_local_code(code_);
delete[] code;
}
void GlonassL2CaPcpsAcquisition::reset()
{
acquisition_->set_active(true);
}
void GlonassL2CaPcpsAcquisition::set_state(int state)
{
acquisition_->set_state(state);
}
float GlonassL2CaPcpsAcquisition::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++;
}
*/
frequency_bins = (2 * doppler_max_ + doppler_step_) / doppler_step_;
DLOG(INFO) << "Channel " << channel_ << " Pfa = " << pfa;
unsigned int ncells = vector_length_ * frequency_bins;
double exponent = 1 / static_cast<double>(ncells);
double val = pow(1.0 - pfa, exponent);
double lambda = static_cast<double>(vector_length_);
boost::math::exponential_distribution<double> mydist(lambda);
float threshold = static_cast<float>(quantile(mydist, val));
return threshold;
}
void GlonassL2CaPcpsAcquisition::connect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_, 0);
}
else if (item_type_.compare("cshort") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_, 0);
}
else if (item_type_.compare("cbyte") == 0)
{
top_block->connect(cbyte_to_float_x2_, 0, float_to_complex_, 0);
top_block->connect(cbyte_to_float_x2_, 1, float_to_complex_, 1);
top_block->connect(float_to_complex_, 0, stream_to_vector_, 0);
top_block->connect(stream_to_vector_, 0, acquisition_, 0);
}
else
{
LOG(WARNING) << item_type_ << " unknown acquisition item type";
}
}
void GlonassL2CaPcpsAcquisition::disconnect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_, 0);
}
else if (item_type_.compare("cshort") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_, 0);
}
else if (item_type_.compare("cbyte") == 0)
{
// Since a byte-based acq implementation is not available,
// we just convert cshorts to gr_complex
top_block->disconnect(cbyte_to_float_x2_, 0, float_to_complex_, 0);
top_block->disconnect(cbyte_to_float_x2_, 1, float_to_complex_, 1);
top_block->disconnect(float_to_complex_, 0, stream_to_vector_, 0);
top_block->disconnect(stream_to_vector_, 0, acquisition_, 0);
}
else
{
LOG(WARNING) << item_type_ << " unknown acquisition item type";
}
}
gr::basic_block_sptr GlonassL2CaPcpsAcquisition::get_left_block()
{
if (item_type_.compare("gr_complex") == 0)
{
return stream_to_vector_;
}
else if (item_type_.compare("cshort") == 0)
{
return stream_to_vector_;
}
else if (item_type_.compare("cbyte") == 0)
{
return cbyte_to_float_x2_;
}
else
{
LOG(WARNING) << item_type_ << " unknown acquisition item type";
return nullptr;
}
}
gr::basic_block_sptr GlonassL2CaPcpsAcquisition::get_right_block()
{
return acquisition_;
}

166
src/algorithms/acquisition/adapters/glonass_l2_ca_pcps_acquisition.h Normal file
View File

@ -0,0 +1,166 @@
/*!
* \file glonass_l2_ca_pcps_acquisition.h
* \brief Adapts a PCPS acquisition block to an AcquisitionInterface for
* Glonass L2 C/A signals
* \author Damian Miralles, 2018, dmiralles2009@gmail.com
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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_GLONASS_L2_CA_PCPS_ACQUISITION_H_
#define GNSS_SDR_GLONASS_L2_CA_PCPS_ACQUISITION_H_
#include "acquisition_interface.h"
#include "gnss_synchro.h"
#include "pcps_acquisition.h"
#include "complex_byte_to_float_x2.h"
#include <gnuradio/blocks/stream_to_vector.h>
#include <gnuradio/blocks/float_to_complex.h>
#include <string>
class ConfigurationInterface;
/*!
* \brief This class adapts a PCPS acquisition block to an AcquisitionInterface
* for GLONASS L2 C/A signals
*/
class GlonassL2CaPcpsAcquisition : public AcquisitionInterface
{
public:
GlonassL2CaPcpsAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams,
unsigned int out_streams);
virtual ~GlonassL2CaPcpsAcquisition();
inline std::string role() override
{
return role_;
}
/*!
* \brief Returns "GLONASS_L2_CA_PCPS_Acquisition"
*/
inline std::string implementation() override
{
return "GLONASS_L2_CA_PCPS_Acquisition";
}
inline size_t item_size() override
{
return item_size_;
}
void connect(gr::top_block_sptr top_block) override;
void disconnect(gr::top_block_sptr top_block) override;
gr::basic_block_sptr get_left_block() override;
gr::basic_block_sptr get_right_block() override;
/*!
* \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) override;
/*!
* \brief Set acquisition channel unique ID
*/
void set_channel(unsigned int channel) override;
/*!
* \brief Set statistics threshold of PCPS algorithm
*/
void set_threshold(float threshold) override;
/*!
* \brief Set maximum Doppler off grid search
*/
void set_doppler_max(unsigned int doppler_max) override;
/*!
* \brief Set Doppler steps for the grid search
*/
void set_doppler_step(unsigned int doppler_step) override;
/*!
* \brief Initializes acquisition algorithm.
*/
void init() override;
/*!
* \brief Sets local code for GLONASS L2/CA PCPS acquisition algorithm.
*/
void set_local_code() override;
/*!
* \brief Returns the maximum peak of grid search
*/
signed int mag() override;
/*!
* \brief Restart acquisition algorithm
*/
void reset() override;
/*!
* \brief If state = 1, it forces the block to start acquiring from the first sample
*/
void set_state(int state);
private:
ConfigurationInterface* configuration_;
pcps_acquisition_sptr acquisition_;
gr::blocks::stream_to_vector::sptr stream_to_vector_;
gr::blocks::float_to_complex::sptr float_to_complex_;
complex_byte_to_float_x2_sptr cbyte_to_float_x2_;
size_t item_size_;
std::string item_type_;
unsigned int vector_length_;
unsigned int code_length_;
bool bit_transition_flag_;
bool use_CFAR_algorithm_flag_;
unsigned int channel_;
float threshold_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int sampled_ms_;
unsigned int max_dwells_;
long fs_in_;
long if_;
bool dump_;
bool blocking_;
std::string dump_filename_;
std::complex<float>* code_;
Gnss_Synchro* gnss_synchro_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
float calculate_threshold(float pfa);
};
#endif /* GNSS_SDR_GLONASS_L2_CA_PCPS_ACQUISITION_H_ */

8
src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition.cc
View File

@ -35,12 +35,12 @@
#include "pcps_acquisition.h"
#include "GPS_L1_CA.h" // for GPS_TWO_PI
#include "GLONASS_L1_CA.h" // for GLONASS_TWO_PI
#include <glog/logging.h>
#include <gnuradio/io_signature.h>
#include <matio.h>
#include <volk/volk.h>
#include <cstring>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h" // for GLONASS_TWO_PI
using google::LogMessage;
@ -210,6 +210,12 @@ bool pcps_acquisition::is_fdma()
LOG(INFO) << "Trying to acquire SV PRN " << d_gnss_synchro->PRN << " with freq " << d_freq << " in Glonass Channel " << GLONASS_PRN.at(d_gnss_synchro->PRN) << std::endl;
return true;
}
else if (strcmp(d_gnss_synchro->Signal, "2G") == 0)
{
d_freq += DFRQ2_GLO * GLONASS_PRN.at(d_gnss_synchro->PRN);
LOG(INFO) << "Trying to acquire SV PRN " << d_gnss_synchro->PRN << " with freq " << d_freq << " in Glonass Channel " << GLONASS_PRN.at(d_gnss_synchro->PRN) << std::endl;
return true;
}
else
{
return false;

1
src/algorithms/libs/CMakeLists.txt
View File

@ -27,6 +27,7 @@ set(GNSS_SPLIBS_SOURCES
gnss_signal_processing.cc
gps_sdr_signal_processing.cc
glonass_l1_signal_processing.cc
glonass_l2_signal_processing.cc
pass_through.cc
galileo_e5_signal_processing.cc
complex_byte_to_float_x2.cc

152
src/algorithms/libs/glonass_l2_signal_processing.cc Normal file
View File

@ -0,0 +1,152 @@
/*!
* \file glonass_l2_signal_processing.cc
* \brief This class implements various functions for GLONASS L2 CA signals
* \author Damian Miralles, 2018, dmiralles2009(at)gmail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2015 (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 "glonass_l2_signal_processing.h"
auto auxCeil = [](float x) { return static_cast<int>(static_cast<long>((x) + 1)); };
void glonass_l2_ca_code_gen_complex(std::complex<float>* _dest, /* signed int _prn,*/ unsigned int _chip_shift)
{
const unsigned int _code_length = 511;
bool G1[_code_length];
bool G1_register[9];
bool feedback1;
bool aux;
unsigned int delay;
unsigned int lcv, lcv2;
for (lcv = 0; lcv < 9; lcv++)
{
G1_register[lcv] = 1;
}
/* Generate G1 Register */
for (lcv = 0; lcv < _code_length; lcv++)
{
G1[lcv] = G1_register[2];
feedback1 = G1_register[4] ^ G1_register[0];
for (lcv2 = 0; lcv2 < 8; lcv2++)
{
G1_register[lcv2] = G1_register[lcv2 + 1];
}
G1_register[8] = feedback1;
}
/* Generate PRN from G1 Register */
for (lcv = 0; lcv < _code_length; lcv++)
{
aux = G1[lcv];
if (aux == true)
{
_dest[lcv] = std::complex<float>(1, 0);
}
else
{
_dest[lcv] = std::complex<float>(-1, 0);
}
}
/* Set the delay */
delay = _code_length;
delay += _chip_shift;
delay %= _code_length;
/* Generate PRN from G1 and G2 Registers */
for (lcv = 0; lcv < _code_length; lcv++)
{
aux = G1[(lcv + _chip_shift) % _code_length];
if (aux == true)
{
_dest[lcv] = std::complex<float>(1, 0);
}
else
{
_dest[lcv] = std::complex<float>(-1, 0);
}
delay++;
delay %= _code_length;
}
}
/*
* Generates complex GLONASS L2 C/A code for the desired SV ID and sampled to specific sampling frequency
*/
void glonass_l2_ca_code_gen_complex_sampled(std::complex<float>* _dest, /* unsigned int _prn,*/ signed int _fs, unsigned int _chip_shift)
{
// This function is based on the GNU software GPS for MATLAB in the Kay Borre book
std::complex<float> _code[511];
signed int _samplesPerCode, _codeValueIndex;
float _ts;
float _tc;
float aux;
const signed int _codeFreqBasis = 511000; //Hz
const signed int _codeLength = 511;
//--- Find number of samples per spreading code ----------------------------
_samplesPerCode = static_cast<signed int>(static_cast<double>(_fs) / static_cast<double>(_codeFreqBasis / _codeLength));
//--- Find time constants --------------------------------------------------
_ts = 1.0 / static_cast<float>(_fs); // Sampling period in sec
_tc = 1.0 / static_cast<float>(_codeFreqBasis); // C/A chip period in sec
glonass_l2_ca_code_gen_complex(_code, _chip_shift); //generate C/A code 1 sample per chip
for (signed int i = 0; i < _samplesPerCode; i++)
{
//=== Digitizing =======================================================
//--- Make index array to read C/A code values -------------------------
// The length of the index array depends on the sampling frequency -
// number of samples per millisecond (because one C/A code period is one
// millisecond).
// _codeValueIndex = ceil((_ts * ((float)i + 1)) / _tc) - 1;
aux = (_ts * (i + 1)) / _tc;
_codeValueIndex = auxCeil(aux) - 1;
//--- Make the digitized version of the C/A code -----------------------
// The "upsampled" code is made by selecting values form the CA code
// chip array (caCode) for the time instances of each sample.
if (i == _samplesPerCode - 1)
{
//--- Correct the last index (due to number rounding issues) -----------
_dest[i] = _code[_codeLength - 1];
}
else
{
_dest[i] = _code[_codeValueIndex]; //repeat the chip -> upsample
}
}
}

47
src/algorithms/libs/glonass_l2_signal_processing.h Normal file
View File

@ -0,0 +1,47 @@
/*!
* \file glonass_l2_signal_processing.h
* \brief This class implements various functions for GLONASS L2 CA signals
* \author Damian Miralles, 2018, dmiralles2009(at)gmail.com
*
* Detailed description of the file here if needed.
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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_GLONASS_L2_SIGNAL_PROCESSING_H_
#define GNSS_SDR_GLONASS_L2_SIGNAL_PROCESSING_H_
#include <complex>
//!Generates complex GLONASS L2 C/A code for the desired SV ID and code shift, and sampled to specific sampling frequency
void glonass_l2_ca_code_gen_complex(std::complex<float>* _dest, /*signed int _prn,*/ unsigned int _chip_shift);
//! Generates N complex GLONASS L2 C/A codes for the desired SV ID and code shift
void glonass_l2_ca_code_gen_complex_sampled(std::complex<float>* _dest, /* unsigned int _prn,*/ signed int _fs, unsigned int _chip_shift, unsigned int _ncodes);
//! Generates complex GLONASS L2 C/A code for the desired SV ID and code shift
void glonass_l2_ca_code_gen_complex_sampled(std::complex<float>* _dest, /* unsigned int _prn,*/ signed int _fs, unsigned int _chip_shift);
#endif /* GNSS_SDR_GLONASS_L2_SIGNAL_PROCESSING_H_ */

12
src/algorithms/signal_generator/adapters/signal_generator.cc
View File

@ -35,8 +35,9 @@
#include "Galileo_E1.h"
#include "GPS_L1_CA.h"
#include "Galileo_E5a.h"
#include "GLONASS_L1_CA.h"
#include "GLONASS_L1_L2_CA.h"
#include <glog/logging.h>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
using google::LogMessage;
@ -100,7 +101,14 @@ SignalGenerator::SignalGenerator(ConfigurationInterface* configuration,
}
else if (std::find(system.begin(), system.end(), "R") != system.end())
{
vector_length = round((float)fs_in / (GLONASS_L1_CA_CODE_RATE_HZ / GLONASS_L1_CA_CODE_LENGTH_CHIPS));
if (signal1[0].at(0) == '1')
{
vector_length = round((float)fs_in / (GLONASS_L1_CA_CODE_RATE_HZ / GLONASS_L1_CA_CODE_LENGTH_CHIPS));
}
else
{
vector_length = round((float)fs_in / (GLONASS_L2_CA_CODE_RATE_HZ / GLONASS_L2_CA_CODE_LENGTH_CHIPS));
}
}
if (item_type_.compare("gr_complex") == 0)

2
src/algorithms/signal_generator/gnuradio_blocks/signal_generator_c.cc
View File

@ -36,10 +36,10 @@
#include "Galileo_E1.h"
#include "Galileo_E5a.h"
#include "GPS_L1_CA.h"
#include "GLONASS_L1_CA.h"
#include <gnuradio/io_signature.h>
#include <volk_gnsssdr/volk_gnsssdr.h>
#include <fstream>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
/*
* Create a new instance of signal_generator_c and return

3
src/algorithms/telemetry_decoder/adapters/CMakeLists.txt
View File

@ -24,7 +24,8 @@ set(TELEMETRY_DECODER_ADAPTER_SOURCES
galileo_e1b_telemetry_decoder.cc
sbas_l1_telemetry_decoder.cc
galileo_e5a_telemetry_decoder.cc
glonass_l1_ca_telemetry_decoder.cc
glonass_l1_ca_telemetry_decoder.cc
glonass_l2_ca_telemetry_decoder.cc
)
include_directories(

103
src/algorithms/telemetry_decoder/adapters/glonass_l2_ca_telemetry_decoder.cc Normal file
View File

@ -0,0 +1,103 @@
/*!
* \file glonass_l2_ca_telemetry_decoder.cc
* \brief Implementation of an adapter of a GLONASS L2 C/A NAV data decoder block
* to a TelemetryDecoderInterface
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2015 (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 "glonass_l2_ca_telemetry_decoder.h"
#include "configuration_interface.h"
#include "glonass_gnav_ephemeris.h"
#include "glonass_gnav_almanac.h"
#include "glonass_gnav_utc_model.h"
#include <gnuradio/io_signature.h>
#include <glog/logging.h>
using google::LogMessage;
GlonassL2CaTelemetryDecoder::GlonassL2CaTelemetryDecoder(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams) : role_(role),
in_streams_(in_streams),
out_streams_(out_streams)
{
std::string default_dump_filename = "./navigation.dat";
DLOG(INFO) << "role " << role;
dump_ = configuration->property(role + ".dump", false);
dump_filename_ = configuration->property(role + ".dump_filename", default_dump_filename);
// make telemetry decoder object
telemetry_decoder_ = glonass_l2_ca_make_telemetry_decoder_cc(satellite_, dump_);
DLOG(INFO) << "telemetry_decoder(" << telemetry_decoder_->unique_id() << ")";
channel_ = 0;
}
GlonassL2CaTelemetryDecoder::~GlonassL2CaTelemetryDecoder()
{
}
void GlonassL2CaTelemetryDecoder::set_satellite(const Gnss_Satellite& satellite)
{
satellite_ = Gnss_Satellite(satellite.get_system(), satellite.get_PRN());
telemetry_decoder_->set_satellite(satellite_);
DLOG(INFO) << "TELEMETRY DECODER: satellite set to " << satellite_;
}
void GlonassL2CaTelemetryDecoder::connect(gr::top_block_sptr top_block)
{
if (top_block)
{ /* top_block is not null */
};
// Nothing to connect internally
DLOG(INFO) << "nothing to connect internally";
}
void GlonassL2CaTelemetryDecoder::disconnect(gr::top_block_sptr top_block)
{
if (top_block)
{ /* top_block is not null */
};
// Nothing to disconnect
}
gr::basic_block_sptr GlonassL2CaTelemetryDecoder::get_left_block()
{
return telemetry_decoder_;
}
gr::basic_block_sptr GlonassL2CaTelemetryDecoder::get_right_block()
{
return telemetry_decoder_;
}

90
src/algorithms/telemetry_decoder/adapters/glonass_l2_ca_telemetry_decoder.h Normal file
View File

@ -0,0 +1,90 @@
/*!
* \file glonass_l2_ca_telemetry_decoder.h
* \brief Interface of an adapter of a GLONASS L2 C/A NAV data decoder block
* to a TelemetryDecoderInterface
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2015 (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_GLONASS_L2_CA_TELEMETRY_DECODER_H_
#define GNSS_SDR_GLONASS_L2_CA_TELEMETRY_DECODER_H_
#include "telemetry_decoder_interface.h"
#include "glonass_l2_ca_telemetry_decoder_cc.h"
#include <string>
class ConfigurationInterface;
/*!
* \brief This class implements a NAV data decoder for GLONASS L2 C/A
*/
class GlonassL2CaTelemetryDecoder : public TelemetryDecoderInterface
{
public:
GlonassL2CaTelemetryDecoder(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams);
virtual ~GlonassL2CaTelemetryDecoder();
std::string role() override
{
return role_;
}
//! Returns "GLONASS_L2_CA_Telemetry_Decoder"
std::string implementation() override
{
return "GLONASS_L2_CA_Telemetry_Decoder";
}
void connect(gr::top_block_sptr top_block) override;
void disconnect(gr::top_block_sptr top_block) override;
gr::basic_block_sptr get_left_block() override;
gr::basic_block_sptr get_right_block() override;
void set_satellite(const Gnss_Satellite& satellite) override;
void set_channel(int channel) override { telemetry_decoder_->set_channel(channel); }
void reset() override
{
return;
}
size_t item_size() override
{
return 0;
}
private:
glonass_l2_ca_telemetry_decoder_cc_sptr telemetry_decoder_;
Gnss_Satellite satellite_;
int channel_;
bool dump_;
std::string dump_filename_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
};
#endif

1
src/algorithms/telemetry_decoder/gnuradio_blocks/CMakeLists.txt
View File

@ -24,6 +24,7 @@ set(TELEMETRY_DECODER_GR_BLOCKS_SOURCES
sbas_l1_telemetry_decoder_cc.cc
galileo_e5a_telemetry_decoder_cc.cc
glonass_l1_ca_telemetry_decoder_cc.cc
glonass_l2_ca_telemetry_decoder_cc.cc
)
include_directories(

2
src/algorithms/telemetry_decoder/gnuradio_blocks/glonass_l1_ca_telemetry_decoder_cc.h
View File

@ -34,7 +34,6 @@
#define GNSS_SDR_GLONASS_L1_CA_TELEMETRY_DECODER_CC_H
#include "GLONASS_L1_CA.h"
#include "glonass_gnav_navigation_message.h"
#include "glonass_gnav_ephemeris.h"
#include "glonass_gnav_almanac.h"
@ -44,6 +43,7 @@
#include <gnuradio/block.h>
#include <fstream>
#include <string>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
class glonass_l1_ca_telemetry_decoder_cc;

449
src/algorithms/telemetry_decoder/gnuradio_blocks/glonass_l2_ca_telemetry_decoder_cc.cc Normal file
View File

