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https://github.com/gnss-sdr/gnss-sdr
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Add Gal. E5a Pcps acquisition adapter
This commit is contained in:
Antonio Ramos
parent
413ab8c8cf
commit
452dd24c90
@ -31,6 +31,7 @@ set(ACQ_ADAPTER_SOURCES
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galileo_e1_pcps_tong_ambiguous_acquisition.cc
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galileo_e1_pcps_8ms_ambiguous_acquisition.cc
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galileo_e5a_noncoherent_iq_acquisition_caf.cc
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galileo_e5a_pcps_acquisition.cc
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glonass_l1_ca_pcps_acquisition.cc
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)
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@ -0,0 +1,331 @@
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/*!
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* \file galileo_e5a_pcps_acquisition.cc
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* \brief Adapts a PCPS acquisition block to an AcquisitionInterface for
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* Galileo E5a data and pilot Signals
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* \author Antonio Ramos, 2018. antonio.ramos(at)cttc.es
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#include "galileo_e5a_pcps_acquisition.h"
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#include <boost/lexical_cast.hpp>
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#include <boost/math/distributions/exponential.hpp>
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#include <glog/logging.h>
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#include <volk_gnsssdr/volk_gnsssdr_complex.h>
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#include "galileo_e5_signal_processing.h"
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#include "Galileo_E5a.h"
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#include "configuration_interface.h"
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using google::LogMessage;
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GalileoE5aPcpsAcquisition::GalileoE5aPcpsAcquisition(ConfigurationInterface* configuration,
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std::string role, unsigned int in_streams, unsigned int out_streams) :
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role_(role), in_streams_(in_streams), out_streams_(out_streams)
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{
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configuration_ = configuration;
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std::string default_item_type = "gr_complex";
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std::string default_dump_filename = "../data/acquisition.dat";
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DLOG(INFO) << "Role " << role;
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item_type_ = configuration_->property(role + ".item_type", default_item_type);
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long fs_in_deprecated = configuration_->property("GNSS-SDR.internal_fs_hz", 32000000);
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fs_in_ = configuration_->property("GNSS-SDR.internal_fs_sps", fs_in_deprecated);
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acq_pilot_ = configuration_->property(role + ".acquire_pilot", false);
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dump_ = configuration_->property(role + ".dump", false);
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doppler_max_ = configuration_->property(role + ".doppler_max", 5000);
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sampled_ms_ = configuration_->property(role + ".coherent_integration_time_ms", 1);
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if (sampled_ms_ > 3)
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{
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sampled_ms_ = 3;
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DLOG(INFO) << "Coherent integration time should be 3 ms or less. Changing to 3ms ";
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std::cout << "Too high coherent integration time. Changing to 3ms" << std::endl;
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}
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/*
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if (Zero_padding > 0)
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{
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sampled_ms_ = 2;
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DLOG(INFO) << "Zero padding activated. Changing to 1ms code + 1ms zero padding ";
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std::cout << "Zero padding activated. Changing to 1ms code + 1ms zero padding" << std::endl;
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}
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*/
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max_dwells_ = configuration_->property(role + ".max_dwells", 1);
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dump_filename_ = configuration_->property(role + ".dump_filename", default_dump_filename);
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bit_transition_flag_ = configuration_->property(role + ".bit_transition_flag", false);
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use_CFAR_ = configuration_->property(role + ".use_CFAR_algorithm", false);
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blocking_ = configuration_->property(role + ".blocking", true);
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//--- Find number of samples per spreading code (1ms)-------------------------
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code_length_ = round(static_cast<double>(fs_in_) / Galileo_E5a_CODE_CHIP_RATE_HZ * static_cast<double>(Galileo_E5a_CODE_LENGTH_CHIPS));
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vector_length_ = code_length_ * sampled_ms_;
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/*
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codeI_= new gr_complex[vector_length_];
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codeQ_= new gr_complex[vector_length_];
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*/
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code_ = new gr_complex[vector_length_];
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if(item_type_.compare("gr_complex") == 0)
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{
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item_size_ = sizeof(gr_complex);
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}
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else if(item_type_.compare("cshort") == 0)
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{
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item_size_ = sizeof(lv_16sc_t);
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}
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else
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{
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item_size_ = sizeof(gr_complex);
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LOG(WARNING) << item_type_ << " unknown acquisition item type";
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}
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// CHANGE PARAMETERS OF MAKE ACQ.!!!!!!!
