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Debug Build: Measuring signal timestamp vs. GNSS obs RX time

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This commit is contained in:
Javier Arribas 2021-04-12 18:37:06 +02:00
parent 3353a62296
commit 26bc9c9b5a
6 changed files with 84 additions and 34 deletions
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32
src/algorithms/libs/gnss_time.h
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@ -1,44 +1,26 @@
/* -------------------------------------------------------------------------
*
* Copyright (C) 2019 (see AUTHORS file for a list of contributors)
* Copyright (C) 2021 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR-SIM is a software defined Global Navigation
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems Simulator
*
* This file is part of GNSS-SDR-SIM.
* This file is part of GNSS-SDR.
*
*/
#ifndef GNSS_SDR_SIM_GNSS_TIME_H
#define GNSS_SDR_SIM_GNSS_TIME_H
#ifndef GNSS_SDR_GNSS_TIME_H
#define GNSS_SDR_GNSS_TIME_H
#include <boost/serialization/nvp.hpp>
#include <cstdint>
#include <time.h>
class GnssTime
{
public:
//time_t time; /* time (s) expressed by standard time_t */
int week; /*!< GPS week number (since January 1980) */
//double sec; /*!< second inside the GPS \a week */
double rx_time;
int week; /*!< GPS week number (since January 1980) */
int tow_ms; /* time of week [ms]*/
double tow_ms_fraction; /* tow ms fractional part [ms]*/
template <class Archive>
/*!
* \brief Serialize is a boost standard method to be called by the boost XML serialization. Here is used to save the ephemeris data on disk file.
*/
inline void serialize(Archive& archive, const uint32_t version)
{
using boost::serialization::make_nvp;
if (version)
{
};
archive& make_nvp("week", week);
archive& make_nvp("tow_ms", tow_ms);
};
};
#endif