@ -0,0 +1,449 @@
/*!
* \file glonass_l2_ca_telemetry_decoder_cc.cc
* \brief Implementation of an adapter of a GLONASS L1 C/A NAV data decoder block
* to a TelemetryDecoderInterface
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2015 (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 "glonass_l2_ca_telemetry_decoder_cc.h"
#include <boost/lexical_cast.hpp>
#include <gnuradio/io_signature.h>
#include <glog/logging.h>
#define CRC_ERROR_LIMIT 6
using google::LogMessage;
glonass_l2_ca_telemetry_decoder_cc_sptr
glonass_l2_ca_make_telemetry_decoder_cc(const Gnss_Satellite &satellite, bool dump)
{
return glonass_l2_ca_telemetry_decoder_cc_sptr(new glonass_l2_ca_telemetry_decoder_cc(satellite, dump));
}
glonass_l2_ca_telemetry_decoder_cc::glonass_l2_ca_telemetry_decoder_cc(
const Gnss_Satellite &satellite,
bool dump) : gr::block("glonass_l2_ca_telemetry_decoder_cc", gr::io_signature::make(1, 1, sizeof(Gnss_Synchro)),
gr::io_signature::make(1, 1, sizeof(Gnss_Synchro)))
{
// Telemetry Bit transition synchronization port out
this->message_port_register_out(pmt::mp("preamble_timestamp_s"));
// Ephemeris data port out
this->message_port_register_out(pmt::mp("telemetry"));
// initialize internal vars
d_dump = dump;
d_satellite = Gnss_Satellite(satellite.get_system(), satellite.get_PRN());
LOG(INFO) << "Initializing GLONASS L2 CA TELEMETRY DECODING";
// Define the number of sampes per symbol. Notice that GLONASS has 2 rates,
//one for the navigation data and the other for the preamble information
d_samples_per_symbol = (GLONASS_L2_CA_CODE_RATE_HZ / GLONASS_L2_CA_CODE_LENGTH_CHIPS) / GLONASS_L2_CA_SYMBOL_RATE_BPS;
// Set the preamble information
unsigned short int preambles_bits[GLONASS_GNAV_PREAMBLE_LENGTH_BITS] = GLONASS_GNAV_PREAMBLE;
// Since preamble rate is different than navigation data rate we use a constant
d_symbols_per_preamble = GLONASS_GNAV_PREAMBLE_LENGTH_SYMBOLS;
memcpy(static_cast<unsigned short int *>(this->d_preambles_bits), static_cast<unsigned short int *>(preambles_bits), GLONASS_GNAV_PREAMBLE_LENGTH_BITS * sizeof(unsigned short int));
// preamble bits to sampled symbols
d_preambles_symbols = static_cast<signed int *>(malloc(sizeof(signed int) * d_symbols_per_preamble));
int n = 0;
for (int i = 0; i < GLONASS_GNAV_PREAMBLE_LENGTH_BITS; i++)
{
for (unsigned int j = 0; j < GLONASS_GNAV_TELEMETRY_SYMBOLS_PER_PREAMBLE_BIT; j++)
{
if (d_preambles_bits[i] == 1)
{
d_preambles_symbols[n] = 1;
}
else
{
d_preambles_symbols[n] = -1;
}
n++;
}
}
d_sample_counter = 0;
d_stat = 0;
d_preamble_index = 0;
d_flag_frame_sync = false;
d_flag_parity = false;
d_TOW_at_current_symbol = 0;
Flag_valid_word = false;
delta_t = 0;
d_CRC_error_counter = 0;
d_flag_preamble = false;
d_channel = 0;
flag_TOW_set = false;
d_preamble_time_samples = 0;
}
glonass_l2_ca_telemetry_decoder_cc::~glonass_l2_ca_telemetry_decoder_cc()
{
delete d_preambles_symbols;
if (d_dump_file.is_open() == true)
{
try
{
d_dump_file.close();
}
catch (const std::exception &ex)
{
LOG(WARNING) << "Exception in destructor closing the dump file " << ex.what();
}
}
}
void glonass_l2_ca_telemetry_decoder_cc::decode_string(double *frame_symbols, int frame_length)
{
double chip_acc = 0.0;
int chip_acc_counter = 0;
// 1. Transform from symbols to bits
std::string bi_binary_code;
std::string relative_code;
std::string data_bits;
// Group samples into bi-binary code
for (int i = 0; i < (frame_length); i++)
{
chip_acc += frame_symbols[i];
chip_acc_counter += 1;
if (chip_acc_counter == (GLONASS_GNAV_TELEMETRY_SYMBOLS_PER_BIT))
{
if (chip_acc > 0)
{
bi_binary_code.push_back('1');
chip_acc_counter = 0;
chip_acc = 0;
}
else
{
bi_binary_code.push_back('0');
chip_acc_counter = 0;
chip_acc = 0;
}
}
}
// Convert from bi-binary code to relative code
for (int i = 0; i < (GLONASS_GNAV_STRING_BITS); i++)
{
if (bi_binary_code[2 * i] == '1' && bi_binary_code[2 * i + 1] == '0')
{
relative_code.push_back('1');
}
else
{
relative_code.push_back('0');
}
}
// Convert from relative code to data bits
data_bits.push_back('0');
for (int i = 1; i < (GLONASS_GNAV_STRING_BITS); i++)
{
data_bits.push_back(((relative_code[i - 1] - '0') ^ (relative_code[i] - '0')) + '0');
}
// 2. Call the GLONASS GNAV string decoder
d_nav.string_decoder(data_bits);
// 3. Check operation executed correctly
if (d_nav.flag_CRC_test == true)
{
LOG(INFO) << "GLONASS GNAV CRC correct on channel " << d_channel << " from satellite " << d_satellite;
}
else
{
LOG(INFO) << "GLONASS GNAV CRC error on channel " << d_channel << " from satellite " << d_satellite;
}
// 4. Push the new navigation data to the queues
if (d_nav.have_new_ephemeris() == true)
{
// get object for this SV (mandatory)
d_nav.gnav_ephemeris.i_satellite_freq_channel = d_satellite.get_rf_link();
std::shared_ptr<Glonass_Gnav_Ephemeris> tmp_obj = std::make_shared<Glonass_Gnav_Ephemeris>(d_nav.get_ephemeris());
this->message_port_pub(pmt::mp("telemetry"), pmt::make_any(tmp_obj));
LOG(INFO) << "GLONASS GNAV Ephemeris have been received on channel" << d_channel << " from satellite " << d_satellite;
}
if (d_nav.have_new_utc_model() == true)
{
// get object for this SV (mandatory)
std::shared_ptr<Glonass_Gnav_Utc_Model> tmp_obj = std::make_shared<Glonass_Gnav_Utc_Model>(d_nav.get_utc_model());
this->message_port_pub(pmt::mp("telemetry"), pmt::make_any(tmp_obj));
LOG(INFO) << "GLONASS GNAV UTC Model have been received on channel" << d_channel << " from satellite " << d_satellite;
}
if (d_nav.have_new_almanac() == true)
{
unsigned int slot_nbr = d_nav.i_alm_satellite_slot_number;
std::shared_ptr<Glonass_Gnav_Almanac> tmp_obj = std::make_shared<Glonass_Gnav_Almanac>(d_nav.get_almanac(slot_nbr));
this->message_port_pub(pmt::mp("telemetry"), pmt::make_any(tmp_obj));
LOG(INFO) << "GLONASS GNAV Almanac have been received on channel" << d_channel << " in slot number " << slot_nbr;
}
// 5. Update satellite information on system
if (d_nav.flag_update_slot_number == true)
{
LOG(INFO) << "GLONASS GNAV Slot Number Identified on channel " << d_channel;
d_satellite.update_PRN(d_nav.gnav_ephemeris.d_n);
d_satellite.what_block(d_satellite.get_system(), d_nav.gnav_ephemeris.d_n);
d_nav.flag_update_slot_number = false;
}
}
int glonass_l2_ca_telemetry_decoder_cc::general_work(int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
{
int corr_value = 0;
int preamble_diff = 0;
Gnss_Synchro **out = reinterpret_cast<Gnss_Synchro **>(&output_items[0]); // Get the output buffer pointer
const Gnss_Synchro **in = reinterpret_cast<const Gnss_Synchro **>(&input_items[0]); // Get the input buffer pointer
Gnss_Synchro current_symbol; //structure to save the synchronization information and send the output object to the next block
//1. Copy the current tracking output
current_symbol = in[0][0];
d_symbol_history.push_back(current_symbol); //add new symbol to the symbol queue
d_sample_counter++; //count for the processed samples
consume_each(1);
d_flag_preamble = false;
unsigned int required_symbols = GLONASS_GNAV_STRING_SYMBOLS;
if (d_symbol_history.size() > required_symbols)
{
//******* preamble correlation ********
for (int i = 0; i < d_symbols_per_preamble; i++)
{
if (d_symbol_history.at(i).Prompt_I < 0) // symbols clipping
{
corr_value -= d_preambles_symbols[i];
}
else
{
corr_value += d_preambles_symbols[i];
}
}
}
//******* frame sync ******************
if (d_stat == 0) //no preamble information
{
if (abs(corr_value) >= d_symbols_per_preamble)
{
// Record the preamble sample stamp
d_preamble_index = d_sample_counter;
LOG(INFO) << "Preamble detection for GLONASS L2 C/A SAT " << this->d_satellite;
// Enter into frame pre-detection status
d_stat = 1;
d_preamble_time_samples = d_symbol_history.at(0).Tracking_sample_counter; // record the preamble sample stamp
}
}
else if (d_stat == 1) // posible preamble lock
{
if (abs(corr_value) >= d_symbols_per_preamble)
{
//check preamble separation
preamble_diff = d_sample_counter - d_preamble_index;
// Record the PRN start sample index associated to the preamble
d_preamble_time_samples = d_symbol_history.at(0).Tracking_sample_counter;
if (abs(preamble_diff - GLONASS_GNAV_PREAMBLE_PERIOD_SYMBOLS) == 0)
{
//try to decode frame
LOG(INFO) << "Starting string decoder for GLONASS L2 C/A SAT " << this->d_satellite;
d_preamble_index = d_sample_counter; //record the preamble sample stamp
d_stat = 2;
// send asynchronous message to tracking to inform of frame sync and extend correlation time
pmt::pmt_t value = pmt::from_double(static_cast<double>(d_preamble_time_samples) / static_cast<double>(d_symbol_history.at(0).fs) - 0.001);
this->message_port_pub(pmt::mp("preamble_timestamp_s"), value);
}
else
{
if (preamble_diff > GLONASS_GNAV_PREAMBLE_PERIOD_SYMBOLS)
{
d_stat = 0; // start again
}
DLOG(INFO) << "Failed string decoder for GLONASS L2 C/A SAT " << this->d_satellite;
}
}
}
else if (d_stat == 2)
{
// FIXME: The preamble index marks the first symbol of the string count. Here I just wait for another full string to be received before processing
if (d_sample_counter == d_preamble_index + GLONASS_GNAV_STRING_SYMBOLS)
{
// NEW GLONASS string received
// 0. fetch the symbols into an array
int string_length = GLONASS_GNAV_STRING_SYMBOLS - d_symbols_per_preamble;
double string_symbols[GLONASS_GNAV_DATA_SYMBOLS] = {0};
//******* SYMBOL TO BIT *******
for (int i = 0; i < string_length; i++)
{
if (corr_value > 0)
{
string_symbols[i] = d_symbol_history.at(i + d_symbols_per_preamble).Prompt_I; // because last symbol of the preamble is just received now!
}
else
{
string_symbols[i] = -d_symbol_history.at(i + d_symbols_per_preamble).Prompt_I; // because last symbol of the preamble is just received now!
}
}
//call the decoder
decode_string(string_symbols, string_length);
if (d_nav.flag_CRC_test == true)
{
d_CRC_error_counter = 0;
d_flag_preamble = true; //valid preamble indicator (initialized to false every work())
d_preamble_index = d_sample_counter; //record the preamble sample stamp (t_P)
if (!d_flag_frame_sync)
{
d_flag_frame_sync = true;
DLOG(INFO) << " Frame sync SAT " << this->d_satellite << " with preamble start at "
<< d_symbol_history.at(0).Tracking_sample_counter << " [samples]";
}
}
else
{
d_CRC_error_counter++;
d_preamble_index = d_sample_counter; //record the preamble sample stamp
if (d_CRC_error_counter > CRC_ERROR_LIMIT)
{
LOG(INFO) << "Lost of frame sync SAT " << this->d_satellite;
d_flag_frame_sync = false;
d_stat = 0;
}
}
}
}
// UPDATE GNSS SYNCHRO DATA
//2. Add the telemetry decoder information
if (this->d_flag_preamble == true and d_nav.flag_TOW_new == true)
//update TOW at the preamble instant
{
d_TOW_at_current_symbol = floor((d_nav.gnav_ephemeris.d_TOW - GLONASS_GNAV_PREAMBLE_DURATION_S) * 1000) / 1000;
d_nav.flag_TOW_new = false;
}
else //if there is not a new preamble, we define the TOW of the current symbol
{
d_TOW_at_current_symbol = d_TOW_at_current_symbol + GLONASS_L2_CA_CODE_PERIOD;
}
//if (d_flag_frame_sync == true and d_nav.flag_TOW_set==true and d_nav.flag_CRC_test == true)
// if(d_nav.flag_GGTO_1 == true and d_nav.flag_GGTO_2 == true and d_nav.flag_GGTO_3 == true and d_nav.flag_GGTO_4 == true) //all GGTO parameters arrived
// {
// delta_t = d_nav.A_0G_10 + d_nav.A_1G_10 * (d_TOW_at_current_symbol - d_nav.t_0G_10 + 604800.0 * (fmod((d_nav.WN_0 - d_nav.WN_0G_10), 64)));
// }
if (d_flag_frame_sync == true and d_nav.flag_TOW_set == true)
{
current_symbol.Flag_valid_word = true;
}
else
{
current_symbol.Flag_valid_word = false;
}
current_symbol.PRN = this->d_satellite.get_PRN();
current_symbol.TOW_at_current_symbol_s = d_TOW_at_current_symbol;
current_symbol.TOW_at_current_symbol_s -= delta_t; // Galileo to GPS TOW
if (d_dump == true)
{
// MULTIPLEXED FILE RECORDING - Record results to file
try
{
double tmp_double;
unsigned long int tmp_ulong_int;
tmp_double = d_TOW_at_current_symbol;
d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double));
tmp_ulong_int = current_symbol.Tracking_sample_counter;
d_dump_file.write(reinterpret_cast<char *>(&tmp_ulong_int), sizeof(unsigned long int));
tmp_double = 0;
d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double));
}
catch (const std::ifstream::failure &e)
{
LOG(WARNING) << "Exception writing observables dump file " << e.what();
}
}
// remove used symbols from history
if (d_symbol_history.size() > required_symbols)
{
d_symbol_history.pop_front();
}
//3. Make the output (copy the object contents to the GNURadio reserved memory)
*out[0] = current_symbol;
return 1;
}
void glonass_l2_ca_telemetry_decoder_cc::set_satellite(const Gnss_Satellite &satellite)
{
d_satellite = Gnss_Satellite(satellite.get_system(), satellite.get_PRN());
DLOG(INFO) << "Setting decoder Finite State Machine to satellite " << d_satellite;
DLOG(INFO) << "Navigation Satellite set to " << d_satellite;
}
void glonass_l2_ca_telemetry_decoder_cc::set_channel(int channel)
{
d_channel = channel;
LOG(INFO) << "Navigation channel set to " << channel;
// ############# ENABLE DATA FILE LOG #################
if (d_dump == true)
{
if (d_dump_file.is_open() == false)
{
try
{
d_dump_filename = "telemetry";
d_dump_filename.append(boost::lexical_cast<std::string>(d_channel));
d_dump_filename.append(".dat");
d_dump_file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
d_dump_file.open(d_dump_filename.c_str(), std::ios::out | std::ios::binary);
LOG(INFO) << "Telemetry decoder dump enabled on channel " << d_channel << " Log file: " << d_dump_filename.c_str();
}
catch (const std::ifstream::failure &e)
{
LOG(WARNING) << "channel " << d_channel << ": exception opening Glonass TLM dump file. " << e.what();
}
}
}
}

117
src/algorithms/telemetry_decoder/gnuradio_blocks/glonass_l2_ca_telemetry_decoder_cc.h Normal file
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@ -0,0 +1,117 @@
/*!
* \file glonass_l2_ca_telemetry_decoder_cc.h
* \brief Implementation of an adapter of a GLONASS L2 C/A NAV data decoder block
* to a TelemetryDecoderInterface
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2015 (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_GLONASS_L2_CA_TELEMETRY_DECODER_CC_H
#define GNSS_SDR_GLONASS_L2_CA_TELEMETRY_DECODER_CC_H
#include "GLONASS_L1_L2_CA.h"
#include "glonass_gnav_navigation_message.h"
#include "glonass_gnav_ephemeris.h"
#include "glonass_gnav_almanac.h"
#include "glonass_gnav_utc_model.h"
#include "gnss_satellite.h"
#include "gnss_synchro.h"
#include <gnuradio/block.h>
#include <fstream>
#include <string>
class glonass_l2_ca_telemetry_decoder_cc;
typedef boost::shared_ptr<glonass_l2_ca_telemetry_decoder_cc> glonass_l2_ca_telemetry_decoder_cc_sptr;
glonass_l2_ca_telemetry_decoder_cc_sptr glonass_l2_ca_make_telemetry_decoder_cc(const Gnss_Satellite &satellite, bool dump);
/*!
* \brief This class implements a block that decodes the GNAV data defined in GLONASS ICD v5.1
* \see <a href="http://russianspacesystems.ru/wp-content/uploads/2016/08/ICD_GLONASS_eng_v5.1.pdf">GLONASS ICD</a>
*
*/
class glonass_l2_ca_telemetry_decoder_cc : public gr::block
{
public:
~glonass_l2_ca_telemetry_decoder_cc(); //!< Class destructor
void set_satellite(const Gnss_Satellite &satellite); //!< Set satellite PRN
void set_channel(int channel); //!< Set receiver's channel
/*!
* \brief This is where all signal processing takes place
*/
int general_work(int noutput_items, gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items);
private:
friend glonass_l2_ca_telemetry_decoder_cc_sptr
glonass_l2_ca_make_telemetry_decoder_cc(const Gnss_Satellite &satellite, bool dump);
glonass_l2_ca_telemetry_decoder_cc(const Gnss_Satellite &satellite, bool dump);
void decode_string(double *symbols, int frame_length);
//!< Help with coherent tracking
double d_preamble_time_samples;
//!< Preamble decoding
unsigned short int d_preambles_bits[GLONASS_GNAV_PREAMBLE_LENGTH_BITS];
int *d_preambles_symbols;
unsigned int d_samples_per_symbol;
int d_symbols_per_preamble;
//!< Storage for incoming data
std::deque<Gnss_Synchro> d_symbol_history;
//!< Variables for internal functionality
long unsigned int d_sample_counter; //!< Sample counter as an index (1,2,3,..etc) indicating number of samples processed
long unsigned int d_preamble_index; //!< Index of sample number where preamble was found
unsigned int d_stat; //!< Status of decoder
bool d_flag_frame_sync; //!< Indicate when a frame sync is achieved
bool d_flag_parity; //!< Flag indicating when parity check was achieved (crc check)
bool d_flag_preamble; //!< Flag indicating when preamble was found
int d_CRC_error_counter; //!< Number of failed CRC operations
bool flag_TOW_set; //!< Indicates when time of week is set
double delta_t; //!< GPS-GLONASS time offset
//!< Navigation Message variable
Glonass_Gnav_Navigation_Message d_nav;
//!< Values to populate gnss synchronization structure
double d_TOW_at_current_symbol;
bool Flag_valid_word;
//!< Satellite Information and logging capacity
Gnss_Satellite d_satellite;
int d_channel;
bool d_dump;
std::string d_dump_filename;
std::ofstream d_dump_file;
};
#endif

2
src/algorithms/tracking/adapters/CMakeLists.txt
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@ -36,6 +36,8 @@ set(TRACKING_ADAPTER_SOURCES
glonass_l1_ca_dll_pll_tracking.cc
glonass_l1_ca_dll_pll_c_aid_tracking.cc
gps_l5i_dll_pll_tracking.cc
glonass_l2_ca_dll_pll_tracking.cc
glonass_l2_ca_dll_pll_c_aid_tracking.cc
${OPT_TRACKING_ADAPTERS}
)

2
src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_c_aid_tracking.cc
View File

@ -39,9 +39,9 @@
#include "glonass_l1_ca_dll_pll_c_aid_tracking.h"
#include "configuration_interface.h"
#include "GLONASS_L1_CA.h"
#include "gnss_sdr_flags.h"
#include <glog/logging.h>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
using google::LogMessage;

2
src/algorithms/tracking/adapters/glonass_l1_ca_dll_pll_tracking.cc
View File

@ -38,9 +38,9 @@
#include "glonass_l1_ca_dll_pll_tracking.h"
#include "configuration_interface.h"
#include "GLONASS_L1_CA.h"
#include "gnss_sdr_flags.h"
#include <glog/logging.h>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
using google::LogMessage;

241
src/algorithms/tracking/adapters/glonass_l2_ca_dll_pll_c_aid_tracking.cc Normal file
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@ -0,0 +1,241 @@
/*!
* \file glonass_l2_ca_dll_pll_c_aid_tracking.cc
* \brief Interface of an adapter of a DLL+PLL tracking loop block
* for Glonass L2 C/A to a TrackingInterface
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
*
* Code DLL + carrier PLL according to the algorithms described in:
* 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
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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 "glonass_l2_ca_dll_pll_c_aid_tracking.h"
#include "configuration_interface.h"
#include "GLONASS_L1_L2_CA.h"
#include "gnss_sdr_flags.h"
#include <glog/logging.h>
using google::LogMessage;
GlonassL2CaDllPllCAidTracking::GlonassL2CaDllPllCAidTracking(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams) : role_(role), in_streams_(in_streams), out_streams_(out_streams)
{
DLOG(INFO) << "role " << role;
//################# CONFIGURATION PARAMETERS ########################
int fs_in;
int vector_length;
int f_if;
bool dump;
std::string dump_filename;
std::string default_item_type = "gr_complex";
float pll_bw_hz;
float pll_bw_narrow_hz;
float dll_bw_hz;
float dll_bw_narrow_hz;
float early_late_space_chips;
item_type_ = configuration->property(role + ".item_type", default_item_type);
//vector_length = configuration->property(role + ".vector_length", 2048);
int fs_in_deprecated = configuration->property("GNSS-SDR.internal_fs_hz", 2048000);
fs_in = configuration->property("GNSS-SDR.internal_fs_sps", fs_in_deprecated);
f_if = configuration->property(role + ".if", 0);
dump = configuration->property(role + ".dump", false);
pll_bw_hz = configuration->property(role + ".pll_bw_hz", 50.0);
if (FLAGS_pll_bw_hz != 0.0) pll_bw_hz = static_cast<float>(FLAGS_pll_bw_hz);
dll_bw_hz = configuration->property(role + ".dll_bw_hz", 2.0);
if (FLAGS_dll_bw_hz != 0.0) dll_bw_hz = static_cast<float>(FLAGS_dll_bw_hz);
pll_bw_narrow_hz = configuration->property(role + ".pll_bw_narrow_hz", 20.0);
dll_bw_narrow_hz = configuration->property(role + ".dll_bw_narrow_hz", 2.0);
int extend_correlation_ms;
extend_correlation_ms = configuration->property(role + ".extend_correlation_ms", 1);
early_late_space_chips = configuration->property(role + ".early_late_space_chips", 0.5);
std::string default_dump_filename = "./track_ch";
dump_filename = configuration->property(role + ".dump_filename",
default_dump_filename); //unused!
vector_length = std::round(fs_in / (GLONASS_L2_CA_CODE_RATE_HZ / GLONASS_L2_CA_CODE_LENGTH_CHIPS));
//################# MAKE TRACKING GNURadio object ###################
if (item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
tracking_cc = glonass_l2_ca_dll_pll_c_aid_make_tracking_cc(
f_if,
fs_in,
vector_length,
dump,
dump_filename,
pll_bw_hz,
dll_bw_hz,
pll_bw_narrow_hz,
dll_bw_narrow_hz,
extend_correlation_ms,
early_late_space_chips);
DLOG(INFO) << "tracking(" << tracking_cc->unique_id() << ")";
}
else if (item_type_.compare("cshort") == 0)
{
item_size_ = sizeof(lv_16sc_t);
tracking_sc = glonass_l2_ca_dll_pll_c_aid_make_tracking_sc(
f_if,
fs_in,
vector_length,
dump,
dump_filename,
pll_bw_hz,
dll_bw_hz,
pll_bw_narrow_hz,
dll_bw_narrow_hz,
extend_correlation_ms,
early_late_space_chips);
DLOG(INFO) << "tracking(" << tracking_sc->unique_id() << ")";
}
else
{
item_size_ = sizeof(gr_complex);
LOG(WARNING) << item_type_ << " unknown tracking item type.";
}
channel_ = 0;
}
GlonassL2CaDllPllCAidTracking::~GlonassL2CaDllPllCAidTracking()
{
}
void GlonassL2CaDllPllCAidTracking::start_tracking()
{
if (item_type_.compare("gr_complex") == 0)
{
tracking_cc->start_tracking();
}
else if (item_type_.compare("cshort") == 0)
{
tracking_sc->start_tracking();
}
else
{
LOG(WARNING) << item_type_ << " unknown tracking item type";
}
}
/*
* Set tracking channel unique ID
*/
void GlonassL2CaDllPllCAidTracking::set_channel(unsigned int channel)
{
channel_ = channel;
if (item_type_.compare("gr_complex") == 0)
{
tracking_cc->set_channel(channel);
}
else if (item_type_.compare("cshort") == 0)
{
tracking_sc->set_channel(channel);
}
else
{
LOG(WARNING) << item_type_ << " unknown tracking item type";
}
}
void GlonassL2CaDllPllCAidTracking::set_gnss_synchro(Gnss_Synchro* p_gnss_synchro)
{
if (item_type_.compare("gr_complex") == 0)
{
tracking_cc->set_gnss_synchro(p_gnss_synchro);
}
else if (item_type_.compare("cshort") == 0)
{
tracking_sc->set_gnss_synchro(p_gnss_synchro);
}
else
{
LOG(WARNING) << item_type_ << " unknown tracking item type";
}
}
void GlonassL2CaDllPllCAidTracking::connect(gr::top_block_sptr top_block)
{
if (top_block)
{ /* top_block is not null */
};
//nothing to connect, now the tracking uses gr_sync_decimator
}
void GlonassL2CaDllPllCAidTracking::disconnect(gr::top_block_sptr top_block)
{
if (top_block)
{ /* top_block is not null */
};
//nothing to disconnect, now the tracking uses gr_sync_decimator
}
gr::basic_block_sptr GlonassL2CaDllPllCAidTracking::get_left_block()
{
if (item_type_.compare("gr_complex") == 0)
{
return tracking_cc;
}
else if (item_type_.compare("cshort") == 0)
{
return tracking_sc;
}
else
{
LOG(WARNING) << item_type_ << " unknown tracking item type";
return nullptr;
}
}
gr::basic_block_sptr GlonassL2CaDllPllCAidTracking::get_right_block()
{
if (item_type_.compare("gr_complex") == 0)
{
return tracking_cc;
}
else if (item_type_.compare("cshort") == 0)
{
return tracking_sc;
}
else
{
LOG(WARNING) << item_type_ << " unknown tracking item type";
return nullptr;
}
}

106
src/algorithms/tracking/adapters/glonass_l2_ca_dll_pll_c_aid_tracking.h Normal file
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@ -0,0 +1,106 @@
/*!
* \file glonass_l2_ca_dll_pll_c_aid_tracking.h
* \brief Interface of an adapter of a DLL+PLL tracking loop block
* for Glonass L2 C/A to a TrackingInterface
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
*
* Code DLL + carrier PLL according to the algorithms described in:
* 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
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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_GLONASS_L2_CA_DLL_PLL_C_AID_TRACKING_H_
#define GNSS_SDR_GLONASS_L2_CA_DLL_PLL_C_AID_TRACKING_H_
#include "tracking_interface.h"
#include "glonass_l2_ca_dll_pll_c_aid_tracking_cc.h"
#include "glonass_l2_ca_dll_pll_c_aid_tracking_sc.h"
#include <string>
class ConfigurationInterface;
/*!
* \brief This class implements a code DLL + carrier PLL tracking loop
*/
class GlonassL2CaDllPllCAidTracking : public TrackingInterface
{
public:
GlonassL2CaDllPllCAidTracking(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams);
virtual ~GlonassL2CaDllPllCAidTracking();
inline std::string role() override
{
return role_;
}
//! Returns "GLONASS_L2_CA_DLL_PLL_C_Aid_Tracking"
inline std::string implementation() override
{
return "GLONASS_L2_CA_DLL_PLL_C_Aid_Tracking";
}
inline size_t item_size() override
{
return item_size_;
}
void connect(gr::top_block_sptr top_block) override;
void disconnect(gr::top_block_sptr top_block) override;
gr::basic_block_sptr get_left_block() override;
gr::basic_block_sptr get_right_block() override;
/*!
* \brief Set tracking channel unique ID
*/
void set_channel(unsigned int channel) override;
/*!
* \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) override;
void start_tracking() override;
private:
glonass_l2_ca_dll_pll_c_aid_tracking_cc_sptr tracking_cc;
glonass_l2_ca_dll_pll_c_aid_tracking_sc_sptr tracking_sc;
size_t item_size_;
std::string item_type_;
unsigned int channel_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
};
#endif // GNSS_SDR_GLONASS_L2_CA_DLL_PLL_C_AID_TRACKING_H_

154
src/algorithms/tracking/adapters/glonass_l2_ca_dll_pll_tracking.cc Normal file
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@ -0,0 +1,154 @@
/*!
* \file glonass_l2_ca_dll_pll_tracking.cc
* \brief Interface of an adapter of a DLL+PLL tracking loop block
* for Glonass L2 C/A to a TrackingInterface
* \author Damian Miralles, 2018, dmiralles2009(at)gmail.com *
*
* Code DLL + carrier PLL according to the algorithms described in:
* 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
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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 "glonass_l2_ca_dll_pll_tracking.h"
#include "configuration_interface.h"
#include "GLONASS_L1_L2_CA.h"
#include "gnss_sdr_flags.h"
#include <glog/logging.h>
using google::LogMessage;
GlonassL2CaDllPllTracking::GlonassL2CaDllPllTracking(
ConfigurationInterface* configuration, std::string role,
unsigned int in_streams, unsigned int out_streams) : role_(role), in_streams_(in_streams), out_streams_(out_streams)
{
DLOG(INFO) << "role " << role;
//################# CONFIGURATION PARAMETERS ########################
int fs_in;
int vector_length;
int f_if;
bool dump;
std::string dump_filename;
std::string item_type;
std::string default_item_type = "gr_complex";
float pll_bw_hz;
float dll_bw_hz;
float early_late_space_chips;
item_type = configuration->property(role + ".item_type", default_item_type);
int fs_in_deprecated = configuration->property("GNSS-SDR.internal_fs_hz", 2048000);
fs_in = configuration->property("GNSS-SDR.internal_fs_sps", fs_in_deprecated);
f_if = configuration->property(role + ".if", 0);
dump = configuration->property(role + ".dump", false);
pll_bw_hz = configuration->property(role + ".pll_bw_hz", 50.0);
if (FLAGS_pll_bw_hz != 0.0) pll_bw_hz = static_cast<float>(FLAGS_pll_bw_hz);
dll_bw_hz = configuration->property(role + ".dll_bw_hz", 2.0);
if (FLAGS_dll_bw_hz != 0.0) dll_bw_hz = static_cast<float>(FLAGS_dll_bw_hz);
early_late_space_chips = configuration->property(role + ".early_late_space_chips", 0.5);
std::string default_dump_filename = "./track_ch";
dump_filename = configuration->property(role + ".dump_filename", default_dump_filename); //unused!
vector_length = std::round(fs_in / (GLONASS_L2_CA_CODE_RATE_HZ / GLONASS_L2_CA_CODE_LENGTH_CHIPS));
//################# MAKE TRACKING GNURadio object ###################
if (item_type.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
tracking_ = glonass_l2_ca_dll_pll_make_tracking_cc(
f_if,
fs_in,
vector_length,
dump,
dump_filename,
pll_bw_hz,
dll_bw_hz,
early_late_space_chips);
}
else
{
item_size_ = sizeof(gr_complex);
LOG(WARNING) << item_type << " unknown tracking item type.";
}
channel_ = 0;
DLOG(INFO) << "tracking(" << tracking_->unique_id() << ")";
}
GlonassL2CaDllPllTracking::~GlonassL2CaDllPllTracking()
{
}
void GlonassL2CaDllPllTracking::start_tracking()
{
tracking_->start_tracking();
}
/*
* Set tracking channel unique ID
*/
void GlonassL2CaDllPllTracking::set_channel(unsigned int channel)
{
channel_ = channel;
tracking_->set_channel(channel);
}
void GlonassL2CaDllPllTracking::set_gnss_synchro(Gnss_Synchro* p_gnss_synchro)
{
tracking_->set_gnss_synchro(p_gnss_synchro);
}
void GlonassL2CaDllPllTracking::connect(gr::top_block_sptr top_block)
{
if (top_block)
{ /* top_block is not null */
};
//nothing to connect, now the tracking uses gr_sync_decimator
}
void GlonassL2CaDllPllTracking::disconnect(gr::top_block_sptr top_block)
{
if (top_block)
{ /* top_block is not null */
};
//nothing to disconnect, now the tracking uses gr_sync_decimator
}
gr::basic_block_sptr GlonassL2CaDllPllTracking::get_left_block()
{
return tracking_;
}
gr::basic_block_sptr GlonassL2CaDllPllTracking::get_right_block()
{
return tracking_;
}

103
src/algorithms/tracking/adapters/glonass_l2_ca_dll_pll_tracking.h Normal file
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@ -0,0 +1,103 @@
/*!
* \file glonass_l2_ca_dll_pll_tracking.h
* \brief Interface of an adapter of a DLL+PLL tracking loop block
* for Glonass L2 C/A to a TrackingInterface
* \author Damian Miralles, 2018, dmiralles2009(at)gmail.com
*
*
* Code DLL + carrier PLL according to the algorithms described in:
* 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
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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_GLONASS_L2_CA_DLL_PLL_TRACKING_H_
#define GNSS_SDR_GLONASS_L2_CA_DLL_PLL_TRACKING_H_
#include "tracking_interface.h"
#include "glonass_l2_ca_dll_pll_tracking_cc.h"
#include <string>
class ConfigurationInterface;
/*!
* \brief This class implements a code DLL + carrier PLL tracking loop
*/
class GlonassL2CaDllPllTracking : public TrackingInterface
{
public:
GlonassL2CaDllPllTracking(ConfigurationInterface* configuration,
std::string role,
unsigned int in_streams,
unsigned int out_streams);
virtual ~GlonassL2CaDllPllTracking();
inline std::string role() override
{
return role_;
}
//! Returns "GLONASS_L1_CA_DLL_PLL_Tracking"
inline std::string implementation() override
{
return "GLONASS_L2_CA_DLL_PLL_Tracking";
}
inline size_t item_size() override
{
return item_size_;
}
void connect(gr::top_block_sptr top_block) override;
void disconnect(gr::top_block_sptr top_block) override;
gr::basic_block_sptr get_left_block() override;
gr::basic_block_sptr get_right_block() override;
/*!
* \brief Set tracking channel unique ID
*/
void set_channel(unsigned int channel) override;
/*!
* \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) override;
void start_tracking() override;
private:
glonass_l2_ca_dll_pll_tracking_cc_sptr tracking_;
size_t item_size_;
unsigned int channel_;
std::string role_;
unsigned int in_streams_;
unsigned int out_streams_;
};
#endif // GNSS_SDR_GLONASS_L2_CA_DLL_PLL_TRACKING_H_

