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Adding new advanced features to Galileo E1 tracking: Pilot tracking, Extended coherent correlation, narrow DLL/PLL bandwidth and narrow correlator spacings

This commit is contained in:
Javier Arribas 2018-01-10 12:37:13 +01:00
parent c463456924
commit 0e9113fdcb
5 changed files with 1200 additions and 401 deletions
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269
conf/gnss-sdr_galileo_E1_extended_correlator_byte.conf Normal file
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@ -0,0 +1,269 @@
; Default configuration file
; You can define your own receiver and invoke it by doing
; gnss-sdr --config_file=my_GNSS_SDR_configuration.conf
;
[GNSS-SDR]
;######### GLOBAL OPTIONS ##################
;internal_fs_sps: Internal signal sampling frequency after the signal conditioning stage [samples per second].
GNSS-SDR.internal_fs_sps=20000000
;######### SIGNAL_SOURCE CONFIG ############
;#implementation: Use [File_Signal_Source] or [UHD_Signal_Source] or [GN3S_Signal_Source] (experimental)
SignalSource.implementation=File_Signal_Source
;#filename: path to file with the captured GNSS signal samples to be processed
;SignalSource.filename=/home/javier/signals/L125_III1b_210s_L1_2msps.bin ; <- PUT YOUR FILE HERE
SignalSource.filename=/media/javier/SISTEMA/signals/fraunhofer/L125_III1b_210s_L1.bin
;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
SignalSource.item_type=byte
;#sampling_frequency: Original Signal sampling frequency in [Hz]
SignalSource.sampling_frequency=20000000
;#freq: RF front-end center frequency in [Hz]
SignalSource.freq=1575420000
;#samples: Number of samples to be processed. Notice that 0 indicates the entire file.
SignalSource.samples=0
;#repeat: Repeat the processing file. Disable this option in this version
SignalSource.repeat=false
;#dump: Dump the Signal source data to a file. Disable this option in this version
SignalSource.dump=false
SignalSource.dump_filename=../data/signal_source.dat
;#enable_throttle_control: Enabling this option tells the signal source to keep the delay between samples in post processing.
; it helps to not overload the CPU, but the processing time will be longer.
SignalSource.enable_throttle_control=false
;######### SIGNAL_CONDITIONER CONFIG ############
;## It holds blocks to change data type, filter and resample input data.
;#implementation: Use [Pass_Through] or [Signal_Conditioner]
;#[Pass_Through] disables this block and the [DataTypeAdapter], [InputFilter] and [Resampler] blocks
;#[Signal_Conditioner] enables this block. Then you have to configure [DataTypeAdapter], [InputFilter] and [Resampler] blocks
SignalConditioner.implementation=Signal_Conditioner
;######### DATA_TYPE_ADAPTER CONFIG ############
;## Changes the type of input data. Please disable it in this version.
;#implementation: [Pass_Through] disables this block
DataTypeAdapter.implementation=Ibyte_To_Complex
;######### INPUT_FILTER CONFIG ############
;## Filter the input data. Can be combined with frequency translation for IF signals
InputFilter.implementation=Pass_Through
;######### RESAMPLER CONFIG ############
;## Resamples the input data.
;#implementation: Use [Pass_Through] or [Direct_Resampler]
;#[Pass_Through] disables this block
;#[Direct_Resampler] enables a resampler that implements a nearest neigbourhood interpolation
;Resampler.implementation=Direct_Resampler
Resampler.implementation=Pass_Through
;######### CHANNELS GLOBAL CONFIG ############
;#count: Number of available GPS satellite channels.
Channels_1C.count=0
;#count: Number of available Galileo satellite channels.