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acquisition_ = pcps_make_acquisition(sampled_ms_, max_dwells_, doppler_max_, 0, fs_in_,
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code_length_, code_length_, bit_transition_flag_, use_CFAR_, dump_, blocking_,
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dump_filename_,item_size_);
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stream_to_vector_ = gr::blocks::stream_to_vector::make(item_size_, vector_length_);
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channel_ = 0;
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threshold_ = 0.0;
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doppler_step_ = 0;
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gnss_synchro_ = 0;
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}
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GalileoE5aPcpsAcquisition::~GalileoE5aPcpsAcquisition()
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{
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delete[] code_;
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}
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void GalileoE5aPcpsAcquisition::set_channel(unsigned int channel)
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{
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channel_ = channel;
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acquisition_->set_channel(channel_);
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}
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void GalileoE5aPcpsAcquisition::set_threshold(float threshold)
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{
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float pfa = configuration_->property(role_+ boost::lexical_cast<std::string>(channel_) + ".pfa", 0.0);
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if(pfa == 0.0) { pfa = configuration_->property(role_ + ".pfa", 0.0); }
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if(pfa == 0.0) { threshold_ = threshold; }
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else { threshold_ = calculate_threshold(pfa); }
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DLOG(INFO) << "Channel " << channel_ << " Threshold = " << threshold_;
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acquisition_->set_threshold(threshold_);
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}
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void GalileoE5aPcpsAcquisition::set_doppler_max(unsigned int doppler_max)
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{
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doppler_max_ = doppler_max;
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acquisition_->set_doppler_max(doppler_max_);
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}
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void GalileoE5aPcpsAcquisition::set_doppler_step(unsigned int doppler_step)
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{
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doppler_step_ = doppler_step;
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acquisition_->set_doppler_step(doppler_step_);
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}
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void GalileoE5aPcpsAcquisition::set_gnss_synchro(Gnss_Synchro* gnss_synchro)
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{
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gnss_synchro_ = gnss_synchro;
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acquisition_->set_gnss_synchro(gnss_synchro_);
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}
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signed int GalileoE5aPcpsAcquisition::mag()
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{
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return acquisition_->mag();
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}
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void GalileoE5aPcpsAcquisition::init()
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{
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acquisition_->init();
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//set_local_code();
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}
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void GalileoE5aPcpsAcquisition::set_local_code()
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{
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gr_complex* code = new gr_complex[code_length_];
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char a[3];
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if(acq_pilot_) { strcpy(a,"5Q"); }
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else { strcpy(a,"5I"); }
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galileo_e5_a_code_gen_complex_sampled(code, a, gnss_synchro_->PRN, fs_in_, 0);
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for(unsigned int i = 0; i < sampled_ms_; i++)
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{
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memcpy(code_ + i * code_length_, code, sizeof(gr_complex) * code_length_);
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}
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acquisition_->set_local_code(code_);
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delete[] code;
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/*
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if (item_type_.compare("gr_complex") == 0)
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{
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std::complex<float>* codeI = new std::complex<float>[code_length_];
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std::complex<float>* codeQ = new std::complex<float>[code_length_];
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if (gnss_synchro_->Signal[0] == '5' && gnss_synchro_->Signal[1] == 'X')
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{
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char a[3];
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strcpy(a,"5I");
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galileo_e5_a_code_gen_complex_sampled(codeI, a,
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gnss_synchro_->PRN, fs_in_, 0);
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strcpy(a,"5Q");
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galileo_e5_a_code_gen_complex_sampled(codeQ, a,
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gnss_synchro_->PRN, fs_in_, 0);
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}
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else
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{
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galileo_e5_a_code_gen_complex_sampled(codeI, gnss_synchro_->Signal,
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gnss_synchro_->PRN, fs_in_, 0);
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}
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// WARNING: 3ms are coherently integrated. Secondary sequence (1,1,1)
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// is generated, and modulated in the 'block'.
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if (Zero_padding == 0) // if no zero_padding
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{
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for (unsigned int i = 0; i < sampled_ms_; i++)
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{
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memcpy(&(codeI_[i*code_length_]), codeI,
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sizeof(gr_complex)*code_length_);
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if (gnss_synchro_->Signal[0] == '5' && gnss_synchro_->Signal[1] == 'X')
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{
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memcpy(&(codeQ_[i*code_length_]), codeQ,
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sizeof(gr_complex)*code_length_);
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}
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}
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}
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else
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{
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// 1ms code + 1ms zero padding
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memcpy(&(codeI_[0]), codeI,
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sizeof(gr_complex)*code_length_);
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if (gnss_synchro_->Signal[0] == '5' && gnss_synchro_->Signal[1] == 'X')
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{
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memcpy(&(codeQ_[0]), codeQ,
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sizeof(gr_complex)*code_length_);
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}
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}
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acquisition_->set_local_code(codeI_,codeQ_);
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delete[] codeI;
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delete[] codeQ;
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}
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*/
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}
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void GalileoE5aPcpsAcquisition::reset()
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{
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acquisition_->set_active(true);
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}
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float GalileoE5aPcpsAcquisition::calculate_threshold(float pfa)
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{
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//Calculate the threshold
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unsigned int frequency_bins = 0;
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for (int doppler = static_cast<int>(-doppler_max_); doppler <= static_cast<int>(doppler_max_); doppler += doppler_step_)
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{
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frequency_bins++;
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}
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DLOG(INFO) << "Channel " << channel_ << " Pfa = " << pfa;
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unsigned int ncells = vector_length_ * frequency_bins;
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double exponent = 1 / static_cast<double>(ncells);
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double val = pow(1.0 - pfa, exponent);
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double lambda = double(vector_length_);
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boost::math::exponential_distribution<double> mydist (lambda);
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float threshold = static_cast<float>(quantile(mydist,val));