3
src/algorithms/tracking/gnuradio_blocks/CMakeLists.txt
View File

@ -39,6 +39,9 @@ set(TRACKING_GR_BLOCKS_SOURCES
glonass_l1_ca_dll_pll_tracking_cc.cc
glonass_l1_ca_dll_pll_c_aid_tracking_cc.cc
glonass_l1_ca_dll_pll_c_aid_tracking_sc.cc
glonass_l2_ca_dll_pll_tracking_cc.cc
glonass_l2_ca_dll_pll_c_aid_tracking_cc.cc
glonass_l2_ca_dll_pll_c_aid_tracking_sc.cc
${OPT_TRACKING_BLOCKS}
)

10
src/algorithms/tracking/gnuradio_blocks/glonass_l1_ca_dll_pll_c_aid_tracking_cc.cc
View File

@ -40,7 +40,6 @@
#include "glonass_l1_signal_processing.h"
#include "tracking_discriminators.h"
#include "lock_detectors.h"
#include "GLONASS_L1_CA.h"
#include "gnss_sdr_flags.h"
#include "control_message_factory.h"
#include <boost/lexical_cast.hpp>
@ -54,8 +53,11 @@
#include <iostream>
#include <memory>
#include <sstream>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
#define CN0_ESTIMATION_SAMPLES 10
using google::LogMessage;
glonass_l1_ca_dll_pll_c_aid_tracking_cc_sptr
@ -750,7 +752,7 @@ int glonass_l1_ca_dll_pll_c_aid_tracking_cc::general_work(int noutput_items __at
d_rem_code_phase_chips = d_rem_code_phase_samples * (d_code_freq_chips / static_cast<double>(d_fs_in));
// ####### CN0 ESTIMATION AND LOCK DETECTORS #######################################
if (d_cn0_estimation_counter < FLAGS_cn0_samples)
if (d_cn0_estimation_counter < CN0_ESTIMATION_SAMPLES)
{
// fill buffer with prompt correlator output values
d_Prompt_buffer[d_cn0_estimation_counter] = d_correlator_outs[1]; // prompt
@ -760,9 +762,9 @@ int glonass_l1_ca_dll_pll_c_aid_tracking_cc::general_work(int noutput_items __at
{
d_cn0_estimation_counter = 0;
// Code lock indicator
d_CN0_SNV_dB_Hz = cn0_svn_estimator(d_Prompt_buffer, FLAGS_cn0_samples, d_fs_in, GLONASS_L1_CA_CODE_LENGTH_CHIPS);
d_CN0_SNV_dB_Hz = cn0_svn_estimator(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES, d_fs_in, GLONASS_L1_CA_CODE_LENGTH_CHIPS);
// Carrier lock indicator
d_carrier_lock_test = carrier_lock_detector(d_Prompt_buffer, FLAGS_cn0_samples);
d_carrier_lock_test = carrier_lock_detector(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES);
// Loss of lock detection
if (d_carrier_lock_test < d_carrier_lock_threshold or d_CN0_SNV_dB_Hz < FLAGS_cn0_min)
{

9
src/algorithms/tracking/gnuradio_blocks/glonass_l1_ca_dll_pll_c_aid_tracking_sc.cc
View File

@ -41,7 +41,6 @@
#include "glonass_l1_signal_processing.h"
#include "tracking_discriminators.h"
#include "lock_detectors.h"
#include "GLONASS_L1_CA.h"
#include "gnss_sdr_flags.h"
#include "control_message_factory.h"
#include <boost/bind.hpp>
@ -55,8 +54,10 @@
#include <iostream>
#include <memory>
#include <sstream>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
#define CN0_ESTIMATION_SAMPLES 10
using google::LogMessage;
glonass_l1_ca_dll_pll_c_aid_tracking_sc_sptr
@ -742,7 +743,7 @@ int glonass_l1_ca_dll_pll_c_aid_tracking_sc::general_work(int noutput_items __at
d_rem_code_phase_chips = d_rem_code_phase_samples * (d_code_freq_chips / static_cast<double>(d_fs_in));
// ####### CN0 ESTIMATION AND LOCK DETECTORS #######################################
if (d_cn0_estimation_counter < FLAGS_cn0_samples)
if (d_cn0_estimation_counter < CN0_ESTIMATION_SAMPLES)
{
// fill buffer with prompt correlator output values
d_Prompt_buffer[d_cn0_estimation_counter] = lv_cmake(static_cast<float>(d_correlator_outs_16sc[1].real()), static_cast<float>(d_correlator_outs_16sc[1].imag())); // prompt
@ -752,9 +753,9 @@ int glonass_l1_ca_dll_pll_c_aid_tracking_sc::general_work(int noutput_items __at
{
d_cn0_estimation_counter = 0;
// Code lock indicator
d_CN0_SNV_dB_Hz = cn0_svn_estimator(d_Prompt_buffer, FLAGS_cn0_samples, d_fs_in, GLONASS_L1_CA_CODE_LENGTH_CHIPS);
d_CN0_SNV_dB_Hz = cn0_svn_estimator(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES, d_fs_in, GLONASS_L1_CA_CODE_LENGTH_CHIPS);
// Carrier lock indicator
d_carrier_lock_test = carrier_lock_detector(d_Prompt_buffer, FLAGS_cn0_samples);
d_carrier_lock_test = carrier_lock_detector(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES);
// Loss of lock detection
if (d_carrier_lock_test < d_carrier_lock_threshold or d_CN0_SNV_dB_Hz < FLAGS_cn0_min)
{

10
src/algorithms/tracking/gnuradio_blocks/glonass_l1_ca_dll_pll_tracking_cc.cc
View File

@ -40,7 +40,6 @@
#include "glonass_l1_signal_processing.h"
#include "tracking_discriminators.h"
#include "lock_detectors.h"
#include "GLONASS_L1_CA.h"
#include "gnss_sdr_flags.h"
#include "control_message_factory.h"
#include <boost/lexical_cast.hpp>
@ -52,8 +51,9 @@
#include <iostream>
#include <memory>
#include <sstream>
#include "../../../core/system_parameters/GLONASS_L1_L2_CA.h"
#define CN0_ESTIMATION_SAMPLES 10
using google::LogMessage;
glonass_l1_ca_dll_pll_tracking_cc_sptr
@ -611,7 +611,7 @@ int Glonass_L1_Ca_Dll_Pll_Tracking_cc::general_work(int noutput_items __attribut
d_rem_code_phase_chips = d_code_freq_chips * (d_rem_code_phase_samples / static_cast<double>(d_fs_in));
// ####### CN0 ESTIMATION AND LOCK DETECTORS ######
if (d_cn0_estimation_counter < FLAGS_cn0_samples)
if (d_cn0_estimation_counter < CN0_ESTIMATION_SAMPLES)
{
// fill buffer with prompt correlator output values
d_Prompt_buffer[d_cn0_estimation_counter] = d_correlator_outs[1]; //prompt
@ -621,9 +621,9 @@ int Glonass_L1_Ca_Dll_Pll_Tracking_cc::general_work(int noutput_items __attribut
{
d_cn0_estimation_counter = 0;
// Code lock indicator
d_CN0_SNV_dB_Hz = cn0_svn_estimator(d_Prompt_buffer, FLAGS_cn0_samples, d_fs_in, GLONASS_L1_CA_CODE_LENGTH_CHIPS);
d_CN0_SNV_dB_Hz = cn0_svn_estimator(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES, d_fs_in, GLONASS_L1_CA_CODE_LENGTH_CHIPS);
// Carrier lock indicator
d_carrier_lock_test = carrier_lock_detector(d_Prompt_buffer, FLAGS_cn0_samples);
d_carrier_lock_test = carrier_lock_detector(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES);
// Loss of lock detection
if (d_carrier_lock_test < d_carrier_lock_threshold or d_CN0_SNV_dB_Hz < FLAGS_cn0_min)
{

921
src/algorithms/tracking/gnuradio_blocks/glonass_l2_ca_dll_pll_c_aid_tracking_cc.cc Normal file
View File

@ -0,0 +1,921 @@
/*!
* \file glonass_l2_ca_dll_pll_c_aid_tracking_cc.h
* \brief Implementation of a code DLL + carrier PLL tracking block
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
*
* Code DLL + carrier PLL according to the algorithms described in:
* 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
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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 "glonass_l2_ca_dll_pll_c_aid_tracking_cc.h"
#include "glonass_l2_signal_processing.h"
#include "tracking_discriminators.h"
#include "lock_detectors.h"
#include "GLONASS_L1_L2_CA.h"
#include "gnss_sdr_flags.h"
#include "control_message_factory.h"
#include <boost/lexical_cast.hpp>
#include <boost/bind.hpp>
#include <gnuradio/io_signature.h>
#include <matio.h>
#include <pmt/pmt.h>
#include <volk_gnsssdr/volk_gnsssdr.h>
#include <glog/logging.h>
#include <cmath>
#include <iostream>
#include <memory>
#include <sstream>
#define CN0_ESTIMATION_SAMPLES 10
using google::LogMessage;
glonass_l2_ca_dll_pll_c_aid_tracking_cc_sptr
glonass_l2_ca_dll_pll_c_aid_make_tracking_cc(
long if_freq,
long fs_in,
unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
int extend_correlation_ms,
float early_late_space_chips)
{
return glonass_l2_ca_dll_pll_c_aid_tracking_cc_sptr(new glonass_l2_ca_dll_pll_c_aid_tracking_cc(if_freq,
fs_in, vector_length, dump, dump_filename, pll_bw_hz, dll_bw_hz, pll_bw_narrow_hz, dll_bw_narrow_hz, extend_correlation_ms, early_late_space_chips));
}
void glonass_l2_ca_dll_pll_c_aid_tracking_cc::forecast(int noutput_items,
gr_vector_int &ninput_items_required)
{
if (noutput_items != 0)
{
ninput_items_required[0] = static_cast<int>(d_vector_length) * 2; //set the required available samples in each call
}
}
void glonass_l2_ca_dll_pll_c_aid_tracking_cc::msg_handler_preamble_index(pmt::pmt_t msg)
{
//pmt::print(msg);
DLOG(INFO) << "Extended correlation enabled for Tracking CH " << d_channel << ": Satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN);
if (d_enable_extended_integration == false) //avoid re-setting preamble indicator
{
d_preamble_timestamp_s = pmt::to_double(msg);
d_enable_extended_integration = true;
d_preamble_synchronized = false;
}
}
glonass_l2_ca_dll_pll_c_aid_tracking_cc::glonass_l2_ca_dll_pll_c_aid_tracking_cc(
long if_freq,
long fs_in,
unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
int extend_correlation_ms,
float early_late_space_chips) : gr::block("glonass_l2_ca_dll_pll_c_aid_tracking_cc", gr::io_signature::make(1, 1, sizeof(gr_complex)),
gr::io_signature::make(1, 1, sizeof(Gnss_Synchro)))
{
// Telemetry bit synchronization message port input
this->message_port_register_in(pmt::mp("preamble_timestamp_s"));
this->set_msg_handler(pmt::mp("preamble_timestamp_s"),
boost::bind(&glonass_l2_ca_dll_pll_c_aid_tracking_cc::msg_handler_preamble_index, this, _1));
this->message_port_register_out(pmt::mp("events"));
// initialize internal vars
d_dump = dump;
d_if_freq = if_freq;
d_fs_in = fs_in;
d_vector_length = vector_length;
d_dump_filename = dump_filename;
d_correlation_length_samples = static_cast<int>(d_vector_length);
// Initialize tracking ==========================================
d_pll_bw_hz = pll_bw_hz;
d_dll_bw_hz = dll_bw_hz;
d_pll_bw_narrow_hz = pll_bw_narrow_hz;
d_dll_bw_narrow_hz = dll_bw_narrow_hz;
d_extend_correlation_ms = extend_correlation_ms;
d_code_loop_filter.set_DLL_BW(d_dll_bw_hz);
d_carrier_loop_filter.set_params(10.0, d_pll_bw_hz, 2);
// --- DLL variables --------------------------------------------------------
d_early_late_spc_chips = early_late_space_chips; // Define early-late offset (in chips)
// Initialization of local code replica
// Get space for a vector with the C/A code replica sampled 1x/chip
d_ca_code = static_cast<gr_complex *>(volk_gnsssdr_malloc(static_cast<int>(GLONASS_L2_CA_CODE_LENGTH_CHIPS) * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
// correlator outputs (scalar)
d_n_correlator_taps = 3; // Early, Prompt, and Late
d_correlator_outs = static_cast<gr_complex *>(volk_gnsssdr_malloc(d_n_correlator_taps * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
for (int n = 0; n < d_n_correlator_taps; n++)
{
d_correlator_outs[n] = gr_complex(0, 0);
}
d_local_code_shift_chips = static_cast<float *>(volk_gnsssdr_malloc(d_n_correlator_taps * sizeof(float), volk_gnsssdr_get_alignment()));
// Set TAPs delay values [chips]
d_local_code_shift_chips[0] = -d_early_late_spc_chips;
d_local_code_shift_chips[1] = 0.0;
d_local_code_shift_chips[2] = d_early_late_spc_chips;
multicorrelator_cpu.init(2 * d_correlation_length_samples, d_n_correlator_taps);
//--- Perform initializations ------------------------------
// define initial code frequency basis of NCO
d_code_freq_chips = GLONASS_L2_CA_CODE_RATE_HZ;
// define residual code phase (in chips)
d_rem_code_phase_samples = 0.0;
// define residual carrier phase
d_rem_carrier_phase_rad = 0.0;
// sample synchronization
d_sample_counter = 0; //(from trk to tlm)
d_acq_sample_stamp = 0;
d_enable_tracking = false;
d_pull_in = false;
// CN0 estimation and lock detector buffers
d_cn0_estimation_counter = 0;
d_Prompt_buffer = new gr_complex[FLAGS_cn0_samples];
d_carrier_lock_test = 1;
d_CN0_SNV_dB_Hz = 0;
d_carrier_lock_fail_counter = 0;
d_carrier_lock_threshold = FLAGS_carrier_lock_th;
systemName["R"] = std::string("Glonass");
set_relative_rate(1.0 / static_cast<double>(d_vector_length));
d_acquisition_gnss_synchro = 0;
d_channel = 0;
d_acq_code_phase_samples = 0.0;
d_acq_carrier_doppler_hz = 0.0;
d_carrier_doppler_hz = 0.0;
d_code_error_filt_chips_Ti = 0.0;
d_acc_carrier_phase_cycles = 0.0;
d_code_phase_samples = 0.0;
d_pll_to_dll_assist_secs_Ti = 0.0;
d_rem_code_phase_chips = 0.0;
d_code_phase_step_chips = 0.0;
d_carrier_phase_step_rad = 0.0;
d_enable_extended_integration = false;
d_preamble_synchronized = false;
d_rem_code_phase_integer_samples = 0;
d_code_error_chips_Ti = 0.0;
d_code_error_filt_chips_s = 0.0;
d_carr_phase_error_secs_Ti = 0.0;
d_preamble_timestamp_s = 0.0;
d_carrier_frequency_hz = 0.0;
d_carrier_doppler_old_hz = 0.0;
d_glonass_freq_ch = 0;
//set_min_output_buffer((long int)300);
}
void glonass_l2_ca_dll_pll_c_aid_tracking_cc::start_tracking()
{
/*
* correct the code phase according to the delay between acq and trk
*/
d_acq_code_phase_samples = d_acquisition_gnss_synchro->Acq_delay_samples;
d_acq_carrier_doppler_hz = d_acquisition_gnss_synchro->Acq_doppler_hz;
d_acq_sample_stamp = d_acquisition_gnss_synchro->Acq_samplestamp_samples;
long int acq_trk_diff_samples;
double acq_trk_diff_seconds;
acq_trk_diff_samples = static_cast<long int>(d_sample_counter) - static_cast<long int>(d_acq_sample_stamp); //-d_vector_length;
DLOG(INFO) << "Number of samples between Acquisition and Tracking =" << acq_trk_diff_samples;
acq_trk_diff_seconds = static_cast<double>(acq_trk_diff_samples) / static_cast<double>(d_fs_in);
// Doppler effect
// Fd=(C/(C+Vr))*F
d_glonass_freq_ch = GLONASS_L2_CA_FREQ_HZ + (DFRQ2_GLO * static_cast<double>(GLONASS_PRN.at(d_acquisition_gnss_synchro->PRN)));
double radial_velocity = (d_glonass_freq_ch + d_acq_carrier_doppler_hz) / d_glonass_freq_ch;
// new chip and prn sequence periods based on acq Doppler
double T_chip_mod_seconds;
double T_prn_mod_seconds;
double T_prn_mod_samples;
d_code_freq_chips = radial_velocity * GLONASS_L2_CA_CODE_RATE_HZ;
d_code_phase_step_chips = static_cast<double>(d_code_freq_chips) / static_cast<double>(d_fs_in);
T_chip_mod_seconds = 1.0 / d_code_freq_chips;
T_prn_mod_seconds = T_chip_mod_seconds * GLONASS_L2_CA_CODE_LENGTH_CHIPS;
T_prn_mod_samples = T_prn_mod_seconds * static_cast<double>(d_fs_in);
d_correlation_length_samples = round(T_prn_mod_samples);
double T_prn_true_seconds = GLONASS_L2_CA_CODE_LENGTH_CHIPS / GLONASS_L2_CA_CODE_RATE_HZ;
double T_prn_true_samples = T_prn_true_seconds * static_cast<double>(d_fs_in);
double T_prn_diff_seconds = T_prn_true_seconds - T_prn_mod_seconds;
double N_prn_diff = acq_trk_diff_seconds / T_prn_true_seconds;
double corrected_acq_phase_samples, delay_correction_samples;
corrected_acq_phase_samples = fmod((d_acq_code_phase_samples + T_prn_diff_seconds * N_prn_diff * static_cast<double>(d_fs_in)), T_prn_true_samples);
if (corrected_acq_phase_samples < 0)
{
corrected_acq_phase_samples = T_prn_mod_samples + corrected_acq_phase_samples;
}
delay_correction_samples = d_acq_code_phase_samples - corrected_acq_phase_samples;
d_acq_code_phase_samples = corrected_acq_phase_samples;
// d_carrier_doppler_hz = d_acq_carrier_doppler_hz + d_if_freq + (DFRQ2_GLO * GLONASS_PRN.at(d_acquisition_gnss_synchro->PRN));
// d_carrier_doppler_hz = d_acq_carrier_doppler_hz;
// d_carrier_phase_step_rad = GLONASS_TWO_PI * d_carrier_doppler_hz / static_cast<double>(d_fs_in);
d_carrier_frequency_hz = d_acq_carrier_doppler_hz + d_if_freq + (DFRQ2_GLO * static_cast<double>(GLONASS_PRN.at(d_acquisition_gnss_synchro->PRN)));
d_carrier_doppler_hz = d_acq_carrier_doppler_hz;
d_carrier_phase_step_rad = GLONASS_TWO_PI * d_carrier_frequency_hz / static_cast<double>(d_fs_in);
// DLL/PLL filter initialization
d_carrier_loop_filter.initialize(d_carrier_frequency_hz); // The carrier loop filter implements the Doppler accumulator
d_code_loop_filter.initialize(); // initialize the code filter
// generate local reference ALWAYS starting at chip 1 (1 sample per chip)
glonass_l2_ca_code_gen_complex(d_ca_code, 0);
multicorrelator_cpu.set_local_code_and_taps(static_cast<int>(GLONASS_L2_CA_CODE_LENGTH_CHIPS), d_ca_code, d_local_code_shift_chips);
for (int n = 0; n < d_n_correlator_taps; n++)
{
d_correlator_outs[n] = gr_complex(0, 0);
}
d_carrier_lock_fail_counter = 0;
d_rem_code_phase_samples = 0.0;
d_rem_carrier_phase_rad = 0.0;
d_rem_code_phase_chips = 0.0;
d_acc_carrier_phase_cycles = 0.0;
d_pll_to_dll_assist_secs_Ti = 0.0;
d_code_phase_samples = d_acq_code_phase_samples;
std::string sys_ = &d_acquisition_gnss_synchro->System;
sys = sys_.substr(0, 1);
// DEBUG OUTPUT
std::cout << "Tracking start on channel " << d_channel << " for satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN) << std::endl;
LOG(INFO) << "Starting tracking of satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN) << " on channel " << d_channel;
// enable tracking
d_pull_in = true;
d_enable_tracking = true;
d_enable_extended_integration = false;
d_preamble_synchronized = false;
LOG(INFO) << "PULL-IN Doppler [Hz]=" << d_carrier_doppler_hz
<< " Code Phase correction [samples]=" << delay_correction_samples
<< " PULL-IN Code Phase [samples]=" << d_acq_code_phase_samples;
}
glonass_l2_ca_dll_pll_c_aid_tracking_cc::~glonass_l2_ca_dll_pll_c_aid_tracking_cc()
{
if (d_dump_file.is_open())
{
try
{
d_dump_file.close();
}
catch (const std::exception &ex)
{
LOG(WARNING) << "Exception in destructor " << ex.what();
}
}
if (d_dump)
{
if (d_channel == 0)
{
std::cout << "Writing .mat files ...";
}
glonass_l2_ca_dll_pll_c_aid_tracking_cc::save_matfile();
if (d_channel == 0)
{
std::cout << " done." << std::endl;
}
}
try
{
volk_gnsssdr_free(d_local_code_shift_chips);
volk_gnsssdr_free(d_correlator_outs);
volk_gnsssdr_free(d_ca_code);
delete[] d_Prompt_buffer;
multicorrelator_cpu.free();
}
catch (const std::exception &ex)
{
LOG(WARNING) << "Exception in destructor " << ex.what();
}
}
int glonass_l2_ca_dll_pll_c_aid_tracking_cc::save_matfile()
{
// READ DUMP FILE
std::ifstream::pos_type size;
int number_of_double_vars = 11;
int number_of_float_vars = 5;
int epoch_size_bytes = sizeof(unsigned long int) + sizeof(double) * number_of_double_vars +
sizeof(float) * number_of_float_vars + sizeof(unsigned int);
std::ifstream dump_file;
dump_file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
try
{
dump_file.open(d_dump_filename.c_str(), std::ios::binary | std::ios::ate);
}
catch (const std::ifstream::failure &e)
{
std::cerr << "Problem opening dump file:" << e.what() << std::endl;
return 1;
}
// count number of epochs and rewind
long int num_epoch = 0;
if (dump_file.is_open())
{
size = dump_file.tellg();
num_epoch = static_cast<long int>(size) / static_cast<long int>(epoch_size_bytes);
dump_file.seekg(0, std::ios::beg);
}
else
{
return 1;
}
float *abs_E = new float[num_epoch];
float *abs_P = new float[num_epoch];
float *abs_L = new float[num_epoch];
float *Prompt_I = new float[num_epoch];
float *Prompt_Q = new float[num_epoch];
unsigned long int *PRN_start_sample_count = new unsigned long int[num_epoch];
double *acc_carrier_phase_rad = new double[num_epoch];
double *carrier_doppler_hz = new double[num_epoch];
double *code_freq_chips = new double[num_epoch];
double *carr_error_hz = new double[num_epoch];
double *carr_error_filt_hz = new double[num_epoch];
double *code_error_chips = new double[num_epoch];
double *code_error_filt_chips = new double[num_epoch];
double *CN0_SNV_dB_Hz = new double[num_epoch];
double *carrier_lock_test = new double[num_epoch];
double *aux1 = new double[num_epoch];
double *aux2 = new double[num_epoch];
unsigned int *PRN = new unsigned int[num_epoch];
try
{
if (dump_file.is_open())
{
for (long int i = 0; i < num_epoch; i++)
{
dump_file.read(reinterpret_cast<char *>(&abs_E[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&abs_P[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&abs_L[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&Prompt_I[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&Prompt_Q[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&PRN_start_sample_count[i]), sizeof(unsigned long int));
dump_file.read(reinterpret_cast<char *>(&acc_carrier_phase_rad[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carrier_doppler_hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&code_freq_chips[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carr_error_hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carr_error_filt_hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&code_error_chips[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&code_error_filt_chips[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&CN0_SNV_dB_Hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carrier_lock_test[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&aux1[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&aux2[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&PRN[i]), sizeof(unsigned int));
}
}
dump_file.close();
}
catch (const std::ifstream::failure &e)
{
std::cerr << "Problem reading dump file:" << e.what() << std::endl;
delete[] abs_E;
delete[] abs_P;
delete[] abs_L;
delete[] Prompt_I;
delete[] Prompt_Q;
delete[] PRN_start_sample_count;
delete[] acc_carrier_phase_rad;
delete[] carrier_doppler_hz;
delete[] code_freq_chips;
delete[] carr_error_hz;
delete[] carr_error_filt_hz;
delete[] code_error_chips;
delete[] code_error_filt_chips;
delete[] CN0_SNV_dB_Hz;
delete[] carrier_lock_test;
delete[] aux1;
delete[] aux2;
delete[] PRN;
return 1;
}
// WRITE MAT FILE
mat_t *matfp;
matvar_t *matvar;
std::string filename = d_dump_filename;
filename.erase(filename.length() - 4, 4);
filename.append(".mat");
matfp = Mat_CreateVer(filename.c_str(), NULL, MAT_FT_MAT73);
if (reinterpret_cast<long *>(matfp) != NULL)
{
size_t dims[2] = {1, static_cast<size_t>(num_epoch)};
matvar = Mat_VarCreate("abs_E", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, abs_E, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("abs_P", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, abs_P, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("abs_L", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, abs_L, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("Prompt_I", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, Prompt_I, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("Prompt_Q", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, Prompt_Q, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("PRN_start_sample_count", MAT_C_UINT64, MAT_T_UINT64, 2, dims, PRN_start_sample_count, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("acc_carrier_phase_rad", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, acc_carrier_phase_rad, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carrier_doppler_hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carrier_doppler_hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("code_freq_chips", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, code_freq_chips, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carr_error_hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carr_error_hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carr_error_filt_hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carr_error_filt_hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("code_error_chips", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, code_error_chips, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("code_error_filt_chips", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, code_error_filt_chips, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("CN0_SNV_dB_Hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, CN0_SNV_dB_Hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carrier_lock_test", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carrier_lock_test, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("aux1", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, aux1, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("aux2", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, aux2, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("PRN", MAT_C_UINT32, MAT_T_UINT32, 2, dims, PRN, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
}
Mat_Close(matfp);
delete[] abs_E;
delete[] abs_P;
delete[] abs_L;
delete[] Prompt_I;
delete[] Prompt_Q;
delete[] PRN_start_sample_count;
delete[] acc_carrier_phase_rad;
delete[] carrier_doppler_hz;
delete[] code_freq_chips;
delete[] carr_error_hz;
delete[] carr_error_filt_hz;
delete[] code_error_chips;
delete[] code_error_filt_chips;
delete[] CN0_SNV_dB_Hz;
delete[] carrier_lock_test;
delete[] aux1;
delete[] aux2;
delete[] PRN;
return 0;
}
int glonass_l2_ca_dll_pll_c_aid_tracking_cc::general_work(int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
{
// Block input data and block output stream pointers
const gr_complex *in = reinterpret_cast<const gr_complex *>(input_items[0]); // PRN start block alignment
Gnss_Synchro **out = reinterpret_cast<Gnss_Synchro **>(&output_items[0]);
// GNSS_SYNCHRO OBJECT to interchange data between tracking->telemetry_decoder
Gnss_Synchro current_synchro_data = Gnss_Synchro();
// process vars
double code_error_filt_secs_Ti = 0.0;
double CURRENT_INTEGRATION_TIME_S = 0.0;
double CORRECTED_INTEGRATION_TIME_S = 0.0;
if (d_enable_tracking == true)
{
// Fill the acquisition data
current_synchro_data = *d_acquisition_gnss_synchro;
// Receiver signal alignment
if (d_pull_in == true)
{
int samples_offset;
double acq_trk_shif_correction_samples;
int acq_to_trk_delay_samples;
acq_to_trk_delay_samples = d_sample_counter - d_acq_sample_stamp;
acq_trk_shif_correction_samples = d_correlation_length_samples - fmod(static_cast<double>(acq_to_trk_delay_samples), static_cast<double>(d_correlation_length_samples));
samples_offset = round(d_acq_code_phase_samples + acq_trk_shif_correction_samples);
current_synchro_data.Tracking_sample_counter = d_sample_counter + samples_offset;
d_sample_counter += samples_offset; // count for the processed samples
d_pull_in = false;
d_acc_carrier_phase_cycles -= d_carrier_phase_step_rad * samples_offset / GLONASS_TWO_PI;
current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_cycles * GLONASS_TWO_PI;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.fs = d_fs_in;
*out[0] = current_synchro_data;
consume_each(samples_offset); // shift input to perform alignment with local replica
return 1;
}
// ################# CARRIER WIPEOFF AND CORRELATORS ##############################
// perform carrier wipe-off and compute Early, Prompt and Late correlation
multicorrelator_cpu.set_input_output_vectors(d_correlator_outs, in);
multicorrelator_cpu.Carrier_wipeoff_multicorrelator_resampler(d_rem_carrier_phase_rad,
d_carrier_phase_step_rad,
d_rem_code_phase_chips,
d_code_phase_step_chips,
d_correlation_length_samples);
// ####### coherent intergration extension
// keep the last symbols
d_E_history.push_back(d_correlator_outs[0]); // save early output
d_P_history.push_back(d_correlator_outs[1]); // save prompt output
d_L_history.push_back(d_correlator_outs[2]); // save late output
if (static_cast<int>(d_P_history.size()) > d_extend_correlation_ms)
{
d_E_history.pop_front();
d_P_history.pop_front();
d_L_history.pop_front();
}
bool enable_dll_pll;
if (d_enable_extended_integration == true)
{
long int symbol_diff = round(1000.0 * ((static_cast<double>(d_sample_counter) + d_rem_code_phase_samples) / static_cast<double>(d_fs_in) - d_preamble_timestamp_s));
if (symbol_diff > 0 and symbol_diff % d_extend_correlation_ms == 0)
{
// compute coherent integration and enable tracking loop
// perform coherent integration using correlator output history
// std::cout<<"##### RESET COHERENT INTEGRATION ####"<<std::endl;
d_correlator_outs[0] = gr_complex(0.0, 0.0);
d_correlator_outs[1] = gr_complex(0.0, 0.0);
d_correlator_outs[2] = gr_complex(0.0, 0.0);
for (int n = 0; n < d_extend_correlation_ms; n++)
{
d_correlator_outs[0] += d_E_history.at(n);
d_correlator_outs[1] += d_P_history.at(n);
d_correlator_outs[2] += d_L_history.at(n);
}
if (d_preamble_synchronized == false)
{
d_code_loop_filter.set_DLL_BW(d_dll_bw_narrow_hz);
d_carrier_loop_filter.set_params(10.0, d_pll_bw_narrow_hz, 2);
d_preamble_synchronized = true;
std::cout << "Enabled " << d_extend_correlation_ms << " [ms] extended correlator for CH " << d_channel << " : Satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN)
<< " pll_bw = " << d_pll_bw_hz << " [Hz], pll_narrow_bw = " << d_pll_bw_narrow_hz << " [Hz]" << std::endl
<< " dll_bw = " << d_dll_bw_hz << " [Hz], dll_narrow_bw = " << d_dll_bw_narrow_hz << " [Hz]" << std::endl;
}
// UPDATE INTEGRATION TIME
CURRENT_INTEGRATION_TIME_S = static_cast<double>(d_extend_correlation_ms) * GLONASS_L2_CA_CODE_PERIOD;
d_code_loop_filter.set_pdi(CURRENT_INTEGRATION_TIME_S);
enable_dll_pll = true;
}
else
{
if (d_preamble_synchronized == true)
{
// continue extended coherent correlation
// Compute the next buffer length based on the period of the PRN sequence and the code phase error estimation
double T_chip_seconds = 1.0 / d_code_freq_chips;
double T_prn_seconds = T_chip_seconds * GLONASS_L2_CA_CODE_LENGTH_CHIPS;
double T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
int K_prn_samples = round(T_prn_samples);
double K_T_prn_error_samples = K_prn_samples - T_prn_samples;
d_rem_code_phase_samples = d_rem_code_phase_samples - K_T_prn_error_samples;
d_rem_code_phase_integer_samples = round(d_rem_code_phase_samples); // round to a discrete number of samples
d_correlation_length_samples = K_prn_samples + d_rem_code_phase_integer_samples;
d_rem_code_phase_samples = d_rem_code_phase_samples - d_rem_code_phase_integer_samples;
// code phase step (Code resampler phase increment per sample) [chips/sample]
d_code_phase_step_chips = d_code_freq_chips / static_cast<double>(d_fs_in);
// remnant code phase [chips]
d_rem_code_phase_chips = d_rem_code_phase_samples * (d_code_freq_chips / static_cast<double>(d_fs_in));
d_rem_carrier_phase_rad = fmod(d_rem_carrier_phase_rad + d_carrier_phase_step_rad * static_cast<double>(d_correlation_length_samples), GLONASS_TWO_PI);
// UPDATE ACCUMULATED CARRIER PHASE
CORRECTED_INTEGRATION_TIME_S = (static_cast<double>(d_correlation_length_samples) / static_cast<double>(d_fs_in));
d_acc_carrier_phase_cycles -= d_carrier_phase_step_rad * d_correlation_length_samples / GLONASS_TWO_PI;
// disable tracking loop and inform telemetry decoder
enable_dll_pll = false;
}
else
{
// perform basic (1ms) correlation
// UPDATE INTEGRATION TIME
CURRENT_INTEGRATION_TIME_S = static_cast<double>(d_correlation_length_samples) / static_cast<double>(d_fs_in);
d_code_loop_filter.set_pdi(CURRENT_INTEGRATION_TIME_S);
enable_dll_pll = true;
}
}
}
else
{
// UPDATE INTEGRATION TIME
CURRENT_INTEGRATION_TIME_S = static_cast<double>(d_correlation_length_samples) / static_cast<double>(d_fs_in);
enable_dll_pll = true;
}
if (enable_dll_pll == true)
{
// ################## PLL ##########################################################
// Update PLL discriminator [rads/Ti -> Secs/Ti]
d_carr_phase_error_secs_Ti = pll_cloop_two_quadrant_atan(d_correlator_outs[1]) / GLONASS_TWO_PI; // prompt output
d_carrier_doppler_old_hz = d_carrier_doppler_hz;
// Carrier discriminator filter
// NOTICE: The carrier loop filter includes the Carrier Doppler accumulator, as described in Kaplan
// Input [s/Ti] -> output [Hz]
d_carrier_doppler_hz = d_carrier_loop_filter.get_carrier_error(0.0, d_carr_phase_error_secs_Ti, CURRENT_INTEGRATION_TIME_S);
// PLL to DLL assistance [Secs/Ti]
d_pll_to_dll_assist_secs_Ti = (d_carrier_doppler_hz * CURRENT_INTEGRATION_TIME_S) / d_glonass_freq_ch;
// code Doppler frequency update
d_code_freq_chips = GLONASS_L2_CA_CODE_RATE_HZ + (((d_carrier_doppler_hz - d_carrier_doppler_old_hz) * GLONASS_L2_CA_CODE_RATE_HZ) / d_glonass_freq_ch);
// ################## DLL ##########################################################
// DLL discriminator
d_code_error_chips_Ti = dll_nc_e_minus_l_normalized(d_correlator_outs[0], d_correlator_outs[2]); // [chips/Ti] //early and late
// Code discriminator filter
d_code_error_filt_chips_s = d_code_loop_filter.get_code_nco(d_code_error_chips_Ti); // input [chips/Ti] -> output [chips/second]
d_code_error_filt_chips_Ti = d_code_error_filt_chips_s * CURRENT_INTEGRATION_TIME_S;
code_error_filt_secs_Ti = d_code_error_filt_chips_Ti / d_code_freq_chips; // [s/Ti]
// ################## CARRIER AND CODE NCO BUFFER ALIGNEMENT #######################
// keep alignment parameters for the next input buffer
// Compute the next buffer length based in the new period of the PRN sequence and the code phase error estimation
double T_chip_seconds = 1.0 / d_code_freq_chips;
double T_prn_seconds = T_chip_seconds * GLONASS_L2_CA_CODE_LENGTH_CHIPS;
double T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
double K_prn_samples = round(T_prn_samples);
double K_T_prn_error_samples = K_prn_samples - T_prn_samples;
d_rem_code_phase_samples = d_rem_code_phase_samples - K_T_prn_error_samples + code_error_filt_secs_Ti * static_cast<double>(d_fs_in); //(code_error_filt_secs_Ti + d_pll_to_dll_assist_secs_Ti) * static_cast<double>(d_fs_in);
d_rem_code_phase_integer_samples = round(d_rem_code_phase_samples); // round to a discrete number of samples
d_correlation_length_samples = K_prn_samples + d_rem_code_phase_integer_samples;
d_rem_code_phase_samples = d_rem_code_phase_samples - d_rem_code_phase_integer_samples;
//################### PLL COMMANDS #################################################
//carrier phase step (NCO phase increment per sample) [rads/sample]
d_carrier_phase_step_rad = GLONASS_TWO_PI * d_carrier_doppler_hz / static_cast<double>(d_fs_in);
d_acc_carrier_phase_cycles -= d_carrier_phase_step_rad * d_correlation_length_samples / GLONASS_TWO_PI;
// UPDATE ACCUMULATED CARRIER PHASE
CORRECTED_INTEGRATION_TIME_S = (static_cast<double>(d_correlation_length_samples) / static_cast<double>(d_fs_in));
//remnant carrier phase [rad]
d_rem_carrier_phase_rad = fmod(d_rem_carrier_phase_rad + GLONASS_TWO_PI * d_carrier_doppler_hz * CORRECTED_INTEGRATION_TIME_S, GLONASS_TWO_PI);
//################### DLL COMMANDS #################################################
//code phase step (Code resampler phase increment per sample) [chips/sample]
d_code_phase_step_chips = d_code_freq_chips / static_cast<double>(d_fs_in);
//remnant code phase [chips]
d_rem_code_phase_chips = d_rem_code_phase_samples * (d_code_freq_chips / static_cast<double>(d_fs_in));
// ####### CN0 ESTIMATION AND LOCK DETECTORS #######################################
if (d_cn0_estimation_counter < CN0_ESTIMATION_SAMPLES)
{
// fill buffer with prompt correlator output values
d_Prompt_buffer[d_cn0_estimation_counter] = d_correlator_outs[1]; // prompt
d_cn0_estimation_counter++;
}
else
{
d_cn0_estimation_counter = 0;
// Code lock indicator
d_CN0_SNV_dB_Hz = cn0_svn_estimator(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES, d_fs_in, GLONASS_L2_CA_CODE_LENGTH_CHIPS);
// Carrier lock indicator
d_carrier_lock_test = carrier_lock_detector(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES);
// Loss of lock detection
if (d_carrier_lock_test < d_carrier_lock_threshold or d_CN0_SNV_dB_Hz < FLAGS_cn0_min)
{
d_carrier_lock_fail_counter++;
}
else
{
if (d_carrier_lock_fail_counter > 0) d_carrier_lock_fail_counter--;
}
if (d_carrier_lock_fail_counter > FLAGS_max_lock_fail)
{
std::cout << "Loss of lock in channel " << d_channel << "!" << std::endl;
LOG(INFO) << "Loss of lock in channel " << d_channel << "!";
this->message_port_pub(pmt::mp("events"), pmt::from_long(3)); //3 -> loss of lock
d_carrier_lock_fail_counter = 0;
d_enable_tracking = false; // TODO: check if disabling tracking is consistent with the channel state machine
}
}
// ########### Output the tracking data to navigation and PVT ##########
current_synchro_data.Prompt_I = static_cast<double>((d_correlator_outs[1]).real());
current_synchro_data.Prompt_Q = static_cast<double>((d_correlator_outs[1]).imag());
current_synchro_data.Tracking_sample_counter = d_sample_counter + d_correlation_length_samples;
current_synchro_data.Code_phase_samples = d_rem_code_phase_samples;
current_synchro_data.Carrier_phase_rads = GLONASS_TWO_PI * d_acc_carrier_phase_cycles;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
current_synchro_data.Flag_valid_symbol_output = true;
if (d_preamble_synchronized == true)
{
current_synchro_data.correlation_length_ms = d_extend_correlation_ms;
}
else
{
current_synchro_data.correlation_length_ms = 1;
}
}
else
{
current_synchro_data.Prompt_I = static_cast<double>((d_correlator_outs[1]).real());
current_synchro_data.Prompt_Q = static_cast<double>((d_correlator_outs[1]).imag());
current_synchro_data.Tracking_sample_counter = d_sample_counter + d_correlation_length_samples;
current_synchro_data.Code_phase_samples = d_rem_code_phase_samples;
current_synchro_data.Carrier_phase_rads = GLONASS_TWO_PI * d_acc_carrier_phase_cycles;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz; // todo: project the carrier doppler
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
}
}
else
{
for (int n = 0; n < d_n_correlator_taps; n++)
{
d_correlator_outs[n] = gr_complex(0, 0);
}
current_synchro_data.System = {'R'};
current_synchro_data.Tracking_sample_counter = d_sample_counter + d_correlation_length_samples;
}
//assign the GNURadio block output data
current_synchro_data.fs = d_fs_in;
*out[0] = current_synchro_data;
if (d_dump)
{
// MULTIPLEXED FILE RECORDING - Record results to file
float prompt_I;
float prompt_Q;
float tmp_E, tmp_P, tmp_L;
double tmp_double;
prompt_I = d_correlator_outs[1].real();
prompt_Q = d_correlator_outs[1].imag();
tmp_E = std::abs<float>(d_correlator_outs[0]);
tmp_P = std::abs<float>(d_correlator_outs[1]);
tmp_L = std::abs<float>(d_correlator_outs[2]);
try
{
// EPR
d_dump_file.write(reinterpret_cast<char *>(&tmp_E), sizeof(float));
d_dump_file.write(reinterpret_cast<char *>(&tmp_P), sizeof(float));
d_dump_file.write(reinterpret_cast<char *>(&tmp_L), sizeof(float));
// PROMPT I and Q (to analyze navigation symbols)
d_dump_file.write(reinterpret_cast<char *>(&prompt_I), sizeof(float));
d_dump_file.write(reinterpret_cast<char *>(&prompt_Q), sizeof(float));
// PRN start sample stamp
//tmp_float=(float)d_sample_counter;
d_dump_file.write(reinterpret_cast<char *>(&d_sample_counter), sizeof(unsigned long int));
// accumulated carrier phase
d_dump_file.write(reinterpret_cast<char *>(&d_acc_carrier_phase_cycles), sizeof(double));
// carrier and code frequency
double if_freq_carrier = d_carrier_doppler_hz + d_if_freq + (DFRQ2_GLO * static_cast<double>(GLONASS_PRN.at(d_acquisition_gnss_synchro->PRN)));
d_dump_file.write(reinterpret_cast<char *>(&if_freq_carrier), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&d_code_freq_chips), sizeof(double));
//PLL commands
d_dump_file.write(reinterpret_cast<char *>(&d_carr_phase_error_secs_Ti), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&d_carrier_doppler_hz), sizeof(double));
//DLL commands
d_dump_file.write(reinterpret_cast<char *>(&d_code_error_chips_Ti), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&d_code_error_filt_chips_Ti), sizeof(double));
// CN0 and carrier lock test
d_dump_file.write(reinterpret_cast<char *>(&d_CN0_SNV_dB_Hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&d_carrier_lock_test), sizeof(double));
// AUX vars (for debug purposes)
tmp_double = d_code_error_chips_Ti * CURRENT_INTEGRATION_TIME_S;
d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double));
tmp_double = static_cast<double>(d_sample_counter + d_correlation_length_samples);
d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double));
// PRN
unsigned int prn_ = d_acquisition_gnss_synchro->PRN;
d_dump_file.write(reinterpret_cast<char *>(&prn_), sizeof(unsigned int));
}
catch (const std::ifstream::failure *e)
{
LOG(WARNING) << "Exception writing trk dump file " << e->what();
}
}
consume_each(d_correlation_length_samples); // this is necessary in gr::block derivates
d_sample_counter += d_correlation_length_samples; //count for the processed samples
return 1; //output tracking result ALWAYS even in the case of d_enable_tracking==false
}
void glonass_l2_ca_dll_pll_c_aid_tracking_cc::set_channel(unsigned int channel)
{
d_channel = channel;
LOG(INFO) << "Tracking Channel set to " << d_channel;
// ############# ENABLE DATA FILE LOG #################
if (d_dump == true)
{
if (d_dump_file.is_open() == false)
{
try
{
d_dump_filename.append(boost::lexical_cast<std::string>(d_channel));
d_dump_filename.append(".dat");
d_dump_file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
d_dump_file.open(d_dump_filename.c_str(), std::ios::out | std::ios::binary);
LOG(INFO) << "Tracking dump enabled on channel " << d_channel << " Log file: " << d_dump_filename.c_str() << std::endl;
}
catch (const std::ifstream::failure *e)
{
LOG(WARNING) << "channel " << d_channel << " Exception opening trk dump file " << e->what() << std::endl;
}
}
}
}
void glonass_l2_ca_dll_pll_c_aid_tracking_cc::set_gnss_synchro(Gnss_Synchro *p_gnss_synchro)
{
d_acquisition_gnss_synchro = p_gnss_synchro;
}