Channels_1B.count=1
;#in_acquisition: Number of channels simultaneously acquiring for the whole receiver
Channels.in_acquisition=1
;#signal:
;#if the option is disabled by default is assigned "1C" GPS L1 C/A
Channel1.signal=1B
Channel2.signal=1B
Channel3.signal=1B
Channel4.signal=1B
Channel5.signal=1B
Channel6.signal=1B
Channel7.signal=1B
Channel8.signal=1B
Channel9.signal=1B
Channel10.signal=1B
Channel11.signal=1B
Channel12.signal=1B
Channel13.signal=1B
Channel14.signal=1B
Channel15.signal=1B
;######### GPS ACQUISITION CONFIG ############
;#dump: Enable or disable the acquisition internal data file logging [true] or [false]
Acquisition_1C.dump=false
;#filename: Log path and filename
Acquisition_1C.dump_filename=./acq_dump.dat
;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
Acquisition_1C.item_type=gr_complex
;#if: Signal intermediate frequency in [Hz]
Acquisition_1C.if=0
;#sampled_ms: Signal block duration for the acquisition signal detection [ms]
Acquisition_1C.sampled_ms=1
;#implementation: Acquisition algorithm selection for this channel: [GPS_L1_CA_PCPS_Acquisition] or [Galileo_E1_PCPS_Ambiguous_Acquisition]
Acquisition_1C.implementation=GPS_L1_CA_PCPS_Acquisition
Acquisition_1C.use_CFAR_algorithm=false;
;#threshold: Acquisition threshold
Acquisition_1C.threshold=18
;#doppler_max: Maximum expected Doppler shift [Hz]
Acquisition_1C.doppler_max=5000
;#doppler_max: Doppler step in the grid search [Hz]
Acquisition_1C.doppler_step=500
;######### GALILEO ACQUISITION CONFIG ############
;#dump: Enable or disable the acquisition internal data file logging [true] or [false]
Acquisition_1B.dump=false
;#filename: Log path and filename
Acquisition_1B.dump_filename=../data/acq_dump.dat
;#item_type: Type and resolution for each of the signal samples. Use only gr_complex in this version.
Acquisition_1B.item_type=gr_complex
;#if: Signal intermediate frequency in [Hz]
Acquisition_1B.if=0
;#sampled_ms: Signal block duration for the acquisition signal detection [ms]
Acquisition_1B.sampled_ms=4
;#implementation: Acquisition algorithm selection for this channel: [GPS_L1_CA_PCPS_Acquisition] or [Galileo_E1_PCPS_Ambiguous_Acquisition]
Acquisition_1B.implementation=Galileo_E1_PCPS_Ambiguous_Acquisition
Acquisition_1B.acquire_pilot=true
Acquisition_1B.use_CFAR_algorithm=false
;#threshold: Acquisition threshold
Acquisition_1B.threshold=21
;#doppler_max: Maximum expected Doppler shift [Hz]
Acquisition_1B.doppler_max=5000
;#doppler_max: Doppler step in the grid search [Hz]
Acquisition_1B.doppler_step=125
Acquisition_1B.bit_transition_flag=true
;######### TRACKING GPS CONFIG ############
;#implementation: Selected tracking algorithm: [GPS_L1_CA_DLL_PLL_Tracking] or [GPS_L1_CA_DLL_PLL_C_Aid_Tracking] or [GPS_L1_CA_TCP_CONNECTOR_Tracking] or [Galileo_E1_DLL_PLL_VEML_Tracking]
Tracking_1C.implementation=GPS_L1_CA_DLL_PLL_Tracking
;#item_type: Type and resolution for each of the signal samples. Use only [gr_complex] in this version.
Tracking_1C.item_type=gr_complex
;#sampling_frequency: Signal Intermediate Frequency in [Hz]
Tracking_1C.if=0
;#dump: Enable or disable the Tracking internal binary data file logging [true] or [false]
Tracking_1C.dump=false
;#dump_filename: Log path and filename. Notice that the tracking channel will add "x.dat" where x is the channel number.
Tracking_1C.dump_filename=../data/epl_tracking_ch_
;#pll_bw_hz: PLL loop filter bandwidth [Hz]
Tracking_1C.pll_bw_hz=30.0;
;#dll_bw_hz: DLL loop filter bandwidth [Hz]
Tracking_1C.dll_bw_hz=2.0;
;#order: PLL/DLL loop filter order [2] or [3]
Tracking_1C.order=3;
;######### TRACKING GALILEO CONFIG ############
;#implementation: Selected tracking algorithm: [GPS_L1_CA_DLL_PLL_Tracking] or [GPS_L1_CA_DLL_PLL_C_Aid_Tracking] or [GPS_L1_CA_TCP_CONNECTOR_Tracking] or [Galileo_E1_DLL_PLL_VEML_Tracking]
Tracking_1B.implementation=Galileo_E1_DLL_PLL_VEML_Tracking
;#item_type: Type and resolution for each of the signal samples.
