1
0
mirror of https://github.com/gnss-sdr/gnss-sdr synced 2024-12-16 05:00:35 +00:00

Add Gal. E5a Pcps acquisition adapter

This commit is contained in:
Antonio Ramos 2018-02-07 14:26:25 +01:00
parent 413ab8c8cf
commit 452dd24c90
5 changed files with 516 additions and 1 deletions

View File

@ -31,6 +31,7 @@ set(ACQ_ADAPTER_SOURCES
galileo_e1_pcps_tong_ambiguous_acquisition.cc
galileo_e1_pcps_8ms_ambiguous_acquisition.cc
galileo_e5a_noncoherent_iq_acquisition_caf.cc
galileo_e5a_pcps_acquisition.cc
glonass_l1_ca_pcps_acquisition.cc
)

View File

@ -0,0 +1,331 @@
/*!
* \file galileo_e5a_pcps_acquisition.cc
* \brief Adapts a PCPS acquisition block to an AcquisitionInterface for
* Galileo E5a data and pilot Signals
* \author Antonio Ramos, 2018. antonio.ramos(at)cttc.es
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include "galileo_e5a_pcps_acquisition.h"
#include <boost/lexical_cast.hpp>
#include <boost/math/distributions/exponential.hpp>
#include <glog/logging.h>
#include <volk_gnsssdr/volk_gnsssdr_complex.h>
#include "galileo_e5_signal_processing.h"
#include "Galileo_E5a.h"
#include "configuration_interface.h"
using google::LogMessage;
GalileoE5aPcpsAcquisition::GalileoE5aPcpsAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams, unsigned int out_streams) :
role_(role), in_streams_(in_streams), out_streams_(out_streams)
{
configuration_ = configuration;
std::string default_item_type = "gr_complex";
std::string default_dump_filename = "../data/acquisition.dat";
DLOG(INFO) << "Role " << role;
item_type_ = configuration_->property(role + ".item_type", default_item_type);
long fs_in_deprecated = configuration_->property("GNSS-SDR.internal_fs_hz", 32000000);
fs_in_ = configuration_->property("GNSS-SDR.internal_fs_sps", fs_in_deprecated);
acq_pilot_ = configuration_->property(role + ".acquire_pilot", false);
dump_ = configuration_->property(role + ".dump", false);
doppler_max_ = configuration_->property(role + ".doppler_max", 5000);
sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 1);
if (sampled_ms_ > 3)
{
sampled_ms_ = 3;
DLOG(INFO) << "Coherent integration time should be 3 ms or less. Changing to 3ms ";
std::cout << "Too high coherent integration time. Changing to 3ms" << std::endl;
}
/*
if (Zero_padding > 0)
{
sampled_ms_ = 2;
DLOG(INFO) << "Zero padding activated. Changing to 1ms code + 1ms zero padding ";
std::cout << "Zero padding activated. Changing to 1ms code + 1ms zero padding" << std::endl;
}
*/
max_dwells_ = configuration_->property(role + ".max_dwells", 1);
dump_filename_ = configuration_->property(role + ".dump_filename", default_dump_filename);
bit_transition_flag_ = configuration_->property(role + ".bit_transition_flag", false);
use_CFAR_ = configuration_->property(role + ".use_CFAR_algorithm", false);
blocking_ = configuration_->property(role + ".blocking", true);
//--- Find number of samples per spreading code (1ms)-------------------------
code_length_ = round(static_cast<double>(fs_in_) / Galileo_E5a_CODE_CHIP_RATE_HZ * static_cast<double>(Galileo_E5a_CODE_LENGTH_CHIPS));
vector_length_ = code_length_ * sampled_ms_;
/*
codeI_= new gr_complex[vector_length_];
codeQ_= new gr_complex[vector_length_];
*/
code_ = new gr_complex[vector_length_];
if(item_type_.compare("gr_complex") == 0)
{
item_size_ = sizeof(gr_complex);
}
else if(item_type_.compare("cshort") == 0)
{
item_size_ = sizeof(lv_16sc_t);
}
else
{
item_size_ = sizeof(gr_complex);
LOG(WARNING) << item_type_ << " unknown acquisition item type";
}
// CHANGE PARAMETERS OF MAKE ACQ.!!!!!!!
acquisition_ = pcps_make_acquisition(sampled_ms_, max_dwells_, doppler_max_, 0, fs_in_,
code_length_, code_length_, bit_transition_flag_, use_CFAR_, dump_, blocking_,
dump_filename_,item_size_);
stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_);
channel_ = 0;
threshold_ = 0.0;
doppler_step_ = 0;
gnss_synchro_ = 0;
}
GalileoE5aPcpsAcquisition::~GalileoE5aPcpsAcquisition()
{
delete[] code_;
}
void GalileoE5aPcpsAcquisition::set_channel(unsigned int channel)
{
channel_ = channel;
acquisition_->set_channel(channel_);
}
void GalileoE5aPcpsAcquisition::set_threshold(float threshold)
{
float pfa = configuration_->property(role_+ boost::lexical_cast<std::string>(channel_) + ".pfa", 0.0);
if(pfa == 0.0) { pfa = configuration_->property(role_ + ".pfa", 0.0); }