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/*!
* \file glonass_l2_ca_dll_pll_c_aid_tracking_cc.h
* \brief Implementation of a code DLL + carrier PLL tracking block
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
*
* Code DLL + carrier PLL according to the algorithms described in:
* 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
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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_GLONASS_L2_CA_DLL_PLL_C_AID_TRACKING_CC_H
#define GNSS_SDR_GLONASS_L2_CA_DLL_PLL_C_AID_TRACKING_CC_H
#include "gnss_synchro.h"
#include "tracking_2nd_DLL_filter.h"
#include "tracking_FLL_PLL_filter.h"
//#include "tracking_loop_filter.h"
#include "cpu_multicorrelator.h"
#include <gnuradio/block.h>
#include <pmt/pmt.h>
#include <fstream>
#include <map>
#include <deque>
#include <string>
class glonass_l2_ca_dll_pll_c_aid_tracking_cc;
typedef boost::shared_ptr<glonass_l2_ca_dll_pll_c_aid_tracking_cc>
glonass_l2_ca_dll_pll_c_aid_tracking_cc_sptr;
glonass_l2_ca_dll_pll_c_aid_tracking_cc_sptr
glonass_l2_ca_dll_pll_c_aid_make_tracking_cc(long if_freq,
long fs_in, unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
int extend_correlation_ms,
float early_late_space_chips);
/*!
* \brief This class implements a DLL + PLL tracking loop block
*/
class glonass_l2_ca_dll_pll_c_aid_tracking_cc : public gr::block
{
public:
~glonass_l2_ca_dll_pll_c_aid_tracking_cc();
void set_channel(unsigned int channel);
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro);
void start_tracking();
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 forecast(int noutput_items, gr_vector_int& ninput_items_required);
private:
friend glonass_l2_ca_dll_pll_c_aid_tracking_cc_sptr
glonass_l2_ca_dll_pll_c_aid_make_tracking_cc(long if_freq,
long fs_in, unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
int extend_correlation_ms,
float early_late_space_chips);
glonass_l2_ca_dll_pll_c_aid_tracking_cc(long if_freq,
long fs_in, unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
int extend_correlation_ms,
float early_late_space_chips);
// tracking configuration vars
unsigned int d_vector_length;
bool d_dump;
Gnss_Synchro* d_acquisition_gnss_synchro;
unsigned int d_channel;
long d_if_freq;
long d_fs_in;
double d_glonass_freq_ch;
double d_early_late_spc_chips;
int d_n_correlator_taps;
gr_complex* d_ca_code;
float* d_local_code_shift_chips;
gr_complex* d_correlator_outs;
cpu_multicorrelator multicorrelator_cpu;
// remaining code phase and carrier phase between tracking loops
double d_rem_code_phase_samples;
double d_rem_code_phase_chips;
double d_rem_carrier_phase_rad;
int d_rem_code_phase_integer_samples;
// PLL and DLL filter library
//Tracking_2nd_DLL_filter d_code_loop_filter;
Tracking_2nd_DLL_filter d_code_loop_filter;
Tracking_FLL_PLL_filter d_carrier_loop_filter;
// acquisition
double d_acq_code_phase_samples;
double d_acq_carrier_doppler_hz;
// tracking vars
float d_dll_bw_hz;
float d_pll_bw_hz;
float d_dll_bw_narrow_hz;
float d_pll_bw_narrow_hz;
double d_code_freq_chips;
double d_code_phase_step_chips;
double d_carrier_doppler_hz;
double d_carrier_frequency_hz;
double d_carrier_doppler_old_hz;
double d_carrier_phase_step_rad;
double d_acc_carrier_phase_cycles;
double d_code_phase_samples;
double d_pll_to_dll_assist_secs_Ti;
double d_code_error_chips_Ti;
double d_code_error_filt_chips_s;
double d_code_error_filt_chips_Ti;
double d_carr_phase_error_secs_Ti;
// symbol history to detect bit transition
std::deque<gr_complex> d_E_history;
std::deque<gr_complex> d_P_history;
std::deque<gr_complex> d_L_history;
double d_preamble_timestamp_s;
int d_extend_correlation_ms;
bool d_enable_extended_integration;
bool d_preamble_synchronized;
void msg_handler_preamble_index(pmt::pmt_t msg);
//Integration period in samples
int d_correlation_length_samples;
//processing samples counters
unsigned long int d_sample_counter;
unsigned long int d_acq_sample_stamp;
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
gr_complex* d_Prompt_buffer;
double d_carrier_lock_test;
double d_CN0_SNV_dB_Hz;
double d_carrier_lock_threshold;
int d_carrier_lock_fail_counter;
// control vars
bool d_enable_tracking;
bool d_pull_in;
// file dump
std::string d_dump_filename;
std::ofstream d_dump_file;
std::map<std::string, std::string> systemName;
std::string sys;
int save_matfile();
};
#endif //GNSS_SDR_GLONASS_L1_CA_DLL_PLL_C_AID_TRACKING_CC_H