Tracking_1B.item_type=gr_complex
;#sampling_frequency: Signal Intermediate Frequency in [Hz]
Tracking_1B.if=0
;#dump: Enable or disable the Tracking internal binary data file logging [true] or [false]
Tracking_1B.dump=true
;#dump_filename: Log path and filename. Notice that the tracking channel will add "x.dat" where x is the channel number.
Tracking_1B.dump_filename=../data/veml_tracking_ch_
Tracking_1B.track_pilot=true
;#pll_bw_hz: PLL loop filter bandwidth [Hz]
Tracking_1B.pll_bw_hz=4.0;
;#dll_bw_hz: DLL loop filter bandwidth [Hz]
Tracking_1B.dll_bw_hz=0.5;
;#pll_bw_hz: PLL loop filter bandwidth [Hz]
Tracking_1B.pll_bw_narrow_hz=2.0;
;#dll_bw_hz: DLL loop filter bandwidth [Hz]
Tracking_1B.dll_bw_narrow_hz=0.25;
Tracking_1B.extend_correlation_symbols=4;
;#order: PLL/DLL loop filter order [2] or [3]
Tracking_1B.order=3;
;#early_late_space_chips: correlator early-late space [chips]. Use [0.5] for GPS and [0.15] for Galileo
Tracking_1B.early_late_space_chips=0.15;
;#very_early_late_space_chips: only for [Galileo_E1_DLL_PLL_VEML_Tracking], correlator very early-late space [chips]. Use [0.6]
Tracking_1B.very_early_late_space_chips=0.6;
;#early_late_space_chips: correlator early-late space [chips]. Use [0.5] for GPS and [0.15] for Galileo
Tracking_1B.early_late_space_narrow_chips=0.06;
;#very_early_late_space_chips: only for [Galileo_E1_DLL_PLL_VEML_Tracking], correlator very early-late space [chips]. Use [0.6]
Tracking_1B.very_early_late_space_narrow_chips=0.25;
;######### TELEMETRY DECODER GPS CONFIG ############
;#implementation: Use [GPS_L1_CA_Telemetry_Decoder] for GPS L1 C/A
TelemetryDecoder_1C.implementation=GPS_L1_CA_Telemetry_Decoder
TelemetryDecoder_1C.dump=false
;#decimation factor
TelemetryDecoder_1C.decimation_factor=4;
;######### TELEMETRY DECODER GALILEO CONFIG ############
;#implementation: Use [Galileo_E1B_Telemetry_Decoder] for Galileo E1B
TelemetryDecoder_1B.implementation=Galileo_E1B_Telemetry_Decoder
TelemetryDecoder_1B.dump=false
;######### OBSERVABLES CONFIG ############
;#implementation:
Observables.implementation=Hybrid_Observables
;#dump: Enable or disable the Observables internal binary data file logging [true] or [false]
Observables.dump=false
;#dump_filename: Log path and filename.
Observables.dump_filename=./observables.dat
;######### PVT CONFIG ############
;#implementation: Position Velocity and Time (PVT) implementation:
PVT.implementation=RTKLIB_PVT
PVT.positioning_mode=PPP_Static ; options: Single, Static, Kinematic, PPP_Static, PPP_Kinematic
PVT.iono_model=Broadcast ; options: OFF, Broadcast, SBAS, Iono-Free-LC, Estimate_STEC, IONEX
PVT.trop_model=Saastamoinen ; options: OFF, Saastamoinen, SBAS, Estimate_ZTD, Estimate_ZTD_Grad
;#output_rate_ms: Period between two PVT outputs. Notice that the minimum period is equal to the tracking integration time (for GPS CA L1 is 1ms) [ms]
PVT.output_rate_ms=100;
;#display_rate_ms: Position console print (std::out) interval [ms]. Notice that output_rate_ms<=display_rate_ms.