if(pfa == 0.0) { threshold_ = threshold; }
else { threshold_ = calculate_threshold(pfa); }
DLOG(INFO) << "Channel " << channel_ << " Threshold = " << threshold_;
acquisition_->set_threshold(threshold_);
}
void GalileoE5aPcpsAcquisition::set_doppler_max(unsigned int doppler_max)
{
doppler_max_ = doppler_max;
acquisition_->set_doppler_max(doppler_max_);
}
void GalileoE5aPcpsAcquisition::set_doppler_step(unsigned int doppler_step)
{
doppler_step_ = doppler_step;
acquisition_->set_doppler_step(doppler_step_);
}
void GalileoE5aPcpsAcquisition::set_gnss_synchro(Gnss_Synchro* gnss_synchro)
{
gnss_synchro_ = gnss_synchro;
acquisition_->set_gnss_synchro(gnss_synchro_);
}
signed int GalileoE5aPcpsAcquisition::mag()
{
return acquisition_->mag();
}
void GalileoE5aPcpsAcquisition::init()
{
acquisition_->init();
//set_local_code();
}
void GalileoE5aPcpsAcquisition::set_local_code()
{
gr_complex* code = new gr_complex[code_length_];
char a[3];
if(acq_pilot_) { strcpy(a,"5Q"); }
else { strcpy(a,"5I"); }
galileo_e5_a_code_gen_complex_sampled(code, a, gnss_synchro_->PRN, fs_in_, 0);
for(unsigned int i = 0; i < sampled_ms_; i++)
{
memcpy(code_ + i * code_length_, code, sizeof(gr_complex) * code_length_);
}
acquisition_->set_local_code(code_);
delete[] code;
/*
if (item_type_.compare("gr_complex") == 0)
{
std::complex<float>* codeI = new std::complex<float>[code_length_];
std::complex<float>* codeQ = new std::complex<float>[code_length_];
if (gnss_synchro_->Signal[0] == '5' && gnss_synchro_->Signal[1] == 'X')
{
char a[3];
strcpy(a,"5I");
galileo_e5_a_code_gen_complex_sampled(codeI, a,
gnss_synchro_->PRN, fs_in_, 0);
strcpy(a,"5Q");
galileo_e5_a_code_gen_complex_sampled(codeQ, a,
gnss_synchro_->PRN, fs_in_, 0);
}
else
{
galileo_e5_a_code_gen_complex_sampled(codeI, gnss_synchro_->Signal,
gnss_synchro_->PRN, fs_in_, 0);
}
// WARNING: 3ms are coherently integrated. Secondary sequence (1,1,1)
// is generated, and modulated in the 'block'.
if (Zero_padding == 0) // if no zero_padding
{
for (unsigned int i = 0; i < sampled_ms_; i++)
{
memcpy(&(codeI_[i*code_length_]), codeI,
sizeof(gr_complex)*code_length_);
if (gnss_synchro_->Signal[0] == '5' && gnss_synchro_->Signal[1] == 'X')
{
memcpy(&(codeQ_[i*code_length_]), codeQ,
sizeof(gr_complex)*code_length_);
}
}
}
else
{
// 1ms code + 1ms zero padding
memcpy(&(codeI_[0]), codeI,
sizeof(gr_complex)*code_length_);
if (gnss_synchro_->Signal[0] == '5' && gnss_synchro_->Signal[1] == 'X')
{
memcpy(&(codeQ_[0]), codeQ,
sizeof(gr_complex)*code_length_);
}
}
acquisition_->set_local_code(codeI_,codeQ_);
delete[] codeI;
delete[] codeQ;
}
*/
}
void GalileoE5aPcpsAcquisition::reset()
{
acquisition_->set_active(true);
}
float GalileoE5aPcpsAcquisition::calculate_threshold(float pfa)
{
//Calculate the threshold
unsigned int frequency_bins = 0;
for (int doppler = static_cast<int>(-doppler_max_); doppler <= static_cast<int>(doppler_max_); doppler += doppler_step_)
{
frequency_bins++;
}
DLOG(INFO) << "Channel " << channel_ << " Pfa = " << pfa;
unsigned int ncells = vector_length_ * frequency_bins;
double exponent = 1 / static_cast<double>(ncells);
double val = pow(1.0 - pfa, exponent);
double lambda = double(vector_length_);
boost::math::exponential_distribution<double> mydist (lambda);
float threshold = static_cast<float>(quantile(mydist,val));
return threshold;
}
void GalileoE5aPcpsAcquisition::set_state(int state)
{
acquisition_->set_state(state);
}
void GalileoE5aPcpsAcquisition::connect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_, 0);
}
else if (item_type_.compare("cshort") == 0)
{
top_block->connect(stream_to_vector_, 0, acquisition_, 0);
}
else
{
LOG(WARNING) << item_type_ << " unknown acquisition item type";
}
}
void GalileoE5aPcpsAcquisition::disconnect(gr::top_block_sptr top_block)
{
if (item_type_.compare("gr_complex") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_, 0);
}
else if (item_type_.compare("cshort") == 0)
{
top_block->disconnect(stream_to_vector_, 0, acquisition_, 0);
}
else
{
LOG(WARNING) << item_type_ << " unknown acquisition item type";
}
}
gr::basic_block_sptr GalileoE5aPcpsAcquisition::get_left_block()
{
return stream_to_vector_;
}
gr::basic_block_sptr GalileoE5aPcpsAcquisition::get_right_block()
{
return acquisition_;
}