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/*!
* \file glonass_l2_ca_dll_pll_c_aid_tracking_sc.cc
* \brief Implementation of a code DLL + carrier PLL tracking block
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
*
* Code DLL + carrier PLL according to the algorithms described in:
* 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
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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 "glonass_l2_ca_dll_pll_c_aid_tracking_sc.h"
#include "gnss_synchro.h"
#include "glonass_l2_signal_processing.h"
#include "tracking_discriminators.h"
#include "lock_detectors.h"
#include "GLONASS_L1_L2_CA.h"
#include "gnss_sdr_flags.h"
#include "control_message_factory.h"
#include <boost/bind.hpp>
#include <boost/lexical_cast.hpp>
#include <gnuradio/io_signature.h>
#include <matio.h>
#include <pmt/pmt.h>
#include <volk_gnsssdr/volk_gnsssdr.h>
#include <glog/logging.h>
#include <cmath>
#include <iostream>
#include <memory>
#include <sstream>
#define CN0_ESTIMATION_SAMPLES 10
using google::LogMessage;
glonass_l2_ca_dll_pll_c_aid_tracking_sc_sptr
glonass_l2_ca_dll_pll_c_aid_make_tracking_sc(
long if_freq,
long fs_in,
unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
int extend_correlation_ms,
float early_late_space_chips)
{
return glonass_l2_ca_dll_pll_c_aid_tracking_sc_sptr(new glonass_l2_ca_dll_pll_c_aid_tracking_sc(if_freq,
fs_in, vector_length, dump, dump_filename, pll_bw_hz, dll_bw_hz, pll_bw_narrow_hz, dll_bw_narrow_hz, extend_correlation_ms, early_late_space_chips));
}
void glonass_l2_ca_dll_pll_c_aid_tracking_sc::forecast(int noutput_items,
gr_vector_int &ninput_items_required)
{
if (noutput_items != 0)
{
ninput_items_required[0] = static_cast<int>(d_vector_length) * 2; //set the required available samples in each call
}
}
void glonass_l2_ca_dll_pll_c_aid_tracking_sc::msg_handler_preamble_index(pmt::pmt_t msg)
{
//pmt::print(msg);
DLOG(INFO) << "Extended correlation enabled for Tracking CH " << d_channel << ": Satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN);
if (d_enable_extended_integration == false) //avoid re-setting preamble indicator
{
d_preamble_timestamp_s = pmt::to_double(msg);
d_enable_extended_integration = true;
d_preamble_synchronized = false;
}
}
glonass_l2_ca_dll_pll_c_aid_tracking_sc::glonass_l2_ca_dll_pll_c_aid_tracking_sc(
long if_freq,
long fs_in,
unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
int extend_correlation_ms,
float early_late_space_chips) : gr::block("glonass_l1_ca_dll_pll_c_aid_tracking_sc", gr::io_signature::make(1, 1, sizeof(lv_16sc_t)),
gr::io_signature::make(1, 1, sizeof(Gnss_Synchro)))
{
// Telemetry bit synchronization message port input
this->message_port_register_in(pmt::mp("preamble_timestamp_s"));
this->set_msg_handler(pmt::mp("preamble_timestamp_s"),
boost::bind(&glonass_l2_ca_dll_pll_c_aid_tracking_sc::msg_handler_preamble_index, this, _1));
this->message_port_register_out(pmt::mp("events"));
// initialize internal vars
d_dump = dump;
d_if_freq = if_freq;
d_fs_in = fs_in;
d_vector_length = vector_length;
d_dump_filename = dump_filename;
d_correlation_length_samples = static_cast<int>(d_vector_length);
// Initialize tracking ==========================================
d_pll_bw_hz = pll_bw_hz;
d_dll_bw_hz = dll_bw_hz;
d_pll_bw_narrow_hz = pll_bw_narrow_hz;
d_dll_bw_narrow_hz = dll_bw_narrow_hz;
d_code_loop_filter.set_DLL_BW(d_dll_bw_hz);
d_carrier_loop_filter.set_params(10.0, d_pll_bw_hz, 2);
d_extend_correlation_ms = extend_correlation_ms;
// --- DLL variables --------------------------------------------------------
d_early_late_spc_chips = early_late_space_chips; // Define early-late offset (in chips)
// Initialization of local code replica
// Get space for a vector with the C/A code replica sampled 1x/chip
d_ca_code = static_cast<gr_complex *>(volk_gnsssdr_malloc(static_cast<int>(GLONASS_L2_CA_CODE_LENGTH_CHIPS) * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
d_ca_code_16sc = static_cast<lv_16sc_t *>(volk_gnsssdr_malloc(static_cast<int>(GLONASS_L2_CA_CODE_LENGTH_CHIPS) * sizeof(lv_16sc_t), volk_gnsssdr_get_alignment()));
// correlator outputs (scalar)
d_n_correlator_taps = 3; // Early, Prompt, and Late
d_correlator_outs_16sc = static_cast<lv_16sc_t *>(volk_gnsssdr_malloc(d_n_correlator_taps * sizeof(lv_16sc_t), volk_gnsssdr_get_alignment()));
for (int n = 0; n < d_n_correlator_taps; n++)
{
d_correlator_outs_16sc[n] = lv_cmake(0, 0);
}
d_local_code_shift_chips = static_cast<float *>(volk_gnsssdr_malloc(d_n_correlator_taps * sizeof(float), volk_gnsssdr_get_alignment()));
// Set TAPs delay values [chips]
d_local_code_shift_chips[0] = -d_early_late_spc_chips;
d_local_code_shift_chips[1] = 0.0;
d_local_code_shift_chips[2] = d_early_late_spc_chips;
multicorrelator_cpu_16sc.init(2 * d_correlation_length_samples, d_n_correlator_taps);
//--- Perform initializations ------------------------------
// define initial code frequency basis of NCO
d_code_freq_chips = GLONASS_L2_CA_CODE_RATE_HZ;
// define residual code phase (in chips)
d_rem_code_phase_samples = 0.0;
// define residual carrier phase
d_rem_carrier_phase_rad = 0.0;
// sample synchronization
d_sample_counter = 0; //(from trk to tlm)
d_acq_sample_stamp = 0;
d_enable_tracking = false;
d_pull_in = false;
// CN0 estimation and lock detector buffers
d_cn0_estimation_counter = 0;
d_Prompt_buffer = new gr_complex[FLAGS_cn0_samples];
d_carrier_lock_test = 1;
d_CN0_SNV_dB_Hz = 0;
d_carrier_lock_fail_counter = 0;
d_carrier_lock_threshold = FLAGS_carrier_lock_th;
systemName["R"] = std::string("Glonass");
set_relative_rate(1.0 / static_cast<double>(d_vector_length));
d_acquisition_gnss_synchro = 0;
d_channel = 0;
d_acq_code_phase_samples = 0.0;
d_acq_carrier_doppler_hz = 0.0;
d_carrier_doppler_hz = 0.0;
d_acc_carrier_phase_cycles = 0.0;
d_code_phase_samples = 0.0;
d_enable_extended_integration = false;
d_preamble_synchronized = false;
d_rem_code_phase_integer_samples = 0;
d_code_error_chips_Ti = 0.0;
d_pll_to_dll_assist_secs_Ti = 0.0;
d_rem_code_phase_chips = 0.0;
d_code_phase_step_chips = 0.0;
d_carrier_phase_step_rad = 0.0;
d_code_error_filt_chips_s = 0.0;
d_code_error_filt_chips_Ti = 0.0;
d_preamble_timestamp_s = 0.0;
d_carr_phase_error_secs_Ti = 0.0;
d_carrier_frequency_hz = 0.0;
d_carrier_doppler_old_hz = 0.0;
d_glonass_freq_ch = 0;
//set_min_output_buffer((long int)300);
}
void glonass_l2_ca_dll_pll_c_aid_tracking_sc::start_tracking()
{
/*
* correct the code phase according to the delay between acq and trk
*/
d_acq_code_phase_samples = d_acquisition_gnss_synchro->Acq_delay_samples;
d_acq_carrier_doppler_hz = d_acquisition_gnss_synchro->Acq_doppler_hz;
d_acq_sample_stamp = d_acquisition_gnss_synchro->Acq_samplestamp_samples;
long int acq_trk_diff_samples;
double acq_trk_diff_seconds;
acq_trk_diff_samples = static_cast<long int>(d_sample_counter) - static_cast<long int>(d_acq_sample_stamp); //-d_vector_length;
DLOG(INFO) << "Number of samples between Acquisition and Tracking =" << acq_trk_diff_samples;
acq_trk_diff_seconds = static_cast<double>(acq_trk_diff_samples) / static_cast<double>(d_fs_in);
// Doppler effect
// Fd=(C/(C+Vr))*F
d_glonass_freq_ch = GLONASS_L2_CA_FREQ_HZ + (GLONASS_L2_CA_FREQ_HZ * GLONASS_PRN.at(d_acquisition_gnss_synchro->PRN));
double radial_velocity = (d_glonass_freq_ch + d_acq_carrier_doppler_hz) / d_glonass_freq_ch;
// new chip and prn sequence periods based on acq Doppler
double T_chip_mod_seconds;
double T_prn_mod_seconds;
double T_prn_mod_samples;
d_code_freq_chips = radial_velocity * GLONASS_L2_CA_CODE_RATE_HZ;
d_code_phase_step_chips = static_cast<double>(d_code_freq_chips) / static_cast<double>(d_fs_in);
T_chip_mod_seconds = 1.0 / d_code_freq_chips;
T_prn_mod_seconds = T_chip_mod_seconds * GLONASS_L2_CA_CODE_LENGTH_CHIPS;
T_prn_mod_samples = T_prn_mod_seconds * static_cast<double>(d_fs_in);
d_correlation_length_samples = round(T_prn_mod_samples);
double T_prn_true_seconds = GLONASS_L2_CA_CODE_LENGTH_CHIPS / GLONASS_L2_CA_CODE_RATE_HZ;
double T_prn_true_samples = T_prn_true_seconds * static_cast<double>(d_fs_in);
double T_prn_diff_seconds = T_prn_true_seconds - T_prn_mod_seconds;
double N_prn_diff = acq_trk_diff_seconds / T_prn_true_seconds;
double corrected_acq_phase_samples, delay_correction_samples;
corrected_acq_phase_samples = fmod((d_acq_code_phase_samples + T_prn_diff_seconds * N_prn_diff * static_cast<double>(d_fs_in)), T_prn_true_samples);
if (corrected_acq_phase_samples < 0)
{
corrected_acq_phase_samples = T_prn_mod_samples + corrected_acq_phase_samples;
}
delay_correction_samples = d_acq_code_phase_samples - corrected_acq_phase_samples;
d_acq_code_phase_samples = corrected_acq_phase_samples;
d_carrier_frequency_hz = d_acq_carrier_doppler_hz + d_if_freq + (DFRQ2_GLO * static_cast<double>(GLONASS_PRN.at(d_acquisition_gnss_synchro->PRN)));
;
d_carrier_doppler_hz = d_acq_carrier_doppler_hz;
d_carrier_phase_step_rad = GLONASS_TWO_PI * d_carrier_frequency_hz / static_cast<double>(d_fs_in);
// DLL/PLL filter initialization
d_carrier_loop_filter.initialize(d_carrier_frequency_hz); // The carrier loop filter implements the Doppler accumulator
d_code_loop_filter.initialize(); // initialize the code filter
// generate local reference ALWAYS starting at chip 1 (1 sample per chip)
glonass_l2_ca_code_gen_complex(d_ca_code, 0);
volk_gnsssdr_32fc_convert_16ic(d_ca_code_16sc, d_ca_code, static_cast<int>(GLONASS_L2_CA_CODE_LENGTH_CHIPS));
multicorrelator_cpu_16sc.set_local_code_and_taps(static_cast<int>(GLONASS_L2_CA_CODE_LENGTH_CHIPS), d_ca_code_16sc, d_local_code_shift_chips);
for (int n = 0; n < d_n_correlator_taps; n++)
{
d_correlator_outs_16sc[n] = lv_16sc_t(0, 0);
}
d_carrier_lock_fail_counter = 0;
d_rem_code_phase_samples = 0.0;
d_rem_carrier_phase_rad = 0.0;
d_rem_code_phase_chips = 0.0;
d_acc_carrier_phase_cycles = 0.0;
d_pll_to_dll_assist_secs_Ti = 0.0;
d_code_phase_samples = d_acq_code_phase_samples;
std::string sys_ = &d_acquisition_gnss_synchro->System;
sys = sys_.substr(0, 1);
// DEBUG OUTPUT
std::cout << "Tracking start on channel " << d_channel << " for satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN) << std::endl;
LOG(INFO) << "Starting tracking of satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN) << " on channel " << d_channel;
// enable tracking
d_pull_in = true;
d_enable_tracking = true;
d_enable_extended_integration = true;
d_preamble_synchronized = true;
LOG(INFO) << "PULL-IN Doppler [Hz]=" << d_carrier_doppler_hz
<< " Code Phase correction [samples]=" << delay_correction_samples
<< " PULL-IN Code Phase [samples]=" << d_acq_code_phase_samples;
}
int glonass_l2_ca_dll_pll_c_aid_tracking_sc::save_matfile()
{
// READ DUMP FILE
std::ifstream::pos_type size;
int number_of_double_vars = 11;
int number_of_float_vars = 5;
int epoch_size_bytes = sizeof(unsigned long int) + sizeof(double) * number_of_double_vars +
sizeof(float) * number_of_float_vars + sizeof(unsigned int);
std::ifstream dump_file;
dump_file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
try
{
dump_file.open(d_dump_filename.c_str(), std::ios::binary | std::ios::ate);
}
catch (const std::ifstream::failure &e)
{
std::cerr << "Problem opening dump file:" << e.what() << std::endl;
return 1;
}
// count number of epochs and rewind
long int num_epoch = 0;
if (dump_file.is_open())
{
size = dump_file.tellg();
num_epoch = static_cast<long int>(size) / static_cast<long int>(epoch_size_bytes);
dump_file.seekg(0, std::ios::beg);
}
else
{
return 1;
}
float *abs_E = new float[num_epoch];
float *abs_P = new float[num_epoch];
float *abs_L = new float[num_epoch];
float *Prompt_I = new float[num_epoch];
float *Prompt_Q = new float[num_epoch];
unsigned long int *PRN_start_sample_count = new unsigned long int[num_epoch];
double *acc_carrier_phase_rad = new double[num_epoch];
double *carrier_doppler_hz = new double[num_epoch];
double *code_freq_chips = new double[num_epoch];
double *carr_error_hz = new double[num_epoch];
double *carr_error_filt_hz = new double[num_epoch];
double *code_error_chips = new double[num_epoch];
double *code_error_filt_chips = new double[num_epoch];
double *CN0_SNV_dB_Hz = new double[num_epoch];
double *carrier_lock_test = new double[num_epoch];
double *aux1 = new double[num_epoch];
double *aux2 = new double[num_epoch];
unsigned int *PRN = new unsigned int[num_epoch];
try
{
if (dump_file.is_open())
{
for (long int i = 0; i < num_epoch; i++)
{
dump_file.read(reinterpret_cast<char *>(&abs_E[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&abs_P[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&abs_L[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&Prompt_I[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&Prompt_Q[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&PRN_start_sample_count[i]), sizeof(unsigned long int));
dump_file.read(reinterpret_cast<char *>(&acc_carrier_phase_rad[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carrier_doppler_hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&code_freq_chips[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carr_error_hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carr_error_filt_hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&code_error_chips[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&code_error_filt_chips[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&CN0_SNV_dB_Hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carrier_lock_test[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&aux1[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&aux2[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&PRN[i]), sizeof(unsigned int));
}
}
dump_file.close();
}
catch (const std::ifstream::failure &e)
{
std::cerr << "Problem reading dump file:" << e.what() << std::endl;
delete[] abs_E;
delete[] abs_P;
delete[] abs_L;
delete[] Prompt_I;
delete[] Prompt_Q;
delete[] PRN_start_sample_count;
delete[] acc_carrier_phase_rad;
delete[] carrier_doppler_hz;
delete[] code_freq_chips;
delete[] carr_error_hz;
delete[] carr_error_filt_hz;
delete[] code_error_chips;
delete[] code_error_filt_chips;
delete[] CN0_SNV_dB_Hz;
delete[] carrier_lock_test;
delete[] aux1;
delete[] aux2;
delete[] PRN;
return 1;
}
// WRITE MAT FILE
mat_t *matfp;
matvar_t *matvar;
std::string filename = d_dump_filename;
filename.erase(filename.length() - 4, 4);
filename.append(".mat");
matfp = Mat_CreateVer(filename.c_str(), NULL, MAT_FT_MAT73);
if (reinterpret_cast<long *>(matfp) != NULL)
{
size_t dims[2] = {1, static_cast<size_t>(num_epoch)};
matvar = Mat_VarCreate("abs_E", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, abs_E, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("abs_P", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, abs_P, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("abs_L", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, abs_L, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("Prompt_I", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, Prompt_I, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("Prompt_Q", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, Prompt_Q, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("PRN_start_sample_count", MAT_C_UINT64, MAT_T_UINT64, 2, dims, PRN_start_sample_count, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("acc_carrier_phase_rad", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, acc_carrier_phase_rad, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carrier_doppler_hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carrier_doppler_hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("code_freq_chips", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, code_freq_chips, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carr_error_hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carr_error_hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carr_error_filt_hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carr_error_filt_hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("code_error_chips", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, code_error_chips, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("code_error_filt_chips", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, code_error_filt_chips, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("CN0_SNV_dB_Hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, CN0_SNV_dB_Hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carrier_lock_test", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carrier_lock_test, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("aux1", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, aux1, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("aux2", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, aux2, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("PRN", MAT_C_UINT32, MAT_T_UINT32, 2, dims, PRN, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
}
Mat_Close(matfp);
delete[] abs_E;
delete[] abs_P;
delete[] abs_L;
delete[] Prompt_I;
delete[] Prompt_Q;
delete[] PRN_start_sample_count;
delete[] acc_carrier_phase_rad;
delete[] carrier_doppler_hz;
delete[] code_freq_chips;
delete[] carr_error_hz;
delete[] carr_error_filt_hz;
delete[] code_error_chips;
delete[] code_error_filt_chips;
delete[] CN0_SNV_dB_Hz;
delete[] carrier_lock_test;
delete[] aux1;
delete[] aux2;
delete[] PRN;
return 0;
}
glonass_l2_ca_dll_pll_c_aid_tracking_sc::~glonass_l2_ca_dll_pll_c_aid_tracking_sc()
{
if (d_dump_file.is_open())
{
try
{
d_dump_file.close();
}
catch (const std::exception &ex)
{
LOG(WARNING) << "Exception in destructor " << ex.what();
}
}
if (d_dump)
{
if (d_channel == 0)
{
std::cout << "Writing .mat files ...";
}
glonass_l2_ca_dll_pll_c_aid_tracking_sc::save_matfile();
if (d_channel == 0)
{
std::cout << " done." << std::endl;
}
}
volk_gnsssdr_free(d_local_code_shift_chips);
volk_gnsssdr_free(d_ca_code);
volk_gnsssdr_free(d_ca_code_16sc);
volk_gnsssdr_free(d_correlator_outs_16sc);
delete[] d_Prompt_buffer;
multicorrelator_cpu_16sc.free();
}
int glonass_l2_ca_dll_pll_c_aid_tracking_sc::general_work(int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
{
// Block input data and block output stream pointers
const lv_16sc_t *in = reinterpret_cast<const lv_16sc_t *>(input_items[0]); // PRN start block alignment
Gnss_Synchro **out = reinterpret_cast<Gnss_Synchro **>(&output_items[0]);
// GNSS_SYNCHRO OBJECT to interchange data between tracking->telemetry_decoder
Gnss_Synchro current_synchro_data = Gnss_Synchro();
// process vars
double code_error_filt_secs_Ti = 0.0;
double CURRENT_INTEGRATION_TIME_S = 0.0;
double CORRECTED_INTEGRATION_TIME_S = 0.0;
if (d_enable_tracking == true)
{
// Fill the acquisition data
current_synchro_data = *d_acquisition_gnss_synchro;
// Receiver signal alignment
if (d_pull_in == true)
{
int samples_offset;
double acq_trk_shif_correction_samples;
int acq_to_trk_delay_samples;
acq_to_trk_delay_samples = d_sample_counter - d_acq_sample_stamp;
acq_trk_shif_correction_samples = d_correlation_length_samples - fmod(static_cast<double>(acq_to_trk_delay_samples), static_cast<double>(d_correlation_length_samples));
samples_offset = round(d_acq_code_phase_samples + acq_trk_shif_correction_samples);
current_synchro_data.Tracking_sample_counter = d_sample_counter + samples_offset;
d_sample_counter += samples_offset; // count for the processed samples
d_pull_in = false;
d_acc_carrier_phase_cycles -= d_carrier_phase_step_rad * samples_offset / GLONASS_TWO_PI;
current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_cycles * GLONASS_TWO_PI;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.fs = d_fs_in;
*out[0] = current_synchro_data;
consume_each(samples_offset); // shift input to perform alignment with local replica
return 1;
}
// ################# CARRIER WIPEOFF AND CORRELATORS ##############################
// perform carrier wipe-off and compute Early, Prompt and Late correlation
multicorrelator_cpu_16sc.set_input_output_vectors(d_correlator_outs_16sc, in);
multicorrelator_cpu_16sc.Carrier_wipeoff_multicorrelator_resampler(d_rem_carrier_phase_rad,
d_carrier_phase_step_rad,
d_rem_code_phase_chips,
d_code_phase_step_chips,
d_correlation_length_samples);
// ####### coherent intergration extension
// keep the last symbols
d_E_history.push_back(d_correlator_outs_16sc[0]); // save early output
d_P_history.push_back(d_correlator_outs_16sc[1]); // save prompt output
d_L_history.push_back(d_correlator_outs_16sc[2]); // save late output
if (static_cast<int>(d_P_history.size()) > d_extend_correlation_ms)
{
d_E_history.pop_front();
d_P_history.pop_front();
d_L_history.pop_front();
}
bool enable_dll_pll;
if (d_enable_extended_integration == true)
{
long int symbol_diff = round(1000.0 * ((static_cast<double>(d_sample_counter) + d_rem_code_phase_samples) / static_cast<double>(d_fs_in) - d_preamble_timestamp_s));
if (symbol_diff > 0 and symbol_diff % d_extend_correlation_ms == 0)
{
// compute coherent integration and enable tracking loop
// perform coherent integration using correlator output history
// std::cout<<"##### RESET COHERENT INTEGRATION ####"<<std::endl;
d_correlator_outs_16sc[0] = lv_cmake(0, 0);
d_correlator_outs_16sc[1] = lv_cmake(0, 0);
d_correlator_outs_16sc[2] = lv_cmake(0, 0);
for (int n = 0; n < d_extend_correlation_ms; n++)
{
d_correlator_outs_16sc[0] += d_E_history.at(n);
d_correlator_outs_16sc[1] += d_P_history.at(n);
d_correlator_outs_16sc[2] += d_L_history.at(n);
}
if (d_preamble_synchronized == false)
{
d_code_loop_filter.set_DLL_BW(d_dll_bw_narrow_hz);
d_carrier_loop_filter.set_params(10.0, d_pll_bw_narrow_hz, 2);
d_preamble_synchronized = true;
std::cout << "Enabled " << d_extend_correlation_ms << " [ms] extended correlator for CH " << d_channel << " : Satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN)
<< " pll_bw = " << d_pll_bw_hz << " [Hz], pll_narrow_bw = " << d_pll_bw_narrow_hz << " [Hz]" << std::endl
<< " dll_bw = " << d_dll_bw_hz << " [Hz], dll_narrow_bw = " << d_dll_bw_narrow_hz << " [Hz]" << std::endl;
}
// UPDATE INTEGRATION TIME
CURRENT_INTEGRATION_TIME_S = static_cast<double>(d_extend_correlation_ms) * GLONASS_L2_CA_CODE_PERIOD;
enable_dll_pll = true;
}
else
{
if (d_preamble_synchronized == true)
{
// continue extended coherent correlation
// Compute the next buffer length based on the period of the PRN sequence and the code phase error estimation
double T_chip_seconds = 1.0 / d_code_freq_chips;
double T_prn_seconds = T_chip_seconds * GLONASS_L2_CA_CODE_LENGTH_CHIPS;
double T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
int K_prn_samples = round(T_prn_samples);
double K_T_prn_error_samples = K_prn_samples - T_prn_samples;
d_rem_code_phase_samples = d_rem_code_phase_samples - K_T_prn_error_samples;
d_rem_code_phase_integer_samples = round(d_rem_code_phase_samples); // round to a discrete number of samples
d_correlation_length_samples = K_prn_samples + d_rem_code_phase_integer_samples;
d_rem_code_phase_samples = d_rem_code_phase_samples - d_rem_code_phase_integer_samples;
// code phase step (Code resampler phase increment per sample) [chips/sample]
d_code_phase_step_chips = d_code_freq_chips / static_cast<double>(d_fs_in);
// remnant code phase [chips]
d_rem_code_phase_chips = d_rem_code_phase_samples * (d_code_freq_chips / static_cast<double>(d_fs_in));
d_rem_carrier_phase_rad = fmod(d_rem_carrier_phase_rad + d_carrier_phase_step_rad * static_cast<double>(d_correlation_length_samples), GLONASS_TWO_PI);
// UPDATE ACCUMULATED CARRIER PHASE
CORRECTED_INTEGRATION_TIME_S = (static_cast<double>(d_correlation_length_samples) / static_cast<double>(d_fs_in));
d_acc_carrier_phase_cycles -= d_carrier_phase_step_rad * d_correlation_length_samples / GLONASS_TWO_PI;
// disable tracking loop and inform telemetry decoder
enable_dll_pll = false;
}
else
{
// perform basic (1ms) correlation
// UPDATE INTEGRATION TIME
CURRENT_INTEGRATION_TIME_S = static_cast<double>(d_correlation_length_samples) / static_cast<double>(d_fs_in);
enable_dll_pll = true;
}
}
}
else
{
// UPDATE INTEGRATION TIME
CURRENT_INTEGRATION_TIME_S = static_cast<double>(d_correlation_length_samples) / static_cast<double>(d_fs_in);
enable_dll_pll = true;
}
if (enable_dll_pll == true)
{
// ################## PLL ##########################################################
// Update PLL discriminator [rads/Ti -> Secs/Ti]
d_carr_phase_error_secs_Ti = pll_cloop_two_quadrant_atan(std::complex<float>(d_correlator_outs_16sc[1].real(), d_correlator_outs_16sc[1].imag())) / GLONASS_TWO_PI; //prompt output
d_carrier_doppler_old_hz = d_carrier_doppler_hz;
// Carrier discriminator filter
// NOTICE: The carrier loop filter includes the Carrier Doppler accumulator, as described in Kaplan
// Input [s/Ti] -> output [Hz]
d_carrier_doppler_hz = d_carrier_loop_filter.get_carrier_error(0.0, d_carr_phase_error_secs_Ti, CURRENT_INTEGRATION_TIME_S);
// PLL to DLL assistance [Secs/Ti]
d_pll_to_dll_assist_secs_Ti = (d_carrier_doppler_hz * CURRENT_INTEGRATION_TIME_S) / d_glonass_freq_ch;
// code Doppler frequency update
d_code_freq_chips = GLONASS_L2_CA_CODE_RATE_HZ + (((d_carrier_doppler_hz - d_carrier_doppler_old_hz) * GLONASS_L2_CA_CODE_RATE_HZ) / d_glonass_freq_ch);
// ################## DLL ##########################################################
// DLL discriminator
d_code_error_chips_Ti = dll_nc_e_minus_l_normalized(std::complex<float>(d_correlator_outs_16sc[0].real(), d_correlator_outs_16sc[0].imag()), std::complex<float>(d_correlator_outs_16sc[2].real(), d_correlator_outs_16sc[2].imag())); // [chips/Ti] //early and late
// Code discriminator filter
d_code_error_filt_chips_s = d_code_loop_filter.get_code_nco(d_code_error_chips_Ti); // input [chips/Ti] -> output [chips/second]
d_code_error_filt_chips_Ti = d_code_error_filt_chips_s * CURRENT_INTEGRATION_TIME_S;
code_error_filt_secs_Ti = d_code_error_filt_chips_Ti / d_code_freq_chips; // [s/Ti]
// ################## CARRIER AND CODE NCO BUFFER ALIGNEMENT #######################
// keep alignment parameters for the next input buffer
// Compute the next buffer length based in the new period of the PRN sequence and the code phase error estimation
double T_chip_seconds = 1.0 / d_code_freq_chips;
double T_prn_seconds = T_chip_seconds * GLONASS_L2_CA_CODE_LENGTH_CHIPS;
double T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
double K_prn_samples = round(T_prn_samples);
double K_T_prn_error_samples = K_prn_samples - T_prn_samples;
d_rem_code_phase_samples = d_rem_code_phase_samples - K_T_prn_error_samples + code_error_filt_secs_Ti * static_cast<double>(d_fs_in); //(code_error_filt_secs_Ti + d_pll_to_dll_assist_secs_Ti) * static_cast<double>(d_fs_in);
d_rem_code_phase_integer_samples = round(d_rem_code_phase_samples); // round to a discrete number of samples
d_correlation_length_samples = K_prn_samples + d_rem_code_phase_integer_samples;
d_rem_code_phase_samples = d_rem_code_phase_samples - d_rem_code_phase_integer_samples;
//################### PLL COMMANDS #################################################
//carrier phase step (NCO phase increment per sample) [rads/sample]
d_carrier_phase_step_rad = GLONASS_TWO_PI * d_carrier_doppler_hz / static_cast<double>(d_fs_in);
d_acc_carrier_phase_cycles -= d_carrier_phase_step_rad * d_correlation_length_samples / GLONASS_TWO_PI;
// UPDATE ACCUMULATED CARRIER PHASE
CORRECTED_INTEGRATION_TIME_S = (static_cast<double>(d_correlation_length_samples) / static_cast<double>(d_fs_in));
//remnant carrier phase [rad]
d_rem_carrier_phase_rad = fmod(d_rem_carrier_phase_rad + GLONASS_TWO_PI * d_carrier_doppler_hz * CORRECTED_INTEGRATION_TIME_S, GLONASS_TWO_PI);
//################### DLL COMMANDS #################################################
//code phase step (Code resampler phase increment per sample) [chips/sample]
d_code_phase_step_chips = d_code_freq_chips / static_cast<double>(d_fs_in);
//remnant code phase [chips]
d_rem_code_phase_chips = d_rem_code_phase_samples * (d_code_freq_chips / static_cast<double>(d_fs_in));
// ####### CN0 ESTIMATION AND LOCK DETECTORS #######################################
if (d_cn0_estimation_counter < CN0_ESTIMATION_SAMPLES )
{
// fill buffer with prompt correlator output values
d_Prompt_buffer[d_cn0_estimation_counter] = lv_cmake(static_cast<float>(d_correlator_outs_16sc[1].real()), static_cast<float>(d_correlator_outs_16sc[1].imag())); // prompt
d_cn0_estimation_counter++;
}
else
{
d_cn0_estimation_counter = 0;
// Code lock indicator
d_CN0_SNV_dB_Hz = cn0_svn_estimator(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES, d_fs_in, GLONASS_L2_CA_CODE_LENGTH_CHIPS);
// Carrier lock indicator
d_carrier_lock_test = carrier_lock_detector(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES);
// Loss of lock detection
if (d_carrier_lock_test < d_carrier_lock_threshold or d_CN0_SNV_dB_Hz < FLAGS_cn0_min)
{
d_carrier_lock_fail_counter++;
}
else
{
if (d_carrier_lock_fail_counter > 0) d_carrier_lock_fail_counter--;
}
if (d_carrier_lock_fail_counter > FLAGS_max_lock_fail)
{
std::cout << "Loss of lock in channel " << d_channel << "!" << std::endl;
LOG(INFO) << "Loss of lock in channel " << d_channel << "!";
this->message_port_pub(pmt::mp("events"), pmt::from_long(3)); //3 -> loss of lock
d_carrier_lock_fail_counter = 0;
d_enable_tracking = false; // TODO: check if disabling tracking is consistent with the channel state machine
}
}
// ########### Output the tracking data to navigation and PVT ##########
current_synchro_data.Prompt_I = static_cast<double>((d_correlator_outs_16sc[1]).real());
current_synchro_data.Prompt_Q = static_cast<double>((d_correlator_outs_16sc[1]).imag());
// Tracking_timestamp_secs is aligned with the CURRENT PRN start sample (Hybridization OK!)
current_synchro_data.Tracking_sample_counter = d_sample_counter + d_correlation_length_samples;
current_synchro_data.Code_phase_samples = d_rem_code_phase_samples;
current_synchro_data.Carrier_phase_rads = GLONASS_TWO_PI * d_acc_carrier_phase_cycles;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
current_synchro_data.Flag_valid_symbol_output = true;
if (d_preamble_synchronized == true)
{
current_synchro_data.correlation_length_ms = d_extend_correlation_ms;
}
else
{
current_synchro_data.correlation_length_ms = 1;
}
}
else
{
current_synchro_data.Prompt_I = static_cast<double>((d_correlator_outs_16sc[1]).real());
current_synchro_data.Prompt_Q = static_cast<double>((d_correlator_outs_16sc[1]).imag());
current_synchro_data.Tracking_sample_counter = d_sample_counter + d_correlation_length_samples;
current_synchro_data.Code_phase_samples = d_rem_code_phase_samples;
current_synchro_data.Carrier_phase_rads = GLONASS_TWO_PI * d_acc_carrier_phase_cycles;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz; // todo: project the carrier doppler
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
}
}
else
{
for (int n = 0; n < d_n_correlator_taps; n++)
{
d_correlator_outs_16sc[n] = lv_cmake(0, 0);
}
current_synchro_data.System = {'R'};
current_synchro_data.Tracking_sample_counter = d_sample_counter + d_correlation_length_samples;
}
current_synchro_data.fs = d_fs_in;
*out[0] = current_synchro_data;
if (d_dump)
{
// MULTIPLEXED FILE RECORDING - Record results to file
float prompt_I;
float prompt_Q;
float tmp_E, tmp_P, tmp_L;
double tmp_double;
prompt_I = d_correlator_outs_16sc[1].real();
prompt_Q = d_correlator_outs_16sc[1].imag();
tmp_E = std::abs<float>(std::complex<float>(d_correlator_outs_16sc[0].real(), d_correlator_outs_16sc[0].imag()));
tmp_P = std::abs<float>(std::complex<float>(d_correlator_outs_16sc[1].real(), d_correlator_outs_16sc[1].imag()));
tmp_L = std::abs<float>(std::complex<float>(d_correlator_outs_16sc[2].real(), d_correlator_outs_16sc[2].imag()));
try
{
// EPR
d_dump_file.write(reinterpret_cast<char *>(&tmp_E), sizeof(float));
d_dump_file.write(reinterpret_cast<char *>(&tmp_P), sizeof(float));
d_dump_file.write(reinterpret_cast<char *>(&tmp_L), sizeof(float));
// PROMPT I and Q (to analyze navigation symbols)
d_dump_file.write(reinterpret_cast<char *>(&prompt_I), sizeof(float));
d_dump_file.write(reinterpret_cast<char *>(&prompt_Q), sizeof(float));
// PRN start sample stamp
//tmp_float=(float)d_sample_counter;
d_dump_file.write(reinterpret_cast<char *>(&d_sample_counter), sizeof(unsigned long int));
// accumulated carrier phase
d_dump_file.write(reinterpret_cast<char *>(&d_acc_carrier_phase_cycles), sizeof(double));
// carrier and code frequency
d_dump_file.write(reinterpret_cast<char *>(&d_carrier_doppler_hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&d_code_freq_chips), sizeof(double));
//PLL commands
d_dump_file.write(reinterpret_cast<char *>(&d_carr_phase_error_secs_Ti), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&d_carrier_doppler_hz), sizeof(double));
//DLL commands
d_dump_file.write(reinterpret_cast<char *>(&d_code_error_chips_Ti), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&d_code_error_filt_chips_Ti), sizeof(double));
// CN0 and carrier lock test
d_dump_file.write(reinterpret_cast<char *>(&d_CN0_SNV_dB_Hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&d_carrier_lock_test), sizeof(double));
// AUX vars (for debug purposes)
tmp_double = d_code_error_chips_Ti * CURRENT_INTEGRATION_TIME_S;
d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double));
tmp_double = static_cast<double>(d_sample_counter + d_correlation_length_samples);
d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double));
// PRN
unsigned int prn_ = d_acquisition_gnss_synchro->PRN;
d_dump_file.write(reinterpret_cast<char *>(&prn_), sizeof(unsigned int));
}
catch (const std::ifstream::failure *e)
{
LOG(WARNING) << "Exception writing trk dump file " << e->what();
}
}
consume_each(d_correlation_length_samples); // this is necessary in gr::block derivates
d_sample_counter += d_correlation_length_samples; //count for the processed samples
return 1; //output tracking result ALWAYS even in the case of d_enable_tracking==false
}
void glonass_l2_ca_dll_pll_c_aid_tracking_sc::set_channel(unsigned int channel)
{
d_channel = channel;
LOG(INFO) << "Tracking Channel set to " << d_channel;
// ############# ENABLE DATA FILE LOG #################
if (d_dump == true)
{
if (d_dump_file.is_open() == false)
{
try
{
d_dump_filename.append(boost::lexical_cast<std::string>(d_channel));
d_dump_filename.append(".dat");
d_dump_file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
d_dump_file.open(d_dump_filename.c_str(), std::ios::out | std::ios::binary);
LOG(INFO) << "Tracking dump enabled on channel " << d_channel << " Log file: " << d_dump_filename.c_str() << std::endl;
}
catch (const std::ifstream::failure *e)
{
LOG(WARNING) << "channel " << d_channel << " Exception opening trk dump file " << e->what() << std::endl;
}
}
}
}
void glonass_l2_ca_dll_pll_c_aid_tracking_sc::set_gnss_synchro(Gnss_Synchro *p_gnss_synchro)
{
d_acquisition_gnss_synchro = p_gnss_synchro;
}