PVT.display_rate_ms=500;
;#dump: Enable or disable the PVT internal binary data file logging [true] or [false]
PVT.dump=false
PVT.flag_rtcm_server=false
PVT.flag_rtcm_tty_port=false
PVT.rtcm_dump_devname=/dev/pts/1
;#dump_filename: Log path and filename without extension. Notice that PVT will add ".dat" to the binary dump and ".kml" to GoogleEarth dump.
PVT.dump_filename=./PVT

34
src/algorithms/tracking/adapters/galileo_e1_dll_pll_veml_tracking.cc
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@ -57,19 +57,31 @@ GalileoE1DllPllVemlTracking::GalileoE1DllPllVemlTracking(
std::string item_type;
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;
float very_early_late_space_chips;
float early_late_space_narrow_chips;
float very_early_late_space_narrow_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);
dll_bw_hz = configuration->property(role + ".dll_bw_hz", 2.0);
pll_bw_hz = configuration->property(role + ".pll_bw_hz", 5.0);
dll_bw_hz = configuration->property(role + ".dll_bw_hz", 0.5);
pll_bw_narrow_hz = configuration->property(role + ".pll_bw_narrow_hz", 2.0);
dll_bw_narrow_hz = configuration->property(role + ".dll_bw_narrow_hz", 0.25);
int extend_correlation_symbols;
extend_correlation_symbols = configuration->property(role + ".extend_correlation_symbols", 1);
early_late_space_chips = configuration->property(role + ".early_late_space_chips", 0.15);
very_early_late_space_chips = configuration->property(role + ".very_early_late_space_chips", 0.6);
early_late_space_narrow_chips = configuration->property(role + ".early_late_space_narrow_chips", 0.15);
very_early_late_space_narrow_chips = configuration->property(role + ".very_early_late_space_narrow_chips", 0.6);
bool track_pilot=configuration->property(role + ".track_pilot", false);
std::string default_dump_filename = "./track_ch";
dump_filename = configuration->property(role + ".dump_filename",
@ -88,8 +100,24 @@ GalileoE1DllPllVemlTracking::GalileoE1DllPllVemlTracking(
dump_filename,
pll_bw_hz,
dll_bw_hz,
pll_bw_narrow_hz,
dll_bw_narrow_hz,
early_late_space_chips,
very_early_late_space_chips);
very_early_late_space_chips,
early_late_space_narrow_chips,
very_early_late_space_narrow_chips,
extend_correlation_symbols,
track_pilot);
// tracking_ = galileo_e1_dll_pll_veml_make_tracking_cc(
// f_if,
// fs_in,
// vector_length,
// dump,
// dump_filename,
// pll_bw_hz,
// dll_bw_hz,
// early_late_space_chips,
// very_early_late_space_chips);
}
else
{

1212
src/algorithms/tracking/gnuradio_blocks/galileo_e1_dll_pll_veml_tracking_cc.cc
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84
src/algorithms/tracking/gnuradio_blocks/galileo_e1_dll_pll_veml_tracking_cc.h
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@ -53,8 +53,14 @@ galileo_e1_dll_pll_veml_make_tracking_cc(long if_freq,
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
float early_late_space_chips,
float very_early_late_space_chips);
float very_early_late_space_chips,
float early_late_space_narrow_chips,
float very_early_late_space_narrow_chips,
int extend_correlation_symbols,
bool track_pilot);
/*!