View File

@ -0,0 +1,170 @@
/*!
* \file galileo_e5a_pcps_acquisition.h
* \brief Adapts a PCPS acquisition block to an AcquisitionInterface for
* Galileo E5a data and pilot Signals
* \author Antonio Ramos, 2018. antonio.ramos(at)cttc.es
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GNSS-SDR is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef GALILEO_E5A_PCPS_ACQUISITION_H_
#define GALILEO_E5A_PCPS_ACQUISITION_H_
#include <string>
#include <gnuradio/blocks/stream_to_vector.h>
#include "gnss_synchro.h"
#include "acquisition_interface.h"
#include "pcps_acquisition.h"
class ConfigurationInterface;
class GalileoE5aPcpsAcquisition: public AcquisitionInterface
{
public:
GalileoE5aPcpsAcquisition(ConfigurationInterface* configuration,
std::string role, unsigned int in_streams,
unsigned int out_streams);
virtual ~GalileoE5aPcpsAcquisition();
inline std::string role() override
{
return role_;
}
inline std::string implementation() override
{
return "Galileo_E5a_Pcps_Acquisition";
}
inline size_t item_size() override
{
return item_size_;
}
void connect(gr::top_block_sptr top_block) override;
void disconnect(gr::top_block_sptr top_block) override;
gr::basic_block_sptr get_left_block() override;
gr::basic_block_sptr get_right_block() override;
/*!
* \brief Set acquisition/tracking common Gnss_Synchro object pointer
* to efficiently exchange synchronization data between acquisition and
* tracking blocks
*/
void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro) override;
/*!
* \brief Set acquisition channel unique ID
*/
void set_channel(unsigned int channel) override;
/*!
* \brief Set statistics threshold of PCPS algorithm
*/
void set_threshold(float threshold) override;
/*!
* \brief Set maximum Doppler off grid search
*/
void set_doppler_max(unsigned int doppler_max) override;
/*!
* \brief Set Doppler steps for the grid search
*/
void set_doppler_step(unsigned int doppler_step) override;
/*!
* \brief Initializes acquisition algorithm.
*/
void init() override;
/*!
* \brief Sets local Galileo E5a code for PCPS acquisition algorithm.
*/
void set_local_code() override;
/*!
* \brief Returns the maximum peak of grid search
*/
signed int mag() override;
/*!
* \brief Restart acquisition algorithm
*/
void reset() override;
/*!
* \brief If set to 1, ensures that acquisition starts at the
* first available sample.
* \param state - int=1 forces start of acquisition
*/
void set_state(int state);
private:
float calculate_threshold(float pfa);
ConfigurationInterface* configuration_;
pcps_acquisition_sptr acquisition_;
gr::blocks::stream_to_vector::sptr stream_to_vector_;
size_t item_size_;
std::string item_type_;
std::string dump_filename_;
std::string role_;
bool bit_transition_flag_;
bool dump_;
bool acq_pilot_;
bool use_CFAR_;
bool blocking_;
unsigned int vector_length_;
unsigned int code_length_;
unsigned int channel_;
unsigned int doppler_max_;
unsigned int doppler_step_;
unsigned int sampled_ms_;
unsigned int max_dwells_;
unsigned int in_streams_;
unsigned int out_streams_;
long fs_in_;
float threshold_;
/*
std::complex<float>* codeI_;
std::complex<float>* codeQ_;
*/
gr_complex* code_;
Gnss_Synchro* gnss_synchro_;
};
#endif /* GALILEO_E5A_PCPS_ACQUISITION_H_ */