62
src/algorithms/observables/gnuradio_blocks/hybrid_observables_gs.cc
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@ -128,6 +128,8 @@ hybrid_observables_gs::hybrid_observables_gs(const Obs_Conf &conf_) : gr::block(
d_channel_last_pseudorange_smooth = std::vector<double>(d_nchannels_out, 0.0);
d_channel_last_carrier_phase_rads = std::vector<double>(d_nchannels_out, 0.0);
d_SourceTagTimestamps = std::vector<std::queue<GnssTime>>(d_nchannels_out);
d_smooth_filter_M = static_cast<double>(conf_.smoothing_factor);
d_mapStringValues["1C"] = evGPS_1C;
d_mapStringValues["2S"] = evGPS_2S;
@ -601,6 +603,37 @@ void hybrid_observables_gs::smooth_pseudoranges(std::vector<Gnss_Synchro> &data)
}
}
void hybrid_observables_gs::check_tag_timestamp(const std::vector<Gnss_Synchro> &data, uint64_t rx_clock)
{
std::vector<Gnss_Synchro>::const_iterator it;
for (it = data.begin(); it != data.end(); it++)
{
if (!d_SourceTagTimestamps[it->Channel_ID].empty() and it->Flag_valid_pseudorange == true)
{
//std::cout << "RX Time: " << (static_cast<double>(rx_clock) / static_cast<double>(it->fs)) << "s\n";
double delta_rxtime_to_tag;
GnssTime current_tag;
do
{
current_tag = d_SourceTagTimestamps[it->Channel_ID].front();
delta_rxtime_to_tag = (static_cast<double>(rx_clock) / static_cast<double>(it->fs)) - current_tag.rx_time;
// std::cout << "[ch:" << it->Channel_ID << "][" << delta_rxtime_to_tag << "]\n";
d_SourceTagTimestamps[it->Channel_ID].pop();
}
while (fabs(delta_rxtime_to_tag) >= 0.05 and !d_SourceTagTimestamps[it->Channel_ID].empty());
if (fabs(delta_rxtime_to_tag) <= 0.05)
{
std::cout << "[ch:" << it->Channel_ID << "][" << delta_rxtime_to_tag
<< "] OBS RX TimeTag Week: " << current_tag.week
<< ", TOW: " << current_tag.tow_ms
<< " [ms], TOW fraction: " << current_tag.tow_ms_fraction
<< " [ms], DELTA TLM TOW: " << delta_rxtime_to_tag * 1000.0 + static_cast<double>(current_tag.tow_ms) - it->RX_time * 1000.0 + current_tag.tow_ms_fraction << " [ms] \n";
}
}
}
}
int hybrid_observables_gs::general_work(int noutput_items __attribute__((unused)),
gr_vector_int &ninput_items, gr_vector_const_void_star &input_items,
@ -621,9 +654,34 @@ int hybrid_observables_gs::general_work(int noutput_items __attribute__((unused)
// Push the tracking observables into buffers to allow the observable interpolation at the desired Rx clock
for (uint32_t n = 0; n < d_nchannels_out; n++)
{
// Push the valid tracking Gnss_Synchros to their corresponding deque
//**************** time tags ****************
std::vector<gr::tag_t> tags_vec;
this->get_tags_in_range(tags_vec, n, this->nitems_read(n), this->nitems_read(n) + ninput_items[n]);
for (std::vector<gr::tag_t>::iterator it = tags_vec.begin(); it != tags_vec.end(); ++it)
{
try
{
if (pmt::any_ref(it->value).type().hash_code() == typeid(const std::shared_ptr<GnssTime>).hash_code())
{
const std::shared_ptr<GnssTime> timetag = boost::any_cast<const std::shared_ptr<GnssTime>>(pmt::any_ref(it->value));
//std::cout << "[ch " << n << "] timetag: " << timetag->rx_time << "\n";
d_SourceTagTimestamps.at(n).push(*timetag);
}
else
{
std::cout << "hash code not match\n";
}
}
catch (const boost::bad_any_cast &e)
{
std::cout << "msg Bad any_cast: " << e.what();
}
}
//************* end time tags **************
for (int32_t m = 0; m < ninput_items[n]; m++)
{
// Push the valid tracking Gnss_Synchros to their corresponding deque
if (in[n][m].Flag_valid_word)
{
if (d_gnss_synchro_history->size(n) > 0)
@ -681,6 +739,7 @@ int hybrid_observables_gs::general_work(int noutput_items __attribute__((unused)
if (n_valid > 0)
{
compute_pranges(epoch_data);
check_tag_timestamp(epoch_data, d_Rx_clock_buffer.front());
}
// Carrier smoothing (optional)
@ -688,6 +747,7 @@ int hybrid_observables_gs::general_work(int noutput_items __attribute__((unused)
{
smooth_pseudoranges(epoch_data);
}
// output the observables set to the PVT block
for (uint32_t n = 0; n < d_nchannels_out; n++)
{

12
src/algorithms/observables/gnuradio_blocks/hybrid_observables_gs.h
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@ -21,6 +21,7 @@
#define GNSS_SDR_HYBRID_OBSERVABLES_GS_H
#include "gnss_block_interface.h"
#include "gnss_time.h" //for timetags produced by Tracking
#include "obs_conf.h"
#include <boost/circular_buffer.hpp> // for boost::circular_buffer
#include <gnuradio/block.h> // for block
@ -30,9 +31,10 @@
#include <fstream> // for std::ofstream
#include <map> // for std::map
#include <memory> // for std::shared, std:unique_ptr
#include <string> // for std::string
#include <typeinfo> // for typeid
#include <vector> // for std::vector
#include <queue>
#include <string> // for std::string
#include <typeinfo> // for typeid
#include <vector> // for std::vector
/** \addtogroup Observables
* \{ */
@ -75,6 +77,8 @@ private:
void update_TOW(const std::vector<Gnss_Synchro>& data);
void compute_pranges(std::vector<Gnss_Synchro>& data) const;
void smooth_pseudoranges(std::vector<Gnss_Synchro>& data);
void check_tag_timestamp(const std::vector<Gnss_Synchro>& data, uint64_t rx_clock);
int32_t save_matfile() const;
Obs_Conf d_conf;
@ -101,6 +105,8 @@ private:
boost::circular_buffer<uint64_t> d_Rx_clock_buffer; // time history
std::vector<std::queue<GnssTime>> d_SourceTagTimestamps;
std::vector<bool> d_channel_last_pll_lock;
std::vector<double> d_channel_last_pseudorange_smooth;
std::vector<double> d_channel_last_carrier_phase_rads;