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return threshold;
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}
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void GalileoE5aPcpsAcquisition::set_state(int state)
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{
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acquisition_->set_state(state);
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}
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void GalileoE5aPcpsAcquisition::connect(gr::top_block_sptr top_block)
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{
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if (item_type_.compare("gr_complex") == 0)
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{
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top_block->connect(stream_to_vector_, 0, acquisition_, 0);
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}
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else if (item_type_.compare("cshort") == 0)
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{
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top_block->connect(stream_to_vector_, 0, acquisition_, 0);
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}
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else
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{
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LOG(WARNING) << item_type_ << " unknown acquisition item type";
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}
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}
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void GalileoE5aPcpsAcquisition::disconnect(gr::top_block_sptr top_block)
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{
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if (item_type_.compare("gr_complex") == 0)
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{
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top_block->disconnect(stream_to_vector_, 0, acquisition_, 0);
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}
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else if (item_type_.compare("cshort") == 0)
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{
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top_block->disconnect(stream_to_vector_, 0, acquisition_, 0);
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}
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else
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{
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LOG(WARNING) << item_type_ << " unknown acquisition item type";
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}
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}
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gr::basic_block_sptr GalileoE5aPcpsAcquisition::get_left_block()
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{
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return stream_to_vector_;
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}
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gr::basic_block_sptr GalileoE5aPcpsAcquisition::get_right_block()
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{
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return acquisition_;
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}
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@ -0,0 +1,170 @@
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/*!
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* \file galileo_e5a_pcps_acquisition.h
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* \brief Adapts a PCPS acquisition block to an AcquisitionInterface for
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* Galileo E5a data and pilot Signals
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* \author Antonio Ramos, 2018. antonio.ramos(at)cttc.es
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
|
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* (at your option) any later version.
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
|
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* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef GALILEO_E5A_PCPS_ACQUISITION_H_
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#define GALILEO_E5A_PCPS_ACQUISITION_H_
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#include <string>
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#include <gnuradio/blocks/stream_to_vector.h>
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#include "gnss_synchro.h"
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#include "acquisition_interface.h"
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#include "pcps_acquisition.h"
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class ConfigurationInterface;
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class GalileoE5aPcpsAcquisition: public AcquisitionInterface
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{
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public:
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GalileoE5aPcpsAcquisition(ConfigurationInterface* configuration,
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std::string role, unsigned int in_streams,
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unsigned int out_streams);
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virtual ~GalileoE5aPcpsAcquisition();
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inline std::string role() override
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{
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return role_;
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}
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inline std::string implementation() override
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{
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return "Galileo_E5a_Pcps_Acquisition";
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}
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inline size_t item_size() override
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{
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return item_size_;
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}
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void connect(gr::top_block_sptr top_block) override;
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void disconnect(gr::top_block_sptr top_block) override;
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gr::basic_block_sptr get_left_block() override;
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gr::basic_block_sptr get_right_block() override;
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/*!
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* \brief Set acquisition/tracking common Gnss_Synchro object pointer
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* to efficiently exchange synchronization data between acquisition and
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* tracking blocks
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*/
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void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro) override;
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/*!
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* \brief Set acquisition channel unique ID
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*/
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void set_channel(unsigned int channel) override;
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/*!
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* \brief Set statistics threshold of PCPS algorithm
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*/
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void set_threshold(float threshold) override;
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/*!
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* \brief Set maximum Doppler off grid search
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*/
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void set_doppler_max(unsigned int doppler_max) override;
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/*!
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* \brief Set Doppler steps for the grid search
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*/
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void set_doppler_step(unsigned int doppler_step) override;
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/*!
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* \brief Initializes acquisition algorithm.
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*/
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void init() override;
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/*!
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* \brief Sets local Galileo E5a code for PCPS acquisition algorithm.
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*/
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void set_local_code() override;
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/*!
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* \brief Returns the maximum peak of grid search
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*/
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signed int mag() override;
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/*!
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* \brief Restart acquisition algorithm
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*/
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void reset() override;
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/*!
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* \brief If set to 1, ensures that acquisition starts at the
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* first available sample.
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* \param state - int=1 forces start of acquisition
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*/
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void set_state(int state);
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private:
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float calculate_threshold(float pfa);
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ConfigurationInterface* configuration_;
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pcps_acquisition_sptr acquisition_;
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gr::blocks::stream_to_vector::sptr stream_to_vector_;
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size_t item_size_;
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std::string item_type_;
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std::string dump_filename_;
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std::string role_;
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|
||||
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_ */
|
||||
@ -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,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user