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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

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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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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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File diff suppressed because it is too large Load Diff

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;