mirror of https://github.com/gnss-sdr/gnss-sdr
191 lines
5.7 KiB
C++
191 lines
5.7 KiB
C++
/*!
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* \file gps_l1_ca_pcps_acquisition.cc
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* \brief Adapts a PCPS acquisition block to an AcquisitionInterface for
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* GPS L1 C/A Signals
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* \authors <ul>
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* <li> Javier Arribas, 2011. jarribas(at)cttc.es
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* <li> Luis Esteve, 2012. luis(at)epsilon-formacion.com
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* </ul>
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*
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* -----------------------------------------------------------------------------
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*
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* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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* This file is part of GNSS-SDR.
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*
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* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -----------------------------------------------------------------------------
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*/
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#include "gps_l1_ca_pcps_acquisition_fine_doppler.h"
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#include "GPS_L1_CA.h"
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#include "acq_conf.h"
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#include "configuration_interface.h"
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#include "gnss_sdr_flags.h"
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#include "gps_sdr_signal_replica.h"
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#include <glog/logging.h>
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GpsL1CaPcpsAcquisitionFineDoppler::GpsL1CaPcpsAcquisitionFineDoppler(
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const ConfigurationInterface* configuration,
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const std::string& role,
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unsigned int in_streams,
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unsigned int out_streams)
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: role_(role),
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gnss_synchro_(nullptr),
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item_size_(sizeof(gr_complex)),
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threshold_(0.0),
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doppler_max_(configuration->property(role + ".doppler_max", 5000)),
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max_dwells_(configuration->property(role + ".max_dwells", 1)),
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channel_(0),
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doppler_step_(0),
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sampled_ms_(configuration->property(role + ".coherent_integration_time_ms", 1)),
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in_streams_(in_streams),
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out_streams_(out_streams),
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dump_(configuration->property(role + ".dump", false))
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{
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const std::string default_item_type("gr_complex");
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std::string default_dump_filename = "./acquisition.mat";
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Acq_Conf acq_parameters = Acq_Conf();
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item_type_ = configuration->property(role_ + ".item_type", default_item_type);
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int64_t fs_in_deprecated = configuration->property("GNSS-SDR.internal_fs_hz", 2048000);
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fs_in_ = configuration->property("GNSS-SDR.internal_fs_sps", fs_in_deprecated);
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acq_parameters.fs_in = fs_in_;
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acq_parameters.samples_per_chip = static_cast<unsigned int>(ceil(GPS_L1_CA_CHIP_PERIOD_S * static_cast<float>(acq_parameters.fs_in)));
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acq_parameters.dump = dump_;
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dump_filename_ = configuration->property(role_ + ".dump_filename", default_dump_filename);
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acq_parameters.dump_filename = dump_filename_;
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if (FLAGS_doppler_max != 0)
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{
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doppler_max_ = FLAGS_doppler_max;
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}
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acq_parameters.doppler_max = doppler_max_;
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acq_parameters.sampled_ms = sampled_ms_;
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acq_parameters.max_dwells = max_dwells_;
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acq_parameters.blocking_on_standby = configuration->property(role + ".blocking_on_standby", false);
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// -- Find number of samples per spreading code -------------------------
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vector_length_ = static_cast<unsigned int>(round(fs_in_ / (GPS_L1_CA_CODE_RATE_CPS / GPS_L1_CA_CODE_LENGTH_CHIPS)));
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acq_parameters.samples_per_ms = static_cast<float>(vector_length_);
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code_ = std::vector<std::complex<float>>(vector_length_);
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DLOG(INFO) << "role " << role_;
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if (item_type_ == "gr_complex")
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{
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acquisition_cc_ = pcps_make_acquisition_fine_doppler_cc(acq_parameters);
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}
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else
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{
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item_size_ = 0;
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acquisition_cc_ = nullptr;
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LOG(WARNING) << item_type_ << " unknown acquisition item type";
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}
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if (in_streams_ > 1)
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{
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LOG(ERROR) << "This implementation only supports one input stream";
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}
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if (out_streams_ > 0)
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{
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LOG(ERROR) << "This implementation does not provide an output stream";
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}
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::stop_acquisition()
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{
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acquisition_cc_->set_state(0);
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acquisition_cc_->set_active(false);
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::set_threshold(float threshold)
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{
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threshold_ = threshold;
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acquisition_cc_->set_threshold(threshold_);
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::set_doppler_max(unsigned int doppler_max)
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{
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doppler_max_ = static_cast<int>(doppler_max);
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acquisition_cc_->set_doppler_max(doppler_max_);
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::set_doppler_step(unsigned int doppler_step)
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{
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doppler_step_ = doppler_step;
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acquisition_cc_->set_doppler_step(doppler_step_);
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::set_gnss_synchro(Gnss_Synchro* gnss_synchro)
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{
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gnss_synchro_ = gnss_synchro;
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acquisition_cc_->set_gnss_synchro(gnss_synchro_);
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}
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signed int GpsL1CaPcpsAcquisitionFineDoppler::mag()
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{
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return static_cast<signed int>(acquisition_cc_->mag());
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::init()
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{
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acquisition_cc_->init();
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::set_local_code()
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{
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gps_l1_ca_code_gen_complex_sampled(code_, gnss_synchro_->PRN, fs_in_, 0);
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acquisition_cc_->set_local_code(code_.data());
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::reset()
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{
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acquisition_cc_->set_active(true);
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::set_state(int state)
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{
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acquisition_cc_->set_state(state);
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::connect(gnss_shared_ptr<gr::top_block> top_block)
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{
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if (top_block)
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{ /* top_block is not null */
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};
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// nothing to disconnect, now the tracking uses gr_sync_decimator
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}
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void GpsL1CaPcpsAcquisitionFineDoppler::disconnect(gnss_shared_ptr<gr::top_block> top_block)
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{
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if (top_block)
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{ /* top_block is not null */
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};
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// nothing to disconnect, now the tracking uses gr_sync_decimator
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}
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gnss_shared_ptr<gr::basic_block> GpsL1CaPcpsAcquisitionFineDoppler::get_left_block()
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{
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return acquisition_cc_;
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}
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gnss_shared_ptr<gr::basic_block> GpsL1CaPcpsAcquisitionFineDoppler::get_right_block()
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{
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return acquisition_cc_;
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}
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