3
src/algorithms/signal_source/libs/gnss_sdr_timestamp.cc
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@ -110,8 +110,9 @@ int Gnss_Sdr_Timestamp::work(int noutput_items,
tmp_obj->tow_ms = next_timetag.tow_ms;
tmp_obj->week = next_timetag.week;
tmp_obj->tow_ms_fraction = 0;
tmp_obj->rx_time = 0;
add_item_tag(ch, this->nitems_written(ch) - diff_samplecount, pmt::mp("timetag"), pmt::make_any(tmp_obj));
std::cout << "[" << this->nitems_written(ch) - diff_samplecount << "] Sent TimeTag SC: " << next_timetag_samplecount * bytes_to_samples << ", Week: " << next_timetag.week << ", TOW: " << next_timetag.tow_ms << " [ms] \n";
//std::cout << "[" << this->nitems_written(ch) - diff_samplecount << "] Sent TimeTag SC: " << next_timetag_samplecount * bytes_to_samples << ", Week: " << next_timetag.week << ", TOW: " << next_timetag.tow_ms << " [ms] \n";
get_next_timetag = true;
}
}

5
src/algorithms/telemetry_decoder/gnuradio_blocks/gps_l1_ca_telemetry_decoder_gs.cc
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@ -532,8 +532,9 @@ int gps_l1_ca_telemetry_decoder_gs::general_work(int noutput_items __attribute__
if (pmt::any_ref(it->value).type().hash_code() == typeid(const std::shared_ptr<GnssTime>).hash_code())
{
const std::shared_ptr<GnssTime> timetag = boost::any_cast<const std::shared_ptr<GnssTime>>(pmt::any_ref(it->value));
std::cout << "[" << this->nitems_written(0) + 1 << "] TLM RX TimeTag Week: " << timetag->week << ", TOW: " << timetag->tow_ms << " [ms], TOW fraction: " << timetag->tow_ms_fraction
<< " [ms], DELTA TLM TOW: " << static_cast<double>(timetag->tow_ms - current_symbol.TOW_at_current_symbol_ms) + timetag->tow_ms_fraction << " [ms] \n";
// std::cout << "[" << this->nitems_written(0) + 1 << "] TLM RX TimeTag Week: " << timetag->week << ", TOW: " << timetag->tow_ms << " [ms], TOW fraction: " << timetag->tow_ms_fraction
// << " [ms], DELTA TLM TOW: " << static_cast<double>(timetag->tow_ms - current_symbol.TOW_at_current_symbol_ms) + timetag->tow_ms_fraction << " [ms] \n";
add_item_tag(0, this->nitems_written(0) + 1, pmt::mp("timetag"), pmt::make_any(timetag));
}
else
{

4
src/algorithms/tracking/gnuradio_blocks/dll_pll_veml_tracking.cc
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@ -2047,10 +2047,10 @@ int dll_pll_veml_tracking::general_work(int noutput_items __attribute__((unused)
tmp_obj->week = d_last_timetag.week;
tmp_obj->tow_ms = d_last_timetag.tow_ms + static_cast<int>(intpart);
tmp_obj->tow_ms_fraction = d_last_timetag.tow_ms_fraction;
tmp_obj->rx_time = static_cast<double>(current_synchro_data.Tracking_sample_counter) / d_trk_parameters.fs_in;
add_item_tag(0, this->nitems_written(0) + 1, pmt::mp("timetag"), pmt::make_any(tmp_obj));
std::cout << "[" << this->nitems_written(0) + 1 << "] Sent TimeTag Week: " << d_last_timetag.week << ", TOW: " << d_last_timetag.tow_ms << " [ms], TOW fraction: " << d_last_timetag.tow_ms_fraction << " [ms] \n";
//std::cout << "[" << this->nitems_written(0) + 1 << "] Sent TimeTag Week: " << d_last_timetag.week << ", TOW: " << d_last_timetag.tow_ms << " [ms], TOW fraction: " << d_last_timetag.tow_ms_fraction << " [ms] \n";
d_timetag_waiting = false;
}