View File

@ -82,6 +82,7 @@
#include "galileo_e1_pcps_cccwsr_ambiguous_acquisition.h"
#include "galileo_e1_pcps_quicksync_ambiguous_acquisition.h"
#include "galileo_e5a_noncoherent_iq_acquisition_caf.h"
#include "galileo_e5a_pcps_acquisition.h"
#include "glonass_l1_ca_pcps_acquisition.h"
#include "gps_l1_ca_dll_pll_tracking.h"
#include "gps_l1_ca_dll_pll_c_aid_tracking.h"
@ -1270,6 +1271,12 @@ std::unique_ptr<GNSSBlockInterface> GNSSBlockFactory::GetBlock(
out_streams));
block = std::move(block_);
}
else if (implementation.compare("Galileo_E5a_Pcps_Acquisition") == 0)
{
std::unique_ptr<GNSSBlockInterface> block_(new GalileoE5aPcpsAcquisition(configuration.get(), role, in_streams,
out_streams));
block = std::move(block_);
}
else if (implementation.compare("Galileo_E1_PCPS_QuickSync_Ambiguous_Acquisition") == 0)
{
std::unique_ptr<GNSSBlockInterface> block_( new GalileoE1PcpsQuickSyncAmbiguousAcquisition(configuration.get(), role, in_streams,
@ -1543,6 +1550,12 @@ std::unique_ptr<AcquisitionInterface> GNSSBlockFactory::GetAcqBlock(
out_streams));
block = std::move(block_);
}
else if (implementation.compare("Galileo_E5a_Pcps_Acquisition") == 0)
{
std::unique_ptr<AcquisitionInterface> block_(new GalileoE5aPcpsAcquisition(configuration.get(), role, in_streams,
out_streams));
block = std::move(block_);
}
else if (implementation.compare("GLONASS_L1_CA_PCPS_Acquisition") == 0)
{
std::unique_ptr<AcquisitionInterface> block_(new GlonassL1CaPcpsAcquisition(configuration.get(), role, in_streams,

View File

@ -47,7 +47,7 @@ const int Galileo_E5a_CODE_LENGTH_CHIPS = 10230; //!< Galileo E5a prima
const int Galileo_E5a_I_SECONDARY_CODE_LENGTH = 20; //!< Galileo E5a-I secondary code length [chips]
const int Galileo_E5a_Q_SECONDARY_CODE_LENGTH = 100; //!< Galileo E5a-Q secondary code length [chips]
const double GALILEO_E5a_CODE_PERIOD = 0.001; //!< Galileo E1 primary code period [s]
const int GALILEO_E5a_CODE_PERIOD_MS = 1; //!< Galileo E1 primary code period [ms]
const int GALILEO_E5a_CODE_PERIOD_MS = 1; //!< Galileo E1 primary code period [ms]
const int Galileo_E5a_SYMBOL_RATE_BPS = 50; //!< Galileo E5a symbol rate [bits/second]
const int Galileo_E5a_NUMBER_OF_CODES = 50;