* \brief This class implements a code DLL + carrier PLL VEML (Very Early
@ -88,8 +94,14 @@ private:
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
float early_late_space_chips,
float very_early_late_space_chips);
float very_early_late_space_chips,
float early_late_space_narrow_chips,
float very_early_late_space_narrow_chips,
int extend_correlation_symbols,
bool track_pilot);
galileo_e1_dll_pll_veml_tracking_cc(long if_freq,
long fs_in, unsigned
@ -98,12 +110,25 @@ private:
std::string dump_filename,
float pll_bw_hz,
float dll_bw_hz,
float pll_bw_narrow_hz,
float dll_bw_narrow_hz,
float early_late_space_chips,
float very_early_late_space_chips);
float very_early_late_space_chips,
float early_late_space_narrow_chips,
float very_early_late_space_narrow_chips,
int extend_correlation_symbols,
bool track_pilot);
bool cn0_and_tracking_lock_status();
void do_correlation_step(const gr_complex* input_samples);
void run_dll_pll(bool disable_costas_loop);
void update_local_code();
void update_local_carrier();
bool acquire_secondary();
void clear_tracking_vars();
void log_data();
// tracking configuration vars
unsigned int d_vector_length;
@ -114,16 +139,29 @@ private:
long d_if_freq;
long d_fs_in;
//tracking state machine
int d_state;
//Integration period in samples
int d_correlation_length_samples;
int d_n_correlator_taps;
double d_early_late_spc_chips;
double d_very_early_late_spc_chips;
float* d_ca_code;
double d_early_late_spc_narrow_chips;
double d_very_early_late_spc_narrow_chips;
float* d_tracking_code;
float* d_data_code;
float* d_local_code_shift_chips;
gr_complex* d_correlator_outs;
cpu_multicorrelator_real_codes multicorrelator_cpu;
//todo: currently the multicorrelator does not support adding extra correlator
//with different local code, thus we need extra multicorrelator instance.
//Implement this functionality inside multicorrelator class
//as an enhancement to increase the performance
float* d_local_code_data_shift_chips;
cpu_multicorrelator_real_codes correlator_data_cpu; //for data channel
gr_complex *d_Very_Early;
gr_complex *d_Early;
@ -131,6 +169,22 @@ private:
gr_complex *d_Late;
gr_complex *d_Very_Late;
int d_extend_correlation_symbols;
int d_extend_correlation_symbols_count;
bool d_enable_extended_integration;
int d_current_symbol;
gr_complex d_VE_accu;
gr_complex d_E_accu;
gr_complex d_P_accu;
gr_complex d_L_accu;
gr_complex d_VL_accu;
bool d_track_pilot;
gr_complex *d_Prompt_Data;
double d_code_phase_step_chips;
double d_carrier_phase_step_rad;
// remaining code phase and carrier phase between tracking loops
double d_rem_code_phase_samples;
double d_rem_carr_phase_rad;
@ -143,11 +197,24 @@ private:
double d_acq_code_phase_samples;
double d_acq_carrier_doppler_hz;
// tracking parameters
float d_dll_bw_hz;
float d_pll_bw_hz;
float d_dll_bw_narrow_hz;
float d_pll_bw_narrow_hz;
// tracking vars
double d_carr_error_hz;
double d_carr_error_filt_hz;
double d_code_error_chips;
double d_code_error_filt_chips;
double d_K_blk_samples;
double d_code_freq_chips;
double d_carrier_doppler_hz;
double d_acc_carrier_phase_rad;
double d_acc_code_phase_secs;
double d_rem_code_phase_chips;
double d_code_phase_samples;
//PRN period in samples
int d_current_prn_length_samples;
@ -158,16 +225,13 @@ private:
// CN0 estimation and lock detector
int d_cn0_estimation_counter;
std::deque<gr_complex> d_Prompt_buffer_deque;
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;

2
src/core/system_parameters/Galileo_E1.h
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@ -57,7 +57,7 @@ const double Galileo_E1_SUB_CARRIER_A_RATE_HZ = 1.023e6; //!< Galileo E1 sub-car
const double Galileo_E1_SUB_CARRIER_B_RATE_HZ = 6.138e6; //!< Galileo E1 sub-carrier 'b' rate [Hz]
const double Galileo_E1_B_CODE_LENGTH_CHIPS = 4092.0; //!< Galileo E1-B code length [chips]
const double Galileo_E1_B_SYMBOL_RATE_BPS = 250.0; //!< Galileo E1-B symbol rate [bits/second]
const double Galileo_E1_C_SECONDARY_CODE_LENGTH = 25.0; //!< Galileo E1-C secondary code length [chips]
const int Galileo_E1_C_SECONDARY_CODE_LENGTH = 25; //!< Galileo E1-C secondary code length [chips]
const int Galileo_E1_NUMBER_OF_CODES = 50;
const double GALILEO_STARTOFFSET_ms = 68.802; //[ms] Initial sign. travel time (this cannot go here)