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/*!
* \file glonass_l2_ca_dll_pll_c_aid_tracking_sc.h
* \brief Implementation of a code DLL + carrier PLL tracking block
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
*
* Code DLL + carrier PLL according to the algorithms described in:
* 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
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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_GLONASS_L2_CA_DLL_PLL_C_AID_TRACKING_SC_H
#define GNSS_SDR_GLONASS_L2_CA_DLL_PLL_C_AID_TRACKING_SC_H
#include "glonass_l2_signal_processing.h"
#include "gnss_synchro.h"
#include "tracking_2nd_DLL_filter.h"
#include "tracking_FLL_PLL_filter.h"
#include "cpu_multicorrelator_16sc.h"
#include <boost/thread/mutex.hpp>
#include <boost/thread/thread.hpp>
#include <gnuradio/block.h>
#include <volk/volk.h>
#include <fstream>
#include <map>
#include <string>
class glonass_l2_ca_dll_pll_c_aid_tracking_sc;
typedef boost::shared_ptr<glonass_l2_ca_dll_pll_c_aid_tracking_sc>
glonass_l2_ca_dll_pll_c_aid_tracking_sc_sptr;
glonass_l2_ca_dll_pll_c_aid_tracking_sc_sptr
glonass_l2_ca_dll_pll_c_aid_make_tracking_sc(long if_freq,
long fs_in, unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
int extend_correlation_ms,
float early_late_space_chips);
/*!
* \brief This class implements a DLL + PLL tracking loop block
*/
class glonass_l2_ca_dll_pll_c_aid_tracking_sc : public gr::block
{
public:
~glonass_l2_ca_dll_pll_c_aid_tracking_sc();
void set_channel(unsigned int channel);
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro);
void start_tracking();
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 forecast(int noutput_items, gr_vector_int& ninput_items_required);
private:
friend glonass_l2_ca_dll_pll_c_aid_tracking_sc_sptr
glonass_l2_ca_dll_pll_c_aid_make_tracking_sc(long if_freq,
long fs_in, unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
int extend_correlation_ms,
float early_late_space_chips);
glonass_l2_ca_dll_pll_c_aid_tracking_sc(long if_freq,
long fs_in, unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
int extend_correlation_ms,
float early_late_space_chips);
// tracking configuration vars
unsigned int d_vector_length;
bool d_dump;
Gnss_Synchro* d_acquisition_gnss_synchro;
unsigned int d_channel;
long d_if_freq;
long d_fs_in;
long d_glonass_freq_ch;
double d_early_late_spc_chips;
int d_n_correlator_taps;
gr_complex* d_ca_code;
lv_16sc_t* d_ca_code_16sc;
float* d_local_code_shift_chips;
//gr_complex* d_correlator_outs;
lv_16sc_t* d_correlator_outs_16sc;
//cpu_multicorrelator multicorrelator_cpu;
cpu_multicorrelator_16sc multicorrelator_cpu_16sc;
// remaining code phase and carrier phase between tracking loops
double d_rem_code_phase_samples;
double d_rem_code_phase_chips;
double d_rem_carrier_phase_rad;
int d_rem_code_phase_integer_samples;
// PLL and DLL filter library
Tracking_2nd_DLL_filter d_code_loop_filter;
Tracking_FLL_PLL_filter d_carrier_loop_filter;
// acquisition
double d_acq_code_phase_samples;
double d_acq_carrier_doppler_hz;
// tracking vars
float d_dll_bw_hz;
float d_pll_bw_hz;
float d_dll_bw_narrow_hz;
float d_pll_bw_narrow_hz;
double d_code_freq_chips;
double d_code_phase_step_chips;
double d_carrier_doppler_hz;
double d_carrier_frequency_hz;
double d_carrier_doppler_old_hz;
double d_carrier_phase_step_rad;
double d_acc_carrier_phase_cycles;
double d_code_phase_samples;
double d_pll_to_dll_assist_secs_Ti;
double d_carr_phase_error_secs_Ti;
double d_code_error_chips_Ti;
double d_preamble_timestamp_s;
int d_extend_correlation_ms;
bool d_enable_extended_integration;
bool d_preamble_synchronized;
double d_code_error_filt_chips_s;
double d_code_error_filt_chips_Ti;
void msg_handler_preamble_index(pmt::pmt_t msg);
// symbol history to detect bit transition
std::deque<lv_16sc_t> d_E_history;
std::deque<lv_16sc_t> d_P_history;
std::deque<lv_16sc_t> d_L_history;
//Integration period in samples
int d_correlation_length_samples;
//processing samples counters
unsigned long int d_sample_counter;
unsigned long int d_acq_sample_stamp;
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
gr_complex* d_Prompt_buffer;
double d_carrier_lock_test;
double d_CN0_SNV_dB_Hz;
double d_carrier_lock_threshold;
int d_carrier_lock_fail_counter;
// control vars
bool d_enable_tracking;
bool d_pull_in;
// file dump
std::string d_dump_filename;
std::ofstream d_dump_file;
std::map<std::string, std::string> systemName;
std::string sys;
int save_matfile();
};
#endif //GNSS_SDR_GLONASS_L2_CA_DLL_PLL_C_AID_TRACKING_SC_H

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/*!
* \file glonass_l2_ca_dll_pll_tracking_cc.cc
* \brief Implementation of a code DLL + carrier PLL tracking block
* \author Gabriel Araujo, 2017. gabriel.araujo.5000(at)gmail.com
* \author Luis Esteve, 2017. luis(at)epsilon-formacion.com
* \author Damian Miralles, 2017. dmiralles2009(at)gmail.com
*
*
* Code DLL + carrier PLL according to the algorithms described in:
* 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
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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 "glonass_l2_ca_dll_pll_tracking_cc.h"
#include "glonass_l2_signal_processing.h"
#include "tracking_discriminators.h"
#include "lock_detectors.h"
#include "GLONASS_L1_L2_CA.h"
#include "gnss_sdr_flags.h"
#include "control_message_factory.h"
#include <boost/lexical_cast.hpp>
#include <gnuradio/io_signature.h>
#include <glog/logging.h>
#include <matio.h>
#include <volk_gnsssdr/volk_gnsssdr.h>
#include <cmath>
#include <iostream>
#include <memory>
#include <sstream>
#define CN0_ESTIMATION_SAMPLES 10
using google::LogMessage;
glonass_l2_ca_dll_pll_tracking_cc_sptr
glonass_l2_ca_dll_pll_make_tracking_cc(
long if_freq,
long fs_in,
unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float early_late_space_chips)
{
return glonass_l2_ca_dll_pll_tracking_cc_sptr(new Glonass_L2_Ca_Dll_Pll_Tracking_cc(if_freq,
fs_in, vector_length, dump, dump_filename, pll_bw_hz, dll_bw_hz, early_late_space_chips));
}
void Glonass_L2_Ca_Dll_Pll_Tracking_cc::forecast(int noutput_items,
gr_vector_int &ninput_items_required)
{
if (noutput_items != 0)
{
ninput_items_required[0] = static_cast<int>(d_vector_length) * 2; //set the required available samples in each call
}
}
Glonass_L2_Ca_Dll_Pll_Tracking_cc::Glonass_L2_Ca_Dll_Pll_Tracking_cc(
long if_freq,
long fs_in,
unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float early_late_space_chips) : gr::block("Glonass_L2_Ca_Dll_Pll_Tracking_cc", gr::io_signature::make(1, 1, sizeof(gr_complex)),
gr::io_signature::make(1, 1, sizeof(Gnss_Synchro)))
{
// Telemetry bit synchronization message port input
this->message_port_register_in(pmt::mp("preamble_timestamp_s"));
this->message_port_register_out(pmt::mp("events"));
// initialize internal vars
d_dump = dump;
d_if_freq = if_freq;
d_fs_in = fs_in;
d_vector_length = vector_length;
d_dump_filename = dump_filename;
d_current_prn_length_samples = static_cast<int>(d_vector_length);
// Initialize tracking ==========================================
d_code_loop_filter.set_DLL_BW(dll_bw_hz);
d_carrier_loop_filter.set_PLL_BW(pll_bw_hz);
//--- DLL variables --------------------------------------------------------
d_early_late_spc_chips = early_late_space_chips; // Define early-late offset (in chips)
// Initialization of local code replica
// Get space for a vector with the C/A code replica sampled 1x/chip
d_ca_code = static_cast<gr_complex *>(volk_gnsssdr_malloc(static_cast<int>(GLONASS_L2_CA_CODE_LENGTH_CHIPS) * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
// correlator outputs (scalar)
d_n_correlator_taps = 3; // Early, Prompt, and Late
d_correlator_outs = static_cast<gr_complex *>(volk_gnsssdr_malloc(d_n_correlator_taps * sizeof(gr_complex), volk_gnsssdr_get_alignment()));
for (int n = 0; n < d_n_correlator_taps; n++)
{
d_correlator_outs[n] = gr_complex(0, 0);
}
d_local_code_shift_chips = static_cast<float *>(volk_gnsssdr_malloc(d_n_correlator_taps * sizeof(float), volk_gnsssdr_get_alignment()));
// Set TAPs delay values [chips]
d_local_code_shift_chips[0] = -d_early_late_spc_chips;
d_local_code_shift_chips[1] = 0.0;
d_local_code_shift_chips[2] = d_early_late_spc_chips;
multicorrelator_cpu.init(2 * d_current_prn_length_samples, d_n_correlator_taps);
//--- Perform initializations ------------------------------
// define initial code frequency basis of NCO
d_code_freq_chips = GLONASS_L2_CA_CODE_RATE_HZ;
// define residual code phase (in chips)
d_rem_code_phase_samples = 0.0;
// define residual carrier phase
d_rem_carr_phase_rad = 0.0;
// sample synchronization
d_sample_counter = 0;
//d_sample_counter_seconds = 0;
d_acq_sample_stamp = 0;
d_enable_tracking = false;
d_pull_in = false;
// CN0 estimation and lock detector buffers
d_cn0_estimation_counter = 0;
d_Prompt_buffer = new gr_complex[FLAGS_cn0_samples];
d_carrier_lock_test = 1;
d_CN0_SNV_dB_Hz = 0;
d_carrier_lock_fail_counter = 0;
d_carrier_lock_threshold = FLAGS_carrier_lock_th;
systemName["R"] = std::string("Glonass");
d_acquisition_gnss_synchro = 0;
d_channel = 0;
d_acq_code_phase_samples = 0.0;
d_acq_carrier_doppler_hz = 0.0;
d_carrier_doppler_hz = 0.0;
d_carrier_doppler_phase_step_rad = 0.0;
d_carrier_frequency_hz = 0.0;
d_acc_carrier_phase_rad = 0.0;
d_code_phase_samples = 0.0;
d_rem_code_phase_chips = 0.0;
d_code_phase_step_chips = 0.0;
d_carrier_phase_step_rad = 0.0;
d_glonass_freq_ch = 0;
set_relative_rate(1.0 / static_cast<double>(d_vector_length));
}
void Glonass_L2_Ca_Dll_Pll_Tracking_cc::start_tracking()
{
/*
* correct the code phase according to the delay between acq and trk
*/
d_acq_code_phase_samples = d_acquisition_gnss_synchro->Acq_delay_samples;
d_acq_carrier_doppler_hz = d_acquisition_gnss_synchro->Acq_doppler_hz;
d_acq_sample_stamp = d_acquisition_gnss_synchro->Acq_samplestamp_samples;
long int acq_trk_diff_samples;
double acq_trk_diff_seconds;
acq_trk_diff_samples = static_cast<long int>(d_sample_counter) - static_cast<long int>(d_acq_sample_stamp); //-d_vector_length;
DLOG(INFO) << "Number of samples between Acquisition and Tracking =" << acq_trk_diff_samples;
acq_trk_diff_seconds = static_cast<float>(acq_trk_diff_samples) / static_cast<float>(d_fs_in);
// Doppler effect
// Fd=(C/(C+Vr))*F
d_glonass_freq_ch = GLONASS_L2_CA_FREQ_HZ + (DFRQ2_GLO * GLONASS_PRN.at(d_acquisition_gnss_synchro->PRN));
double radial_velocity = (d_glonass_freq_ch + d_acq_carrier_doppler_hz) / d_glonass_freq_ch;
// new chip and prn sequence periods based on acq Doppler
double T_chip_mod_seconds;
double T_prn_mod_seconds;
double T_prn_mod_samples;
d_code_freq_chips = radial_velocity * GLONASS_L2_CA_CODE_RATE_HZ;
d_code_phase_step_chips = static_cast<double>(d_code_freq_chips) / static_cast<double>(d_fs_in);
T_chip_mod_seconds = 1 / d_code_freq_chips;
T_prn_mod_seconds = T_chip_mod_seconds * GLONASS_L2_CA_CODE_LENGTH_CHIPS;
T_prn_mod_samples = T_prn_mod_seconds * static_cast<double>(d_fs_in);
d_current_prn_length_samples = round(T_prn_mod_samples);
double T_prn_true_seconds = GLONASS_L2_CA_CODE_LENGTH_CHIPS / GLONASS_L2_CA_CODE_RATE_HZ;
double T_prn_true_samples = T_prn_true_seconds * static_cast<double>(d_fs_in);
double T_prn_diff_seconds = T_prn_true_seconds - T_prn_mod_seconds;
double N_prn_diff = acq_trk_diff_seconds / T_prn_true_seconds;
double corrected_acq_phase_samples, delay_correction_samples;
corrected_acq_phase_samples = fmod((d_acq_code_phase_samples + T_prn_diff_seconds * N_prn_diff * static_cast<double>(d_fs_in)), T_prn_true_samples);
if (corrected_acq_phase_samples < 0)
{
corrected_acq_phase_samples = T_prn_mod_samples + corrected_acq_phase_samples;
}
delay_correction_samples = d_acq_code_phase_samples - corrected_acq_phase_samples;
d_acq_code_phase_samples = corrected_acq_phase_samples;
d_carrier_frequency_hz = d_acq_carrier_doppler_hz + d_if_freq + (DFRQ2_GLO * GLONASS_PRN.at(d_acquisition_gnss_synchro->PRN));
d_carrier_doppler_hz = d_acq_carrier_doppler_hz;
d_carrier_phase_step_rad = GLONASS_TWO_PI * d_carrier_frequency_hz / static_cast<double>(d_fs_in);
d_carrier_doppler_phase_step_rad = GLONASS_TWO_PI * (d_carrier_doppler_hz) / static_cast<double>(d_fs_in);
// DLL/PLL filter initialization
d_carrier_loop_filter.initialize(); // initialize the carrier filter
d_code_loop_filter.initialize(); // initialize the code filter
// generate local reference ALWAYS starting at chip 1 (1 sample per chip)
glonass_l2_ca_code_gen_complex(d_ca_code, 0);
multicorrelator_cpu.set_local_code_and_taps(static_cast<int>(GLONASS_L2_CA_CODE_LENGTH_CHIPS), d_ca_code, d_local_code_shift_chips);
for (int n = 0; n < d_n_correlator_taps; n++)
{
d_correlator_outs[n] = gr_complex(0, 0);
}
d_carrier_lock_fail_counter = 0;
d_rem_code_phase_samples = 0;
d_rem_carr_phase_rad = 0.0;
d_rem_code_phase_chips = 0.0;
d_acc_carrier_phase_rad = 0.0;
d_code_phase_samples = d_acq_code_phase_samples;
std::string sys_ = &d_acquisition_gnss_synchro->System;
sys = sys_.substr(0, 1);
// DEBUG OUTPUT
std::cout << "Tracking of GLONASS L2 C/A signal started on channel " << d_channel << " for satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN) << std::endl;
LOG(INFO) << "Starting tracking of satellite " << Gnss_Satellite(systemName[sys], d_acquisition_gnss_synchro->PRN) << " on channel " << d_channel;
// enable tracking
d_pull_in = true;
d_enable_tracking = true;
LOG(INFO) << "PULL-IN Doppler [Hz]=" << d_carrier_frequency_hz
<< " Code Phase correction [samples]=" << delay_correction_samples
<< " PULL-IN Code Phase [samples]=" << d_acq_code_phase_samples;
}
Glonass_L2_Ca_Dll_Pll_Tracking_cc::~Glonass_L2_Ca_Dll_Pll_Tracking_cc()
{
if (d_dump_file.is_open())
{
try
{
d_dump_file.close();
}
catch (const std::exception &ex)
{
LOG(WARNING) << "Exception in destructor " << ex.what();
}
}
if (d_dump)
{
if (d_channel == 0)
{
std::cout << "Writing .mat files ...";
}
Glonass_L2_Ca_Dll_Pll_Tracking_cc::save_matfile();
if (d_channel == 0)
{
std::cout << " done." << std::endl;
}
}
try
{
volk_gnsssdr_free(d_local_code_shift_chips);
volk_gnsssdr_free(d_correlator_outs);
volk_gnsssdr_free(d_ca_code);
delete[] d_Prompt_buffer;
multicorrelator_cpu.free();
}
catch (const std::exception &ex)
{
LOG(WARNING) << "Exception in destructor " << ex.what();
}
}
int Glonass_L2_Ca_Dll_Pll_Tracking_cc::save_matfile()
{
// READ DUMP FILE
std::ifstream::pos_type size;
int number_of_double_vars = 11;
int number_of_float_vars = 5;
int epoch_size_bytes = sizeof(unsigned long int) + sizeof(double) * number_of_double_vars +
sizeof(float) * number_of_float_vars + sizeof(unsigned int);
std::ifstream dump_file;
dump_file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
try
{
dump_file.open(d_dump_filename.c_str(), std::ios::binary | std::ios::ate);
}
catch (const std::ifstream::failure &e)
{
std::cerr << "Problem opening dump file:" << e.what() << std::endl;
return 1;
}
// count number of epochs and rewind
long int num_epoch = 0;
if (dump_file.is_open())
{
size = dump_file.tellg();
num_epoch = static_cast<long int>(size) / static_cast<long int>(epoch_size_bytes);
dump_file.seekg(0, std::ios::beg);
}
else
{
return 1;
}
float *abs_E = new float[num_epoch];
float *abs_P = new float[num_epoch];
float *abs_L = new float[num_epoch];
float *Prompt_I = new float[num_epoch];
float *Prompt_Q = new float[num_epoch];
unsigned long int *PRN_start_sample_count = new unsigned long int[num_epoch];
double *acc_carrier_phase_rad = new double[num_epoch];
double *carrier_doppler_hz = new double[num_epoch];
double *code_freq_chips = new double[num_epoch];
double *carr_error_hz = new double[num_epoch];
double *carr_error_filt_hz = new double[num_epoch];
double *code_error_chips = new double[num_epoch];
double *code_error_filt_chips = new double[num_epoch];
double *CN0_SNV_dB_Hz = new double[num_epoch];
double *carrier_lock_test = new double[num_epoch];
double *aux1 = new double[num_epoch];
double *aux2 = new double[num_epoch];
unsigned int *PRN = new unsigned int[num_epoch];
try
{
if (dump_file.is_open())
{
for (long int i = 0; i < num_epoch; i++)
{
dump_file.read(reinterpret_cast<char *>(&abs_E[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&abs_P[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&abs_L[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&Prompt_I[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&Prompt_Q[i]), sizeof(float));
dump_file.read(reinterpret_cast<char *>(&PRN_start_sample_count[i]), sizeof(unsigned long int));
dump_file.read(reinterpret_cast<char *>(&acc_carrier_phase_rad[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carrier_doppler_hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&code_freq_chips[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carr_error_hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carr_error_filt_hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&code_error_chips[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&code_error_filt_chips[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&CN0_SNV_dB_Hz[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&carrier_lock_test[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&aux1[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&aux2[i]), sizeof(double));
dump_file.read(reinterpret_cast<char *>(&PRN[i]), sizeof(unsigned int));
}
}
dump_file.close();
}
catch (const std::ifstream::failure &e)
{
std::cerr << "Problem reading dump file:" << e.what() << std::endl;
delete[] abs_E;
delete[] abs_P;
delete[] abs_L;
delete[] Prompt_I;
delete[] Prompt_Q;
delete[] PRN_start_sample_count;
delete[] acc_carrier_phase_rad;
delete[] carrier_doppler_hz;
delete[] code_freq_chips;
delete[] carr_error_hz;
delete[] carr_error_filt_hz;
delete[] code_error_chips;
delete[] code_error_filt_chips;
delete[] CN0_SNV_dB_Hz;
delete[] carrier_lock_test;
delete[] aux1;
delete[] aux2;
delete[] PRN;
return 1;
}
// WRITE MAT FILE
mat_t *matfp;
matvar_t *matvar;
std::string filename = d_dump_filename;
filename.erase(filename.length() - 4, 4);
filename.append(".mat");
matfp = Mat_CreateVer(filename.c_str(), NULL, MAT_FT_MAT73);
if (reinterpret_cast<long *>(matfp) != NULL)
{
size_t dims[2] = {1, static_cast<size_t>(num_epoch)};
matvar = Mat_VarCreate("abs_E", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, abs_E, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("abs_P", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, abs_P, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("abs_L", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, abs_L, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("Prompt_I", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, Prompt_I, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("Prompt_Q", MAT_C_SINGLE, MAT_T_SINGLE, 2, dims, Prompt_Q, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("PRN_start_sample_count", MAT_C_UINT64, MAT_T_UINT64, 2, dims, PRN_start_sample_count, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("acc_carrier_phase_rad", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, acc_carrier_phase_rad, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carrier_doppler_hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carrier_doppler_hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("code_freq_chips", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, code_freq_chips, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carr_error_hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carr_error_hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carr_error_filt_hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carr_error_filt_hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("code_error_chips", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, code_error_chips, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("code_error_filt_chips", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, code_error_filt_chips, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("CN0_SNV_dB_Hz", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, CN0_SNV_dB_Hz, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("carrier_lock_test", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, carrier_lock_test, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("aux1", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, aux1, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("aux2", MAT_C_DOUBLE, MAT_T_DOUBLE, 2, dims, aux2, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
matvar = Mat_VarCreate("PRN", MAT_C_UINT32, MAT_T_UINT32, 2, dims, PRN, 0);
Mat_VarWrite(matfp, matvar, MAT_COMPRESSION_ZLIB); // or MAT_COMPRESSION_NONE
Mat_VarFree(matvar);
}
Mat_Close(matfp);
delete[] abs_E;
delete[] abs_P;
delete[] abs_L;
delete[] Prompt_I;
delete[] Prompt_Q;
delete[] PRN_start_sample_count;
delete[] acc_carrier_phase_rad;
delete[] carrier_doppler_hz;
delete[] code_freq_chips;
delete[] carr_error_hz;
delete[] carr_error_filt_hz;
delete[] code_error_chips;
delete[] code_error_filt_chips;
delete[] CN0_SNV_dB_Hz;
delete[] carrier_lock_test;
delete[] aux1;
delete[] aux2;
delete[] PRN;
return 0;
}
int Glonass_L2_Ca_Dll_Pll_Tracking_cc::general_work(int noutput_items __attribute__((unused)), gr_vector_int &ninput_items __attribute__((unused)),
gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
{
// process vars
double carr_error_hz = 0.0;
double carr_error_filt_hz = 0.0;
double code_error_chips = 0.0;
double code_error_filt_chips = 0.0;
// Block input data and block output stream pointers
const gr_complex *in = reinterpret_cast<const gr_complex *>(input_items[0]); // PRN start block alignment
Gnss_Synchro **out = reinterpret_cast<Gnss_Synchro **>(&output_items[0]);
// GNSS_SYNCHRO OBJECT to interchange data between tracking->telemetry_decoder
Gnss_Synchro current_synchro_data = Gnss_Synchro();
if (d_enable_tracking == true)
{
// Fill the acquisition data
current_synchro_data = *d_acquisition_gnss_synchro;
// Receiver signal alignment
if (d_pull_in == true)
{
int samples_offset;
double acq_trk_shif_correction_samples;
int acq_to_trk_delay_samples;
acq_to_trk_delay_samples = d_sample_counter - d_acq_sample_stamp;
acq_trk_shif_correction_samples = d_current_prn_length_samples - fmod(static_cast<float>(acq_to_trk_delay_samples), static_cast<float>(d_current_prn_length_samples));
samples_offset = round(d_acq_code_phase_samples + acq_trk_shif_correction_samples);
current_synchro_data.Tracking_sample_counter = d_sample_counter + samples_offset;
d_sample_counter = d_sample_counter + samples_offset; // count for the processed samples
d_pull_in = false;
// take into account the carrier cycles accumulated in the pull in signal alignment
d_acc_carrier_phase_rad -= d_carrier_doppler_phase_step_rad * samples_offset;
current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_rad;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.fs = d_fs_in;
current_synchro_data.correlation_length_ms = 1;
*out[0] = current_synchro_data;
consume_each(samples_offset); // shift input to perform alignment with local replica
return 1;
}
// ################# CARRIER WIPEOFF AND CORRELATORS ##############################
// perform carrier wipe-off and compute Early, Prompt and Late correlation
multicorrelator_cpu.set_input_output_vectors(d_correlator_outs, in);
multicorrelator_cpu.Carrier_wipeoff_multicorrelator_resampler(d_rem_carr_phase_rad,
d_carrier_phase_step_rad,
d_rem_code_phase_chips,
d_code_phase_step_chips,
d_current_prn_length_samples);
// ################## PLL ##########################################################
// PLL discriminator
// Update PLL discriminator [rads/Ti -> Secs/Ti]
carr_error_hz = pll_cloop_two_quadrant_atan(d_correlator_outs[1]) / GLONASS_TWO_PI; // prompt output
// Carrier discriminator filter
carr_error_filt_hz = d_carrier_loop_filter.get_carrier_nco(carr_error_hz);
// New carrier Doppler frequency estimation
d_carrier_frequency_hz += carr_error_filt_hz;
d_carrier_doppler_hz += carr_error_filt_hz;
d_code_freq_chips = GLONASS_L2_CA_CODE_RATE_HZ + ((d_carrier_doppler_hz * GLONASS_L2_CA_CODE_RATE_HZ) / d_glonass_freq_ch);
// ################## DLL ##########################################################
// DLL discriminator
code_error_chips = dll_nc_e_minus_l_normalized(d_correlator_outs[0], d_correlator_outs[2]); // [chips/Ti] //early and late
// Code discriminator filter
code_error_filt_chips = d_code_loop_filter.get_code_nco(code_error_chips); // [chips/second]
double T_chip_seconds = 1.0 / static_cast<double>(d_code_freq_chips);
double T_prn_seconds = T_chip_seconds * GLONASS_L2_CA_CODE_LENGTH_CHIPS;
double code_error_filt_secs = (T_prn_seconds * code_error_filt_chips * T_chip_seconds); //[seconds]
//double code_error_filt_secs = (GPS_L1_CA_CODE_PERIOD * code_error_filt_chips) / GLONASS_L1_CA_CODE_RATE_HZ; // [seconds]
// ################## CARRIER AND CODE NCO BUFFER ALIGNEMENT #######################
// keep alignment parameters for the next input buffer
// Compute the next buffer length based in the new period of the PRN sequence and the code phase error estimation
//double T_chip_seconds = 1.0 / static_cast<double>(d_code_freq_chips);
//double T_prn_seconds = T_chip_seconds * GLONASS_L1_CA_CODE_LENGTH_CHIPS;
double T_prn_samples = T_prn_seconds * static_cast<double>(d_fs_in);
double K_blk_samples = T_prn_samples + d_rem_code_phase_samples + code_error_filt_secs * static_cast<double>(d_fs_in);
d_current_prn_length_samples = round(K_blk_samples); // round to a discrete number of samples
//################### PLL COMMANDS #################################################
// carrier phase step (NCO phase increment per sample) [rads/sample]
d_carrier_doppler_phase_step_rad = GLONASS_TWO_PI * d_carrier_doppler_hz / static_cast<double>(d_fs_in);
d_carrier_phase_step_rad = GLONASS_TWO_PI * d_carrier_frequency_hz / static_cast<double>(d_fs_in);
// remnant carrier phase to prevent overflow in the code NCO
d_rem_carr_phase_rad = d_rem_carr_phase_rad + d_carrier_phase_step_rad * d_current_prn_length_samples;
d_rem_carr_phase_rad = fmod(d_rem_carr_phase_rad, GLONASS_TWO_PI);
// carrier phase accumulator
d_acc_carrier_phase_rad -= d_carrier_doppler_phase_step_rad * d_current_prn_length_samples;
//################### DLL COMMANDS #################################################
// code phase step (Code resampler phase increment per sample) [chips/sample]
d_code_phase_step_chips = d_code_freq_chips / static_cast<double>(d_fs_in);
// remnant code phase [chips]
d_rem_code_phase_samples = K_blk_samples - d_current_prn_length_samples; // rounding error < 1 sample
d_rem_code_phase_chips = d_code_freq_chips * (d_rem_code_phase_samples / static_cast<double>(d_fs_in));
// ####### CN0 ESTIMATION AND LOCK DETECTORS ######
if (d_cn0_estimation_counter < CN0_ESTIMATION_SAMPLES)
{
// fill buffer with prompt correlator output values
d_Prompt_buffer[d_cn0_estimation_counter] = d_correlator_outs[1]; //prompt
d_cn0_estimation_counter++;
}
else
{
d_cn0_estimation_counter = 0;
// Code lock indicator
d_CN0_SNV_dB_Hz = cn0_svn_estimator(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES, d_fs_in, GLONASS_L2_CA_CODE_LENGTH_CHIPS);
// Carrier lock indicator
d_carrier_lock_test = carrier_lock_detector(d_Prompt_buffer, CN0_ESTIMATION_SAMPLES);
// Loss of lock detection
if (d_carrier_lock_test < d_carrier_lock_threshold or d_CN0_SNV_dB_Hz < FLAGS_cn0_min)
{
d_carrier_lock_fail_counter++;
}
else
{
if (d_carrier_lock_fail_counter > 0) d_carrier_lock_fail_counter--;
}
if (d_carrier_lock_fail_counter > FLAGS_max_lock_fail)
{
std::cout << "Loss of lock in channel " << d_channel << "!" << std::endl;
LOG(INFO) << "Loss of lock in channel " << d_channel << "!";
this->message_port_pub(pmt::mp("events"), pmt::from_long(3)); // 3 -> loss of lock
d_carrier_lock_fail_counter = 0;
d_enable_tracking = false; // TODO: check if disabling tracking is consistent with the channel state machine
}
}
// ########### Output the tracking data to navigation and PVT ##########
current_synchro_data.Prompt_I = static_cast<double>((d_correlator_outs[1]).real());
current_synchro_data.Prompt_Q = static_cast<double>((d_correlator_outs[1]).imag());
current_synchro_data.Tracking_sample_counter = d_sample_counter + d_current_prn_length_samples;
current_synchro_data.Code_phase_samples = d_rem_code_phase_samples;
current_synchro_data.Carrier_phase_rads = d_acc_carrier_phase_rad;
current_synchro_data.Carrier_Doppler_hz = d_carrier_doppler_hz;
current_synchro_data.CN0_dB_hz = d_CN0_SNV_dB_Hz;
current_synchro_data.Flag_valid_symbol_output = true;
current_synchro_data.correlation_length_ms = 1;
}
else
{
for (int n = 0; n < d_n_correlator_taps; n++)
{
d_correlator_outs[n] = gr_complex(0, 0);
}
current_synchro_data.Tracking_sample_counter = d_sample_counter + d_current_prn_length_samples;
current_synchro_data.System = {'R'};
current_synchro_data.correlation_length_ms = 1;
}
//assign the GNURadio block output data
current_synchro_data.fs = d_fs_in;
*out[0] = current_synchro_data;
if (d_dump)
{
// MULTIPLEXED FILE RECORDING - Record results to file
float prompt_I;
float prompt_Q;
float tmp_E, tmp_P, tmp_L;
double tmp_double;
unsigned long int tmp_long;
prompt_I = d_correlator_outs[1].real();
prompt_Q = d_correlator_outs[1].imag();
tmp_E = std::abs<float>(d_correlator_outs[0]);
tmp_P = std::abs<float>(d_correlator_outs[1]);
tmp_L = std::abs<float>(d_correlator_outs[2]);
try
{
// EPR
d_dump_file.write(reinterpret_cast<char *>(&tmp_E), sizeof(float));
d_dump_file.write(reinterpret_cast<char *>(&tmp_P), sizeof(float));
d_dump_file.write(reinterpret_cast<char *>(&tmp_L), sizeof(float));
// PROMPT I and Q (to analyze navigation symbols)
d_dump_file.write(reinterpret_cast<char *>(&prompt_I), sizeof(float));
d_dump_file.write(reinterpret_cast<char *>(&prompt_Q), sizeof(float));
// PRN start sample stamp
tmp_long = d_sample_counter + d_current_prn_length_samples;
d_dump_file.write(reinterpret_cast<char *>(&tmp_long), sizeof(unsigned long int));
// accumulated carrier phase
d_dump_file.write(reinterpret_cast<char *>(&d_acc_carrier_phase_rad), sizeof(double));
// carrier and code frequency
d_dump_file.write(reinterpret_cast<char *>(&d_carrier_frequency_hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&d_code_freq_chips), sizeof(double));
// PLL commands
d_dump_file.write(reinterpret_cast<char *>(&carr_error_hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&carr_error_filt_hz), sizeof(double));
// DLL commands
d_dump_file.write(reinterpret_cast<char *>(&code_error_chips), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&code_error_filt_chips), sizeof(double));
// CN0 and carrier lock test
d_dump_file.write(reinterpret_cast<char *>(&d_CN0_SNV_dB_Hz), sizeof(double));
d_dump_file.write(reinterpret_cast<char *>(&d_carrier_lock_test), sizeof(double));
// AUX vars (for debug purposes)
tmp_double = d_rem_code_phase_samples;
d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double));
tmp_double = static_cast<double>(d_sample_counter);
d_dump_file.write(reinterpret_cast<char *>(&tmp_double), sizeof(double));
// PRN
unsigned int prn_ = d_acquisition_gnss_synchro->PRN;
d_dump_file.write(reinterpret_cast<char *>(&prn_), sizeof(unsigned int));
}
catch (const std::ifstream::failure &e)
{
LOG(WARNING) << "Exception writing trk dump file " << e.what();
}
}
consume_each(d_current_prn_length_samples); // this is necessary in gr::block derivates
d_sample_counter += d_current_prn_length_samples; // count for the processed samples
return 1; // output tracking result ALWAYS even in the case of d_enable_tracking==false
}
void Glonass_L2_Ca_Dll_Pll_Tracking_cc::set_channel(unsigned int channel)
{
d_channel = channel;
LOG(INFO) << "Tracking Channel set to " << d_channel;
// ############# ENABLE DATA FILE LOG #################
if (d_dump == true)
{
if (d_dump_file.is_open() == false)
{
try
{
d_dump_filename.append(boost::lexical_cast<std::string>(d_channel));
d_dump_filename.append(".dat");
d_dump_file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
d_dump_file.open(d_dump_filename.c_str(), std::ios::out | std::ios::binary);
LOG(INFO) << "Tracking dump enabled on channel " << d_channel << " Log file: " << d_dump_filename.c_str();
}
catch (const std::ifstream::failure &e)
{
LOG(WARNING) << "channel " << d_channel << " Exception opening trk dump file " << e.what();
}
}
}
}
void Glonass_L2_Ca_Dll_Pll_Tracking_cc::set_gnss_synchro(Gnss_Synchro *p_gnss_synchro)
{
d_acquisition_gnss_synchro = p_gnss_synchro;
}

