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Add plot of correlators\' output

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This commit is contained in:
Carles Fernandez 2017-10-23 19:25:41 +02:00
parent 967e418fcd
commit d1ed8a963c
1 changed files with 66 additions and 12 deletions
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78
src/tests/unit-tests/signal-processing-blocks/tracking/gps_l1_ca_dll_pll_tracking_test.cc
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@ -30,10 +30,12 @@
* -------------------------------------------------------------------------
*/
#include <chrono>
#include <iostream>
#include <unistd.h>
#include <vector>
#include <armadillo>
#include <boost/filesystem.hpp>
#include <gnuradio/top_block.h>
#include <gnuradio/blocks/file_source.h>
#include <gnuradio/analog/sig_source_waveform.h>
@ -53,6 +55,10 @@
#include "tracking_true_obs_reader.h"
#include "tracking_dump_reader.h"
#include "signal_generator_flags.h"
#include "gnuplot_i.h"
#include "test_flags.h"
DEFINE_bool(plot_gps_l1_tracking_test, false, "Plots results of GpsL1CADllPllTrackingTest with gnuplot");
// ######## GNURADIO BLOCK MESSAGE RECEVER #########
@ -358,9 +364,7 @@ TEST_F(GpsL1CADllPllTrackingTest, ValidationOfResults)
generate_signal();
}
struct timeval tv;
long long int begin = 0;
long long int end = 0;
std::chrono::time_point<std::chrono::system_clock> start, end;
configure_receiver();
@ -427,11 +431,9 @@ TEST_F(GpsL1CADllPllTrackingTest, ValidationOfResults)
tracking->start_tracking();
EXPECT_NO_THROW( {
gettimeofday(&tv, NULL);
begin = tv.tv_sec * 1000000 + tv.tv_usec;
start = std::chrono::system_clock::now();
top_block->run(); // Start threads and wait
gettimeofday(&tv, NULL);
end = tv.tv_sec * 1000000 + tv.tv_usec;
end = std::chrono::system_clock::now();
}) << "Failure running the top_block." << std::endl;
//check results
@ -461,7 +463,7 @@ TEST_F(GpsL1CADllPllTrackingTest, ValidationOfResults)
ASSERT_NO_THROW({
if (trk_dump.open_obs_file(std::string("./tracking_ch_0.dat")) == false)
{
throw std::exception();
};
}) << "Failure opening tracking dump file" << std::endl;
@ -473,7 +475,11 @@ TEST_F(GpsL1CADllPllTrackingTest, ValidationOfResults)
arma::vec trk_acc_carrier_phase_cycles = arma::zeros(nepoch, 1);
arma::vec trk_Doppler_Hz = arma::zeros(nepoch, 1);
arma::vec trk_prn_delay_chips = arma::zeros(nepoch, 1);
std::vector<double> prompt;
std::vector<double> early;
std::vector<double> late;
epoch_counter = 0;
while(trk_dump.read_binary_obs())
{
@ -486,6 +492,9 @@ TEST_F(GpsL1CADllPllTrackingTest, ValidationOfResults)
trk_prn_delay_chips(epoch_counter) = delay_chips;
epoch_counter++;
prompt.push_back(trk_dump.abs_P);
early.push_back(trk_dump.abs_E);
late.push_back(trk_dump.abs_L);
}
//Align initial measurements and cut the tracking pull-in transitory
@ -501,6 +510,51 @@ TEST_F(GpsL1CADllPllTrackingTest, ValidationOfResults)
check_results_codephase(true_timestamp_s, true_prn_delay_chips, trk_timestamp_s, trk_prn_delay_chips);
check_results_acc_carrier_phase(true_timestamp_s, true_acc_carrier_phase_cycles, trk_timestamp_s, trk_acc_carrier_phase_cycles);
std::cout << "Signal tracking completed in " << (end - begin) << " microseconds" << std::endl;
}
std::chrono::duration<double> elapsed_seconds = end - start;
std::cout << "Signal tracking completed in " << elapsed_seconds.count() * 1e6 << " microseconds" << std::endl;
if(FLAGS_plot_gps_l1_tracking_test == true)
{
const std::string gnuplot_executable(FLAGS_gnuplot_executable);
if(gnuplot_executable.empty())
{
std::cout << "WARNING: Although the flag plot_gps_l1_tracking_test has been set to TRUE," << std::endl;
std::cout << "gnuplot has not been found in your system." << std::endl;
std::cout << "Test results will not be plotted." << std::endl;
}
else
{
try
{
boost::filesystem::path p(gnuplot_executable);
boost::filesystem::path dir = p.parent_path();
std::string gnuplot_path = dir.native();
Gnuplot::set_GNUPlotPath(gnuplot_path);
std::vector<double> timevec;
//sample_interval = (1 / baseband_sampling_freq)
double t = 0.0;
for (auto it = prompt.begin(); it != prompt.end(); it++)
{
timevec.push_back(t);
t = t + GPS_L1_CA_CODE_PERIOD;
}
Gnuplot g1("linespoints");
g1.set_title("GPS L1 C/A signal tracking for satellite " + std::to_string(FLAGS_test_satellite_PRN));
g1.set_grid();
g1.set_xlabel("Time [s]");
g1.set_ylabel("Correlators output");
g1.plot_xy( timevec, prompt, "Prompt");
g1.plot_xy( timevec, early, "Early");
g1.plot_xy( timevec, late, "Late");
g1.savetops("Correlators_outputs");
g1.savetopdf("Correlators_outputs", 18);
g1.showonscreen(); // window output
}
catch (GnuplotException ge)
{
std::cout << ge.what() << std::endl;
}
}
}
}