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Add FDMA protocol to pcps algorithm

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This commit is contained in:
Gastd
2017-06-05 20:22:46 -03:00
parent e5e4e25333
commit 2091ac354a
3 changed files with 27 additions and 12 deletions
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6
src/algorithms/acquisition/adapters/glonass_l1_ca_pcps_acquisition.cc
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@@ -36,14 +36,8 @@ GlonassL1CaPcpsAcquisition::GlonassL1CaPcpsAcquisition(
//--- Find number of samples per spreading code ------------------------- //--- Find number of samples per spreading code -------------------------
code_length_ = round(fs_in_ / (GLONASS_L1_CA_CODE_RATE_HZ / GLONASS_L1_CA_CODE_LENGTH_CHIPS)); code_length_ = round(fs_in_ / (GLONASS_L1_CA_CODE_RATE_HZ / GLONASS_L1_CA_CODE_LENGTH_CHIPS));
LOG(ERROR) << "fs_in_ " << fs_in_;
LOG(ERROR) << "code_length_ " << code_length_;
vector_length_ = code_length_ * sampled_ms_; vector_length_ = code_length_ * sampled_ms_;
LOG(ERROR) << "vector_length_ " << vector_length_;
if( bit_transition_flag_ ) if( bit_transition_flag_ )
{ {
vector_length_ *= 2; vector_length_ *= 2;

25
src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_cc.cc
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@@ -34,6 +34,7 @@
#include "pcps_acquisition_cc.h" #include "pcps_acquisition_cc.h"
#include <sstream> #include <sstream>
#include <cstring>
#include <boost/filesystem.hpp> #include <boost/filesystem.hpp>
#include <gnuradio/io_signature.h> #include <gnuradio/io_signature.h>
#include <glog/logging.h> #include <glog/logging.h>
@@ -159,6 +160,11 @@ pcps_acquisition_cc::~pcps_acquisition_cc()
void pcps_acquisition_cc::set_local_code(std::complex<float> * code) void pcps_acquisition_cc::set_local_code(std::complex<float> * code)
{ {
// This will check if it's fdma, if yes will update the intermediate frequency and the doppler grid
if( is_fdma() )
{
update_grid_doppler_wipeoffs();
}
// COD // COD
// Here we want to create a buffer that looks like this: // Here we want to create a buffer that looks like this:
// [ 0 0 0 ... 0 c_0 c_1 ... c_L] // [ 0 0 0 ... 0 c_0 c_1 ... c_L]
@@ -179,6 +185,21 @@ void pcps_acquisition_cc::set_local_code(std::complex<float> * code)
volk_32fc_conjugate_32fc(d_fft_codes, d_fft_if->get_outbuf(), d_fft_size); volk_32fc_conjugate_32fc(d_fft_codes, d_fft_if->get_outbuf(), d_fft_size);
} }
bool pcps_acquisition_cc::is_fdma()
{
// Dealing with FDMA system
if( strcmp(d_gnss_synchro->Signal,"1G") == 0 )
{
d_freq += DFRQ1_GLO * GLONASS_PRN.at(d_gnss_synchro->PRN);
LOG(INFO) << "Trying to acquire SV PRN " << d_gnss_synchro->PRN << " with freq " << DFRQ1_GLO * GLONASS_PRN.at(d_gnss_synchro->PRN) << " in Channel " << GLONASS_PRN.at(d_gnss_synchro->PRN) << std::endl;
return true;
}
else
{
return false;
}
}
void pcps_acquisition_cc::update_local_carrier(gr_complex* carrier_vector, int correlator_length_samples, float freq) void pcps_acquisition_cc::update_local_carrier(gr_complex* carrier_vector, int correlator_length_samples, float freq)
{ {
@@ -203,7 +224,10 @@ void pcps_acquisition_cc::init()
d_input_power = 0.0; d_input_power = 0.0;
d_num_doppler_bins = ceil( static_cast<double>(static_cast<int>(d_doppler_max) - static_cast<int>(-d_doppler_max)) / static_cast<double>(d_doppler_step)); d_num_doppler_bins = ceil( static_cast<double>(static_cast<int>(d_doppler_max) - static_cast<int>(-d_doppler_max)) / static_cast<double>(d_doppler_step));
}
void pcps_acquisition_cc::update_grid_doppler_wipeoffs()
{
// Create the carrier Doppler wipeoff signals // Create the carrier Doppler wipeoff signals
d_grid_doppler_wipeoffs = new gr_complex*[d_num_doppler_bins]; d_grid_doppler_wipeoffs = new gr_complex*[d_num_doppler_bins];
@@ -216,6 +240,7 @@ void pcps_acquisition_cc::init()
} }
void pcps_acquisition_cc::set_state(int state) void pcps_acquisition_cc::set_state(int state)
{ {
gr::thread::scoped_lock lock(d_setlock); // require mutex with work function called by the scheduler gr::thread::scoped_lock lock(d_setlock); // require mutex with work function called by the scheduler

8
src/algorithms/acquisition/gnuradio_blocks/pcps_acquisition_cc.h
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@@ -95,6 +95,8 @@ private:
std::string dump_filename); std::string dump_filename);
void update_local_carrier(gr_complex* carrier_vector, int correlator_length_samples, float freq); void update_local_carrier(gr_complex* carrier_vector, int correlator_length_samples, float freq);
void update_grid_doppler_wipeoffs();
bool is_fdma();
void send_negative_acquisition(); void send_negative_acquisition();
void send_positive_acquisition(); void send_positive_acquisition();
@@ -148,12 +150,6 @@ public:
{ {
gr::thread::scoped_lock lock(d_setlock); // require mutex with work function called by the scheduler gr::thread::scoped_lock lock(d_setlock); // require mutex with work function called by the scheduler
d_gnss_synchro = p_gnss_synchro; d_gnss_synchro = p_gnss_synchro;
// Dealing with FDMA system
if(d_gnss_synchro->System == 'R')
{
d_freq += 0.5625e6 * GLONASS_PRN[d_gnss_synchro->PRN+1];
std::cout << "d_freq " << d_freq << std::endl;
}
} }
/*! /*!