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/*!
* \file glonass_l2_ca_dll_pll_tracking_cc.h
* \brief Implementation of a code DLL + carrier PLL tracking block
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
*
*
* Code DLL + carrier PLL according to the algorithms described in:
* 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
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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_GLONASS_L2_CA_DLL_PLL_TRACKING_CC_H
#define GNSS_SDR_GLONASS_L2_CA_DLL_PLL_TRACKING_CC_H
#include "gnss_synchro.h"
#include "tracking_2nd_DLL_filter.h"
#include "tracking_2nd_PLL_filter.h"
#include "cpu_multicorrelator.h"
#include <gnuradio/block.h>
#include <fstream>
#include <map>
#include <string>
class Glonass_L2_Ca_Dll_Pll_Tracking_cc;
typedef boost::shared_ptr<Glonass_L2_Ca_Dll_Pll_Tracking_cc>
glonass_l2_ca_dll_pll_tracking_cc_sptr;
glonass_l2_ca_dll_pll_tracking_cc_sptr
glonass_l2_ca_dll_pll_make_tracking_cc(long if_freq,
long fs_in, unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float early_late_space_chips);
/*!
* \brief This class implements a DLL + PLL tracking loop block
*/
class Glonass_L2_Ca_Dll_Pll_Tracking_cc : public gr::block
{
public:
~Glonass_L2_Ca_Dll_Pll_Tracking_cc();
void set_channel(unsigned int channel);
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro);
void start_tracking();
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 forecast(int noutput_items, gr_vector_int& ninput_items_required);
private:
friend glonass_l2_ca_dll_pll_tracking_cc_sptr
glonass_l2_ca_dll_pll_make_tracking_cc(long if_freq,
long fs_in, unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float early_late_space_chips);
Glonass_L2_Ca_Dll_Pll_Tracking_cc(long if_freq,
long fs_in, unsigned int vector_length,
bool dump,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float early_late_space_chips);
// tracking configuration vars
unsigned int d_vector_length;
bool d_dump;
Gnss_Synchro* d_acquisition_gnss_synchro;
unsigned int d_channel;
long d_if_freq;
long d_fs_in;
long d_glonass_freq_ch;
double d_early_late_spc_chips;
// remaining code phase and carrier phase between tracking loops
double d_rem_code_phase_samples;
double d_rem_code_phase_chips;
double d_rem_carr_phase_rad;
// PLL and DLL filter library
Tracking_2nd_DLL_filter d_code_loop_filter;
Tracking_2nd_PLL_filter d_carrier_loop_filter;
// acquisition
double d_acq_code_phase_samples;
double d_acq_carrier_doppler_hz;
// correlator
int d_n_correlator_taps;
gr_complex* d_ca_code;
float* d_local_code_shift_chips;
gr_complex* d_correlator_outs;
cpu_multicorrelator multicorrelator_cpu;
// tracking vars
double d_code_freq_chips;
double d_code_phase_step_chips;
double d_carrier_doppler_hz;
double d_carrier_doppler_phase_step_rad;
double d_carrier_frequency_hz;
double d_carrier_phase_step_rad;
double d_acc_carrier_phase_rad;
double d_code_phase_samples;
//PRN period in samples
int d_current_prn_length_samples;
//processing samples counters
unsigned long int d_sample_counter;
unsigned long int d_acq_sample_stamp;
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
gr_complex* d_Prompt_buffer;
double d_carrier_lock_test;
double d_CN0_SNV_dB_Hz;
double d_carrier_lock_threshold;
int d_carrier_lock_fail_counter;
// control vars
bool d_enable_tracking;
bool d_pull_in;
// file dump
std::string d_dump_filename;
std::ofstream d_dump_file;
std::map<std::string, std::string> systemName;
std::string sys;
int save_matfile();
};
#endif //GNSS_SDR_GLONASS_L2_CA_DLL_PLL_TRACKING_CC_H

160
src/core/receiver/gnss_block_factory.cc
View File

@ -79,6 +79,7 @@
#include "galileo_e5a_noncoherent_iq_acquisition_caf.h"
#include "galileo_e5a_pcps_acquisition.h"
#include "glonass_l1_ca_pcps_acquisition.h"
#include "glonass_l2_ca_pcps_acquisition.h"
#include "gps_l1_ca_dll_pll_tracking.h"
#include "gps_l1_ca_dll_pll_c_aid_tracking.h"
#include "gps_l1_ca_tcp_connector_tracking.h"
@ -88,6 +89,8 @@
#include "gps_l2_m_dll_pll_tracking.h"
#include "glonass_l1_ca_dll_pll_tracking.h"
#include "glonass_l1_ca_dll_pll_c_aid_tracking.h"
#include "glonass_l2_ca_dll_pll_tracking.h"
#include "glonass_l2_ca_dll_pll_c_aid_tracking.h"
#include "gps_l5i_dll_pll_tracking.h"
#include "gps_l1_ca_telemetry_decoder.h"
#include "gps_l2c_telemetry_decoder.h"
@ -95,6 +98,7 @@
#include "galileo_e1b_telemetry_decoder.h"
#include "galileo_e5a_telemetry_decoder.h"
#include "glonass_l1_ca_telemetry_decoder.h"
#include "glonass_l2_ca_telemetry_decoder.h"
#include "sbas_l1_telemetry_decoder.h"
#include "hybrid_observables.h"
#include "rtklib_pvt.h"
@ -246,6 +250,7 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetObservables(std::shared
GPS_channels += configuration->property("Channels_2S.count", 0);
GPS_channels += configuration->property("Channels_L5.count", 0);
unsigned int Glonass_channels = configuration->property("Channels_1G.count", 0);
Glonass_channels += configuration->property("Channels_2G.count", 0);
return GetBlock(configuration, "Observables", implementation, Galileo_channels + GPS_channels + Glonass_channels, Galileo_channels + GPS_channels + Glonass_channels);
}
@ -261,6 +266,7 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetPVT(std::shared_ptr<Con
GPS_channels += configuration->property("Channels_2S.count", 0);
GPS_channels += configuration->property("Channels_L5.count", 0);
unsigned int Glonass_channels = configuration->property("Channels_1G.count", 0);
Glonass_channels += configuration->property("Channels_2G.count", 0);
return GetBlock(configuration, "PVT", implementation, Galileo_channels + GPS_channels + Glonass_channels, 0);
}
@ -604,6 +610,77 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetChannel_1G(
}
//********* GLONASS L2 C/A CHANNEL *****************
std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetChannel_2G(
std::shared_ptr<ConfigurationInterface> configuration,
std::string acq, std::string trk, std::string tlm, int channel,
boost::shared_ptr<gr::msg_queue> queue)
{
std::stringstream stream;
stream << channel;
std::string id = stream.str();
LOG(INFO) << "Instantiating Channel " << channel << " with Acquisition Implementation: "
<< acq << ", Tracking Implementation: " << trk << ", Telemetry Decoder Implementation: " << tlm;
std::string aux = configuration->property("Acquisition_2G" + boost::lexical_cast<std::string>(channel) + ".implementation", std::string("W"));
std::string appendix1;
if (aux.compare("W") != 0)
{
appendix1 = boost::lexical_cast<std::string>(channel);
}
else
{
appendix1 = "";
}
aux = configuration->property("Tracking_2G" + boost::lexical_cast<std::string>(channel) + ".implementation", std::string("W"));
std::string appendix2;
if (aux.compare("W") != 0)
{
appendix2 = boost::lexical_cast<std::string>(channel);
}
else
{
appendix2 = "";
}
aux = configuration->property("TelemetryDecoder_2G" + boost::lexical_cast<std::string>(channel) + ".implementation", std::string("W"));
std::string appendix3;
if (aux.compare("W") != 0)
{
appendix3 = boost::lexical_cast<std::string>(channel);
}
else
{
appendix3 = "";
}
// Automatically detect input data type
std::shared_ptr<InMemoryConfiguration> config;
config = std::make_shared<InMemoryConfiguration>();
std::string default_item_type = "gr_complex";
std::string acq_item_type = configuration->property("Acquisition_2G" + appendix1 + ".item_type", default_item_type);
std::string trk_item_type = configuration->property("Tracking_2G" + appendix2 + ".item_type", default_item_type);
if (acq_item_type.compare(trk_item_type))
{
LOG(ERROR) << "Acquisition and Tracking blocks must have the same input data type!";
}
config->set_property("Channel.item_type", acq_item_type);
std::unique_ptr<GNSSBlockInterface> pass_through_ = GetBlock(config, "Channel", "Pass_Through", 1, 1, queue);
std::unique_ptr<AcquisitionInterface> acq_ = GetAcqBlock(configuration, "Acquisition_2G" + appendix1, acq, 1, 0);
std::unique_ptr<TrackingInterface> trk_ = GetTrkBlock(configuration, "Tracking_2G" + appendix2, trk, 1, 1);
std::unique_ptr<TelemetryDecoderInterface> tlm_ = GetTlmBlock(configuration, "TelemetryDecoder_2G" + appendix3, tlm, 1, 1);
std::unique_ptr<GNSSBlockInterface> channel_(new Channel(configuration.get(), channel, std::move(pass_through_),
std::move(acq_),
std::move(trk_),
std::move(tlm_),
"Channel", "2G", queue));
return channel_;
}
//********* GPS L5 CHANNEL *****************
std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetChannel_L5(
std::shared_ptr<ConfigurationInterface> configuration,
@ -687,6 +764,7 @@ std::unique_ptr<std::vector<std::unique_ptr<GNSSBlockInterface>>> GNSSBlockFacto
unsigned int Channels_1B_count = configuration->property("Channels_1B.count", 0);
unsigned int Channels_5X_count = configuration->property("Channels_5X.count", 0);
unsigned int Channels_1G_count = configuration->property("Channels_1G.count", 0);
unsigned int Channels_2G_count = configuration->property("Channels_2G.count", 0);
unsigned int Channels_L5_count = configuration->property("Channels_L5.count", 0);
unsigned int total_channels = Channels_1C_count +
@ -694,6 +772,7 @@ std::unique_ptr<std::vector<std::unique_ptr<GNSSBlockInterface>>> GNSSBlockFacto
Channels_1B_count +
Channels_5X_count +
Channels_1G_count +
Channels_2G_count +
Channels_L5_count;
std::unique_ptr<std::vector<std::unique_ptr<GNSSBlockInterface>>> channels(new std::vector<std::unique_ptr<GNSSBlockInterface>>(total_channels));
@ -874,6 +953,36 @@ std::unique_ptr<std::vector<std::unique_ptr<GNSSBlockInterface>>> GNSSBlockFacto
channel_absolute_id++;
}
//**************** GLONASS L2 C/A CHANNELS **********************
LOG(INFO) << "Getting " << Channels_2G_count << " GLONASS L2 C/A channels";
acquisition_implementation = configuration->property("Acquisition_2G.implementation", default_implementation);
tracking_implementation = configuration->property("Tracking_2G.implementation", default_implementation);
telemetry_decoder_implementation = configuration->property("TelemetryDecoder_2G.implementation", default_implementation);
for (unsigned int i = 0; i < Channels_2G_count; i++)
{
//(i.e. Acquisition_2G0.implementation=xxxx)
std::string acquisition_implementation_specific = configuration->property(
"Acquisition_2G" + boost::lexical_cast<std::string>(channel_absolute_id) + ".implementation",
acquisition_implementation);
//(i.e. Tracking_2G0.implementation=xxxx)
std::string tracking_implementation_specific = configuration->property(
"Tracking_2G" + boost::lexical_cast<std::string>(channel_absolute_id) + ".implementation",
tracking_implementation);
std::string telemetry_decoder_implementation_specific = configuration->property(
"TelemetryDecoder_2G" + boost::lexical_cast<std::string>(channel_absolute_id) + ".implementation",
telemetry_decoder_implementation);
// Push back the channel to the vector of channels
channels->at(channel_absolute_id) = std::move(GetChannel_2G(configuration,
acquisition_implementation_specific,
tracking_implementation_specific,
telemetry_decoder_implementation_specific,
channel_absolute_id,
queue));
channel_absolute_id++;
}
return channels;
}
@ -1282,7 +1391,12 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetBlock(
out_streams));
block = std::move(block_);
}
else if (implementation.compare("GLONASS_L2_CA_PCPS_Acquisition") == 0)
{
std::unique_ptr<AcquisitionInterface> block_(new GlonassL2CaPcpsAcquisition(configuration.get(), role, in_streams,
out_streams));
block = std::move(block_);
}
// TRACKING BLOCKS -------------------------------------------------------------
else if (implementation.compare("GPS_L1_CA_DLL_PLL_Tracking") == 0)
{
@ -1360,7 +1474,18 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetBlock(
out_streams));
block = std::move(block_);
}
else if (implementation.compare("GLONASS_L2_CA_DLL_PLL_Tracking") == 0)
{
std::unique_ptr<GNSSBlockInterface> block_(new GlonassL2CaDllPllTracking(configuration.get(), role, in_streams,
out_streams));
block = std::move(block_);
}
else if (implementation.compare("GLONASS_L2_CA_DLL_PLL_C_Aid_Tracking") == 0)
{
std::unique_ptr<GNSSBlockInterface> block_(new GlonassL2CaDllPllCAidTracking(configuration.get(), role, in_streams,
out_streams));
block = std::move(block_);
}
// TELEMETRY DECODERS ----------------------------------------------------------
else if (implementation.compare("GPS_L1_CA_Telemetry_Decoder") == 0)
{
@ -1404,7 +1529,12 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetBlock(
out_streams));
block = std::move(block_);
}
else if (implementation.compare("GLONASS_L2_CA_Telemetry_Decoder") == 0)
{
std::unique_ptr<GNSSBlockInterface> block_(new GlonassL2CaTelemetryDecoder(configuration.get(), role, in_streams,
out_streams));
block = std::move(block_);
}
// OBSERVABLES -----------------------------------------------------------------
else if ((implementation.compare("Hybrid_Observables") == 0) || (implementation.compare("GPS_L1_CA_Observables") == 0) || (implementation.compare("GPS_L2C_Observables") == 0) ||
(implementation.compare("Galileo_E5A_Observables") == 0))
@ -1555,6 +1685,12 @@ std::unique_ptr<AcquisitionInterface> GNSSBlockFactory::GetAcqBlock(
out_streams));
block = std::move(block_);
}
else if (implementation.compare("GLONASS_L2_CA_PCPS_Acquisition") == 0)
{
std::unique_ptr<AcquisitionInterface> block_(new GlonassL2CaPcpsAcquisition(configuration.get(), role, in_streams,
out_streams));
block = std::move(block_);
}
else
{
// Log fatal. This causes execution to stop.
@ -1649,6 +1785,18 @@ std::unique_ptr<TrackingInterface> GNSSBlockFactory::GetTrkBlock(
out_streams));
block = std::move(block_);
}
else if (implementation.compare("GLONASS_L2_CA_DLL_PLL_Tracking") == 0)
{
std::unique_ptr<TrackingInterface> block_(new GlonassL2CaDllPllTracking(configuration.get(), role, in_streams,
out_streams));
block = std::move(block_);
}
else if (implementation.compare("GLONASS_L2_CA_DLL_PLL_C_Aid_Tracking") == 0)
{
std::unique_ptr<TrackingInterface> block_(new GlonassL2CaDllPllCAidTracking(configuration.get(), role, in_streams,
out_streams));
block = std::move(block_);
}
else
{
// Log fatal. This causes execution to stop.
@ -1703,6 +1851,12 @@ std::unique_ptr<TelemetryDecoderInterface> GNSSBlockFactory::GetTlmBlock(
out_streams));
block = std::move(block_);
}
else if (implementation.compare("GLONASS_L2_CA_Telemetry_Decoder") == 0)
{
std::unique_ptr<TelemetryDecoderInterface> block_(new GlonassL2CaTelemetryDecoder(configuration.get(), role, in_streams,
out_streams));
block = std::move(block_);
}
else if (implementation.compare("GPS_L5_Telemetry_Decoder") == 0)
{
std::unique_ptr<TelemetryDecoderInterface> block_(new GpsL5TelemetryDecoder(configuration.get(), role, in_streams,

4
src/core/receiver/gnss_block_factory.h
View File

@ -102,6 +102,10 @@ private:
std::string acq, std::string trk, std::string tlm, int channel,
boost::shared_ptr<gr::msg_queue> queue);
std::unique_ptr<GNSSBlockInterface> GetChannel_2G(std::shared_ptr<ConfigurationInterface> configuration,
std::string acq, std::string trk, std::string tlm, int channel,
boost::shared_ptr<gr::msg_queue> queue);
std::unique_ptr<AcquisitionInterface> GetAcqBlock(
std::shared_ptr<ConfigurationInterface> configuration,
std::string role,

18
src/core/receiver/gnss_flowgraph.cc
View File

@ -544,6 +544,7 @@ void GNSSFlowgraph::set_signals_list()
configuration_->property("Channels_1B.count", 0) +
configuration_->property("Channels_5X.count", 0) +
configuration_->property("Channels_1G.count", 0) +
configuration_->property("Channels_2G.count", 0) +
configuration_->property("Channels_5X.count", 0) +
configuration_->property("Channels_L5.count", 0);
@ -733,6 +734,21 @@ void GNSSFlowgraph::set_signals_list()
std::string("1G")));
}
}
if (configuration_->property("Channels_2G.count", 0) > 0)
{
/*
* Loop to create the list of GLONASS L2 C/A signals
*/
for (available_gnss_prn_iter = available_glonass_prn.begin();
available_gnss_prn_iter != available_glonass_prn.end();
available_gnss_prn_iter++)
{
available_GNSS_signals_.push_back(Gnss_Signal(
Gnss_Satellite(std::string("Glonass"), *available_gnss_prn_iter),
std::string("2G")));
}
}
/*
* Ordering the list of signals from configuration file
*/
@ -746,7 +762,7 @@ void GNSSFlowgraph::set_signals_list()
std::string gnss_system;
if ((gnss_signal.compare("1C") == 0) or (gnss_signal.compare("2S") == 0) or (gnss_signal.compare("L5") == 0)) gnss_system = "GPS";
if ((gnss_signal.compare("1B") == 0) or (gnss_signal.compare("5X") == 0)) gnss_system = "Galileo";
if ((gnss_signal.compare("1G") == 0) /*or (gnss_signal.compare("") == 0)*/) gnss_system = "Glonass";
if ((gnss_signal.compare("1G") == 0) or (gnss_signal.compare("2G") == 0)) gnss_system = "Glonass";
unsigned int sat = configuration_->property("Channel" + boost::lexical_cast<std::string>(i) + ".satellite", 0);
LOG(INFO) << "Channel " << i << " system " << gnss_system << ", signal " << gnss_signal << ", sat " << sat;
if (sat == 0) // 0 = not PRN in configuration file

21
src/core/system_parameters/GLONASS_L1_CA.h → src/core/system_parameters/GLONASS_L1_L2_CA.h
View File

@ -1,6 +1,7 @@
/*!
* \file GLONASS_L1_CA.h
* \file GLONASS_L1_L2_CA.h
* \brief Defines system parameters for GLONASS L1 C/A signal and NAV data
* \note File renamed from GLONASS_L1_CA.h to GLONASS_L1_L2_CA.h to accommodate GLO L2 addition
* \author Damian Miralles, 2017. dmiralles2009(at)gmail.com
*
* -------------------------------------------------------------------------
@ -29,8 +30,8 @@
*/
#ifndef GNSS_SDR_GLONASS_L1_CA_H_
#define GNSS_SDR_GLONASS_L1_CA_H_
#ifndef GNSS_SDR_GLONASS_L1_L2_CA_H_
#define GNSS_SDR_GLONASS_L1_L2_CA_H_
#include "gnss_frequencies.h"
#include "MATH_CONSTANTS.h"
@ -79,8 +80,13 @@ const double GLONASS_SUN_GM = 0.1325263e12; //!< Solar gravitational
const double GLONASS_SUN_SEMI_MAJOR_AXIS = 1.49598e8; //!< Semi-major axis of solar orbit [km];
const double GLONASS_SUN_ECCENTRICITY = 0.016719; //!< Eccentricity of solar orbit
// carrier and code frequencies
const double GLONASS_L2_FREQ_HZ = FREQ2_GLO; //!< L1 [Hz]
const double GLONASS_L2_CA_FREQ_HZ = FREQ2_GLO; //!< L2 [Hz]
const double GLONASS_L2_CA_DFREQ_HZ = DFRQ2_GLO; //!< Freq Bias for GLONASS L1 [Hz]
const double GLONASS_L2_CA_CODE_RATE_HZ = 0.511e6; //!< GLONASS L1 C/A code rate [chips/s]
const double GLONASS_L2_CA_CODE_LENGTH_CHIPS = 511.0; //!< GLONASS L1 C/A code length [chips]
const double GLONASS_L2_CA_CODE_PERIOD = 0.001; //!< GLONASS L1 C/A code period [seconds]
const double GLONASS_L2_CA_CHIP_PERIOD = 1.9569e-06; //!< GLONASS L1 C/A chip period [seconds]
const double GLONASS_L2_CA_SYMBOL_RATE_BPS = 1000;
const double GLONASS_L1_CA_FREQ_HZ = FREQ1_GLO; //!< L1 [Hz]
const double GLONASS_L1_CA_DFREQ_HZ = DFRQ1_GLO; //!< Freq Bias for GLONASS L1 [Hz]
@ -89,7 +95,8 @@ const double GLONASS_L1_CA_CODE_LENGTH_CHIPS = 511.0; //!< GLONASS L1 C/A code
const double GLONASS_L1_CA_CODE_PERIOD = 0.001; //!< GLONASS L1 C/A code period [seconds]
const double GLONASS_L1_CA_CHIP_PERIOD = 1.9569e-06; //!< GLONASS L1 C/A chip period [seconds]
const double GLONASS_L1_CA_SYMBOL_RATE_BPS = 1000;
const int GLONASS_L1_CA_NBR_SATS = 24; // STRING DATA WITHOUT PREAMBLE
const int GLONASS_CA_NBR_SATS = 24; // STRING DATA WITHOUT PREAMBLE
/*!
* \brief Record of leap seconds definition for GLOT to GPST conversion and vice versa
@ -320,4 +327,4 @@ const std::vector<std::pair<int, int>> B1({{6, 11}});
const std::vector<std::pair<int, int>> B2({{17, 10}});
#endif /* GNSS_SDR_GLONASS_L1_CA_H_ */
#endif /* GNSS_SDR_GLONASS_L1_L2_CA_H_ */

2
src/core/system_parameters/glonass_gnav_ephemeris.cc
View File

@ -31,9 +31,9 @@
*/
#include "glonass_gnav_ephemeris.h"
#include "GLONASS_L1_CA.h"
#include "gnss_satellite.h"
#include <cmath>
#include "GLONASS_L1_L2_CA.h"
Glonass_Gnav_Ephemeris::Glonass_Gnav_Ephemeris()
{

2
src/core/system_parameters/glonass_gnav_navigation_message.cc
View File

@ -83,7 +83,7 @@ void Glonass_Gnav_Navigation_Message::reset()
// Data update information
d_previous_tb = 0.0;
for (unsigned int i = 0; i < GLONASS_L1_CA_NBR_SATS; i++)
for (unsigned int i = 0; i < GLONASS_CA_NBR_SATS; i++)
d_previous_Na[i] = 0.0;
std::map<int, std::string> satelliteBlock; //!< Map that stores to which block the PRN belongs http://www.navcen.uscg.gov/?Do=constellationStatus

6
src/core/system_parameters/glonass_gnav_navigation_message.h
View File

@ -35,11 +35,11 @@
#define GNSS_SDR_GLONASS_GNAV_NAVIGATION_MESSAGE_H_
#include "GLONASS_L1_CA.h"
#include "glonass_gnav_ephemeris.h"
#include "glonass_gnav_almanac.h"
#include "glonass_gnav_utc_model.h"
#include <bitset>
#include "GLONASS_L1_L2_CA.h"
/*!
@ -65,7 +65,7 @@ public:
Glonass_Gnav_Ephemeris gnav_ephemeris; //!< Ephemeris information decoded
Glonass_Gnav_Utc_Model gnav_utc_model; //!< UTC model information
Glonass_Gnav_Almanac gnav_almanac[GLONASS_L1_CA_NBR_SATS]; //!< Almanac information for all 24 satellites
Glonass_Gnav_Almanac gnav_almanac[GLONASS_CA_NBR_SATS]; //!< Almanac information for all 24 satellites
// Ephemeris Flags and control variables
bool flag_all_ephemeris; //!< Flag indicating that all strings containing ephemeris have been received
@ -101,7 +101,7 @@ public:
double d_satClkDrift; //!< Satellite clock drift
double d_previous_tb; //!< Previous iode for the Glonass_Gnav_Ephemeris object. Used to determine when new data arrives
double d_previous_Na[GLONASS_L1_CA_NBR_SATS]; //!< Previous time for almanac of the Glonass_Gnav_Almanac object
double d_previous_Na[GLONASS_CA_NBR_SATS]; //!< Previous time for almanac of the Glonass_Gnav_Almanac object
/*!
* \brief Compute CRC for GLONASS GNAV strings

8
src/core/system_parameters/rtcm.cc
View File

@ -4014,7 +4014,7 @@ int Rtcm::set_DF047(const Gnss_Synchro& gnss_synchroL1, const Gnss_Synchro& gnss
//TODO Need to consider frequency channel in this fields
int Rtcm::set_DF048(const Gnss_Synchro& gnss_synchroL1, const Gnss_Synchro& gnss_synchroL2)
{
const double lambda2 = GLONASS_C_m_s / GLONASS_L2_FREQ_HZ;
const double lambda2 = GLONASS_C_m_s / GLONASS_L2_CA_FREQ_HZ;
int l2_phaserange_minus_l1_pseudorange = 0xFFF80000;
double ambiguity = std::floor(gnss_synchroL1.Pseudorange_m / 599584.92);
double glonass_L1_pseudorange = std::round((gnss_synchroL1.Pseudorange_m - ambiguity * 599584.92) / 0.02);
@ -5260,7 +5260,7 @@ int Rtcm::set_DF401(const Gnss_Synchro& gnss_synchro)
if ((sig.compare("2C") == 0) && (sys.compare("R") == 0))
{
// TODO Need to add slot number and freq number to gnss_syncro
lambda = GLONASS_C_m_s / (GLONASS_L2_FREQ_HZ);
lambda = GLONASS_C_m_s / (GLONASS_L2_CA_FREQ_HZ);
}
phrng_m = (gnss_synchro.Carrier_phase_rads / GPS_TWO_PI) * lambda - rough_range_m;
@ -5369,7 +5369,7 @@ int Rtcm::set_DF404(const Gnss_Synchro& gnss_synchro)
if ((sig_.compare("2C") == 0) && (sys_.compare("R") == 0))
{
//TODO Need to add slot number and freq number to gnss syncro
lambda = GLONASS_C_m_s / (GLONASS_L2_FREQ_HZ);
lambda = GLONASS_C_m_s / (GLONASS_L2_CA_FREQ_HZ);
}
double rough_phase_range_rate = std::round(-gnss_synchro.Carrier_Doppler_hz * lambda);
double phrr = (-gnss_synchro.Carrier_Doppler_hz * lambda - rough_phase_range_rate);
@ -5456,7 +5456,7 @@ int Rtcm::set_DF406(const Gnss_Synchro& gnss_synchro)
if ((sig_.compare("2C") == 0) && (sys_.compare("R") == 0))
{
//TODO Need to add slot number and freq number to gnss syncro
lambda = GLONASS_C_m_s / (GLONASS_L2_FREQ_HZ);
lambda = GLONASS_C_m_s / (GLONASS_L2_CA_FREQ_HZ);
}
phrng_m = (gnss_synchro.Carrier_phase_rads / GPS_TWO_PI) * lambda - rough_range_m;

2
src/tests/CMakeLists.txt
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@ -282,12 +282,14 @@ if(ENABLE_INSTALL_TESTS)
install(FILES ${CMAKE_SOURCE_DIR}/src/tests/signal_samples/Galileo_E1_ID_1_Fs_4Msps_8ms.dat DESTINATION share/gnss-sdr/signal_samples)
install(FILES ${CMAKE_SOURCE_DIR}/src/tests/signal_samples/GPS_L1_CA_ID_1_Fs_4Msps_2ms.dat DESTINATION share/gnss-sdr/signal_samples)
install(FILES ${CMAKE_SOURCE_DIR}/src/tests/signal_samples/NT1065_GLONASS_L1_20160831_fs6625e6_if0e3_4ms.bin DESTINATION share/gnss-sdr/signal_samples)
install(FILES ${CMAKE_SOURCE_DIR}/src/tests/signal_samples/NT1065_GLONASS_L2_20160831_fs6625e6_if0e3_4ms.bin DESTINATION share/gnss-sdr/signal_samples)
add_definitions(-DTEST_PATH="${CMAKE_INSTALL_PREFIX}/share/gnss-sdr/")
else(ENABLE_INSTALL_TESTS)
file(COPY ${CMAKE_SOURCE_DIR}/src/tests/signal_samples/GSoC_CTTC_capture_2012_07_26_4Msps_4ms.dat DESTINATION ${CMAKE_SOURCE_DIR}/thirdparty/signal_samples)
file(COPY ${CMAKE_SOURCE_DIR}/src/tests/signal_samples/Galileo_E1_ID_1_Fs_4Msps_8ms.dat DESTINATION ${CMAKE_SOURCE_DIR}/thirdparty/signal_samples)
file(COPY ${CMAKE_SOURCE_DIR}/src/tests/signal_samples/GPS_L1_CA_ID_1_Fs_4Msps_2ms.dat DESTINATION ${CMAKE_SOURCE_DIR}/thirdparty/signal_samples)
file(COPY ${CMAKE_SOURCE_DIR}/src/tests/signal_samples/NT1065_GLONASS_L1_20160831_fs6625e6_if0e3_4ms.bin DESTINATION ${CMAKE_SOURCE_DIR}/thirdparty/signal_samples)
file(COPY ${CMAKE_SOURCE_DIR}/src/tests/signal_samples/NT1065_GLONASS_L2_20160831_fs6625e6_if0e3_4ms.bin DESTINATION ${CMAKE_SOURCE_DIR}/thirdparty/signal_samples)
add_definitions(-DTEST_PATH="${CMAKE_SOURCE_DIR}/thirdparty/")
endif(ENABLE_INSTALL_TESTS)

1
src/tests/signal_samples/NT1065_GLONASS_L2_20160831_fs6625e6_if0e3_4ms.bin Normal file
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File diff suppressed because one or more lines are too long

1
src/tests/test_main.cc
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@ -114,6 +114,7 @@ DECLARE_string(log_dir);
#include "unit-tests/signal-processing-blocks/acquisition/galileo_e1_pcps_quicksync_ambiguous_acquisition_gsoc2014_test.cc"
#include "unit-tests/signal-processing-blocks/acquisition/galileo_e5a_pcps_acquisition_gsoc2014_gensource_test.cc"
#include "unit-tests/signal-processing-blocks/acquisition/glonass_l1_ca_pcps_acquisition_gsoc2017_test.cc"
#include "unit-tests/signal-processing-blocks/acquisition/glonass_l2_ca_pcps_acquisition_test.cc"
#if OPENCL_BLOCKS_TEST
#include "unit-tests/signal-processing-blocks/acquisition/gps_l1_ca_pcps_opencl_acquisition_gsoc2013_test.cc"

669
src/tests/unit-tests/signal-processing-blocks/acquisition/glonass_l2_ca_pcps_acquisition_test.cc Normal file
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@ -0,0 +1,669 @@
/*!
* \file glonass_l2_ca_pcps_acquisition_test.cc
* \brief Tests a PCPS acquisition block for Glonass L2 C/A signals
* \author Damian Miralles, 2018, dmiralles2009(at)gmail.com
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (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 <chrono>
#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 <gtest/gtest.h>
#include "gnss_block_interface.h"
#include "in_memory_configuration.h"
#include "configuration_interface.h"
#include "gnss_synchro.h"
#include "glonass_l2_ca_pcps_acquisition.h"
#include "signal_generator.h"
#include "signal_generator_c.h"
#include "fir_filter.h"
#include "gen_signal_source.h"
#include "gnss_sdr_valve.h"
#include "boost/shared_ptr.hpp"
#include "pass_through.h"
// ######## GNURADIO BLOCK MESSAGE RECEVER #########
class GlonassL2CaPcpsAcquisitionTest_msg_rx;
typedef boost::shared_ptr<GlonassL2CaPcpsAcquisitionTest_msg_rx> GlonassL2CaPcpsAcquisitionTest_msg_rx_sptr;
GlonassL2CaPcpsAcquisitionTest_msg_rx_sptr GlonassL2CaPcpsAcquisitionTest_msg_rx_make(concurrent_queue<int>& queue);
class GlonassL2CaPcpsAcquisitionTest_msg_rx : public gr::block
{
private:
friend GlonassL2CaPcpsAcquisitionTest_msg_rx_sptr GlonassL2CaPcpsAcquisitionTest_msg_rx_make(concurrent_queue<int>& queue);
void msg_handler_events(pmt::pmt_t msg);
GlonassL2CaPcpsAcquisitionTest_msg_rx(concurrent_queue<int>& queue);
concurrent_queue<int>& channel_internal_queue;
public:
int rx_message;
~GlonassL2CaPcpsAcquisitionTest_msg_rx(); //!< Default destructor
};
GlonassL2CaPcpsAcquisitionTest_msg_rx_sptr GlonassL2CaPcpsAcquisitionTest_msg_rx_make(concurrent_queue<int>& queue)
{
return GlonassL2CaPcpsAcquisitionTest_msg_rx_sptr(new GlonassL2CaPcpsAcquisitionTest_msg_rx(queue));
}
void GlonassL2CaPcpsAcquisitionTest_msg_rx::msg_handler_events(pmt::pmt_t msg)
{
try
{
long int message = pmt::to_long(msg);
rx_message = message;
channel_internal_queue.push(rx_message);
}
catch (boost::bad_any_cast& e)
{
LOG(WARNING) << "msg_handler_telemetry Bad any cast!";
rx_message = 0;
}
}
GlonassL2CaPcpsAcquisitionTest_msg_rx::GlonassL2CaPcpsAcquisitionTest_msg_rx(concurrent_queue<int>& queue) : gr::block("GlonassL2CaPcpsAcquisitionTest_msg_rx", gr::io_signature::make(0, 0, 0), gr::io_signature::make(0, 0, 0)), channel_internal_queue(queue)
{
this->message_port_register_in(pmt::mp("events"));
this->set_msg_handler(pmt::mp("events"), boost::bind(&GlonassL2CaPcpsAcquisitionTest_msg_rx::msg_handler_events, this, _1));
rx_message = 0;
}
GlonassL2CaPcpsAcquisitionTest_msg_rx::~GlonassL2CaPcpsAcquisitionTest_msg_rx()
{
}
// ###########################################################
class GlonassL2CaPcpsAcquisitionTest : public ::testing::Test
{
protected:
GlonassL2CaPcpsAcquisitionTest()
{
item_size = sizeof(gr_complex);
stop = false;
message = 0;
gnss_synchro = Gnss_Synchro();
acquisition = 0;
init();
}
~GlonassL2CaPcpsAcquisitionTest()
{
}
void init();
void config_1();
void config_2();
void start_queue();
void wait_message();
void process_message();
void stop_queue();
concurrent_queue<int> channel_internal_queue;
gr::msg_queue::sptr queue;
gr::top_block_sptr top_block;
GlonassL2CaPcpsAcquisition* acquisition;
std::shared_ptr<InMemoryConfiguration> config;
Gnss_Synchro gnss_synchro;
size_t item_size;
bool stop;
int message;
boost::thread ch_thread;
unsigned int integration_time_ms = 0;
unsigned int fs_in = 0;
double expected_delay_chips = 0.0;
double expected_doppler_hz = 0.0;
float max_doppler_error_hz = 0.0;
float max_delay_error_chips = 0.0;
unsigned int num_of_realizations = 0;
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 GlonassL2CaPcpsAcquisitionTest::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 GlonassL2CaPcpsAcquisitionTest::config_1()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'R';
std::string signal = "2G";
signal.copy(gnss_synchro.Signal, 2, 0);
integration_time_ms = 1;
fs_in = 31.75e6;
expected_delay_chips = 255;
expected_doppler_hz = -1500;
max_doppler_error_hz = 2 / (3 * integration_time_ms * 1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 1;
config = std::make_shared<InMemoryConfiguration>();
config->set_property("GNSS-SDR.internal_fs_sps", 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", "R");
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", "4000000");
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", "GLONASS_L2_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 GlonassL2CaPcpsAcquisitionTest::config_2()
{
gnss_synchro.Channel_ID = 0;
gnss_synchro.System = 'R';
std::string signal = "2G";
signal.copy(gnss_synchro.Signal, 2, 0);
integration_time_ms = 1;
fs_in = 31.75e6;
expected_delay_chips = 374;
expected_doppler_hz = -2000;
max_doppler_error_hz = 2 / (3 * integration_time_ms * 1e-3);
max_delay_error_chips = 0.50;
num_of_realizations = 100;
config = std::make_shared<InMemoryConfiguration>();
config->set_property("GNSS-SDR.internal_fs_sps", 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", "R");
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", "R");
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", "R");
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", "R");
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", "4000000");
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", "GLONASS_L2_CA_PCPS_Acquisition");
config->set_property("Acquisition.pfa", "0.1");
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 GlonassL2CaPcpsAcquisitionTest::start_queue()
{
stop = false;
ch_thread = boost::thread(&GlonassL2CaPcpsAcquisitionTest::wait_message, this);
}
void GlonassL2CaPcpsAcquisitionTest::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 GlonassL2CaPcpsAcquisitionTest::process_message()
{
if (message == 1)
{
detection_counter++;
// The term -5 is here to correct the additional delay introduced by the FIR filter
// The value 511.0 must be a variable, chips/length
double delay_error_chips = std::abs(static_cast<double>(expected_delay_chips) - (static_cast<double>(gnss_synchro.Acq_delay_samples) - 5.0) * 511.0 / (static_cast<double>(fs_in) * 1e-3));
double doppler_error_hz = std::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(static_cast<float>(realization_counter) / static_cast<float>(num_of_realizations) * 100.0) << "% \r" << std::flush;
if (realization_counter == num_of_realizations)
{
mse_delay /= num_of_realizations;
mse_doppler /= num_of_realizations;
Pd = static_cast<double>(correct_estimation_counter) / static_cast<double>(num_of_realizations);
Pfa_a = static_cast<double>(detection_counter) / static_cast<double>(num_of_realizations);
Pfa_p = (static_cast<double>(detection_counter) - static_cast<double>(correct_estimation_counter)) / static_cast<double>(num_of_realizations);
mean_acq_time_us /= num_of_realizations;
stop_queue();
top_block->stop();
}
}
void GlonassL2CaPcpsAcquisitionTest::stop_queue()
{
stop = true;
}
TEST_F(GlonassL2CaPcpsAcquisitionTest, Instantiate)
{
config_1();
acquisition = new GlonassL2CaPcpsAcquisition(config.get(), "Acquisition", 1, 1);
delete acquisition;
}
TEST_F(GlonassL2CaPcpsAcquisitionTest, ConnectAndRun)
{
int nsamples = floor(fs_in * integration_time_ms * 1e-3);
std::chrono::time_point<std::chrono::system_clock> begin, end;
std::chrono::duration<double> elapsed_seconds(0);
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
config_1();
acquisition = new GlonassL2CaPcpsAcquisition(config.get(), "Acquisition", 1, 1);
boost::shared_ptr<GlonassL2CaPcpsAcquisitionTest_msg_rx> msg_rx = GlonassL2CaPcpsAcquisitionTest_msg_rx_make(channel_internal_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);
top_block->msg_connect(acquisition->get_right_block(), pmt::mp("events"), msg_rx, pmt::mp("events"));
}) << "Failure connecting the blocks of acquisition test.";
EXPECT_NO_THROW({
begin = std::chrono::system_clock::now();
top_block->run(); // Start threads and wait
end = std::chrono::system_clock::now();
elapsed_seconds = end - begin;
}) << "Failure running the top_block.";
std::cout << "Processed " << nsamples << " samples in " << elapsed_seconds.count() * 1e6 << " microseconds" << std::endl;
delete acquisition;
}
TEST_F(GlonassL2CaPcpsAcquisitionTest, ValidationOfResults)
{
config_1();
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
acquisition = new GlonassL2CaPcpsAcquisition(config.get(), "Acquisition", 1, 1);
boost::shared_ptr<GlonassL2CaPcpsAcquisitionTest_msg_rx> msg_rx = GlonassL2CaPcpsAcquisitionTest_msg_rx_make(channel_internal_queue);
ASSERT_NO_THROW({
acquisition->set_channel(1);
}) << "Failure setting channel.";
ASSERT_NO_THROW({
acquisition->set_gnss_synchro(&gnss_synchro);
}) << "Failure setting gnss_synchro.";
ASSERT_NO_THROW({
acquisition->set_doppler_max(10000);
}) << "Failure setting doppler_max.";
ASSERT_NO_THROW({
acquisition->set_doppler_step(500);
}) << "Failure setting doppler_step.";
ASSERT_NO_THROW({
acquisition->set_threshold(0.5);
}) << "Failure setting threshold.";
ASSERT_NO_THROW({
acquisition->connect(top_block);
top_block->msg_connect(acquisition->get_right_block(), pmt::mp("events"), msg_rx, pmt::mp("events"));
}) << "Failure connecting acquisition to the top_block.";
acquisition->init();
ASSERT_NO_THROW({
boost::shared_ptr<GenSignalSource> signal_source;
SignalGenerator* signal_generator = new SignalGenerator(config.get(), "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config.get(), "InputFilter", 1, 1);
signal_source.reset(new GenSignalSource(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.";
// i = 0 --> satellite 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();
acquisition->set_state(1); // Ensure that acquisition starts at the first sample
start_queue();
EXPECT_NO_THROW({
top_block->run(); // Start threads and wait
}) << "Failure running the top_block.";
if (i == 0)
{
EXPECT_EQ(1, message) << "Acquisition failure. Expected message: 1=ACQ SUCCESS.";
if (message == 1)
{
EXPECT_EQ(static_cast<unsigned int>(1), correct_estimation_counter) << "Acquisition failure. Incorrect parameters estimation.";
}
}
else if (i == 1)
{
EXPECT_EQ(2, message) << "Acquisition failure. Expected message: 2=ACQ FAIL.";
}
#ifdef OLD_BOOST
ASSERT_NO_THROW({
ch_thread.timed_join(boost::posix_time::seconds(1));
}) << "Failure while waiting the queue to stop.";
#endif
#ifndef OLD_BOOST
ASSERT_NO_THROW({
ch_thread.try_join_until(boost::chrono::steady_clock::now() + boost::chrono::milliseconds(50));
}) << "Failure while waiting the queue to stop";
#endif
}
delete acquisition;
}
TEST_F(GlonassL2CaPcpsAcquisitionTest, ValidationOfResultsProbabilities)
{
config_2();
queue = gr::msg_queue::make(0);
top_block = gr::make_top_block("Acquisition test");
acquisition = new GlonassL2CaPcpsAcquisition(config.get(), "Acquisition", 1, 1);
boost::shared_ptr<GlonassL2CaPcpsAcquisitionTest_msg_rx> msg_rx = GlonassL2CaPcpsAcquisitionTest_msg_rx_make(channel_internal_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_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);
top_block->msg_connect(acquisition->get_right_block(), pmt::mp("events"), msg_rx, pmt::mp("events"));
}) << "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.get(), "SignalSource", 0, 1, queue);
FirFilter* filter = new FirFilter(config.get(), "InputFilter", 1, 1);
signal_source.reset(new GenSignalSource(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 --> satellite 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 = 1; // This satellite is not visible
}
acquisition->set_local_code();
start_queue();
EXPECT_NO_THROW({
top_block->run(); // Start threads and wait
}) << "Failure running the top_block."
<< std::endl;
if (i == 0)
{
std::cout << "Estimated probability of detection = " << Pd << std::endl;
std::cout << "Estimated 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 << "Estimated probability of false alarm (satellite absent) = " << Pfa_a << std::endl;
std::cout << "Mean acq time = " << mean_acq_time_us << " microseconds." << std::endl;
}
#ifdef OLD_BOOST
ASSERT_NO_THROW({
ch_thread.timed_join(boost::posix_time::seconds(1));
}) << "Failure while waiting the queue to stop"
<< std::endl;
#endif
#ifndef OLD_BOOST
ASSERT_NO_THROW({
ch_thread.try_join_until(boost::chrono::steady_clock::now() + boost::chrono::milliseconds(50));
}) << "Failure while waiting the queue to stop"
<< std::endl;
#endif
}
delete acquisition;
}