mirror of https://github.com/gnss-sdr/gnss-sdr
153 lines
4.7 KiB
C++
153 lines
4.7 KiB
C++
/*!
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* \file galileo_e5a_dll_pll_tracking.cc
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* \brief Adapts a code DLL + carrier PLL
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* tracking block to a TrackingInterface for Galileo E5a signals
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* \author Marc Sales, 2014. marcsales92(at)gmail.com
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* \based on work from:
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* <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 "galileo_e5a_dll_pll_tracking.h"
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#include "Galileo_E5a.h"
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#include "configuration_interface.h"
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#include "display.h"
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#include "dll_pll_conf.h"
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#include "gnss_sdr_flags.h"
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#include <algorithm>
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#include <array>
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#if USE_GLOG_AND_GFLAGS
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#include <glog/logging.h>
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#else
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#include <absl/log/log.h>
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#endif
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GalileoE5aDllPllTracking::GalileoE5aDllPllTracking(
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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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item_size_(sizeof(gr_complex)),
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channel_(0),
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in_streams_(in_streams),
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out_streams_(out_streams)
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{
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Dll_Pll_Conf trk_params = Dll_Pll_Conf();
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trk_params.SetFromConfiguration(configuration, role_);
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const auto vector_length = static_cast<int>(std::round(trk_params.fs_in / (GALILEO_E5A_CODE_CHIP_RATE_CPS / GALILEO_E5A_CODE_LENGTH_CHIPS)));
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trk_params.vector_length = vector_length;
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if (trk_params.extend_correlation_symbols < 1)
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{
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trk_params.extend_correlation_symbols = 1;
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std::cout << TEXT_RED << "WARNING: Galileo E5a. extend_correlation_symbols must be bigger than 0. Coherent integration has been set to 1 symbol (1 ms)" << TEXT_RESET << '\n';
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}
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else if (!trk_params.track_pilot and trk_params.extend_correlation_symbols > GALILEO_E5A_I_SECONDARY_CODE_LENGTH)
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{
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trk_params.extend_correlation_symbols = GALILEO_E5A_I_SECONDARY_CODE_LENGTH;
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std::cout << TEXT_RED << "WARNING: Galileo E5a. extend_correlation_symbols must be lower than 21 when tracking the data component. Coherent integration has been set to 20 symbols (20 ms)" << TEXT_RESET << '\n';
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}
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if ((trk_params.extend_correlation_symbols > 1) and (trk_params.pll_bw_narrow_hz > trk_params.pll_bw_hz or trk_params.dll_bw_narrow_hz > trk_params.dll_bw_hz))
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{
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std::cout << TEXT_RED << "WARNING: Galileo E5a. PLL or DLL narrow tracking bandwidth is higher than wide tracking one" << TEXT_RESET << '\n';
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}
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trk_params.system = 'E';
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const std::array<char, 3> sig{'5', 'X', '\0'};
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std::copy_n(sig.data(), 3, trk_params.signal);
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// ################# Make a GNU Radio Tracking block object ################
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DLOG(INFO) << "role " << role;
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if (trk_params.item_type == "gr_complex")
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{
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tracking_sptr_ = dll_pll_veml_make_tracking(trk_params);
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DLOG(INFO) << "tracking(" << tracking_sptr_->unique_id() << ")";
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}
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else
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{
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item_size_ = 0;
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tracking_sptr_ = nullptr;
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LOG(WARNING) << trk_params.item_type << " unknown tracking 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_ > 1)
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{
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LOG(ERROR) << "This implementation only supports one output stream";
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}
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}
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void GalileoE5aDllPllTracking::stop_tracking()
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{
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tracking_sptr_->stop_tracking();
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}
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void GalileoE5aDllPllTracking::start_tracking()
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{
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tracking_sptr_->start_tracking();
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}
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/*
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* Set tracking channel unique ID
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*/
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void GalileoE5aDllPllTracking::set_channel(unsigned int channel)
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{
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channel_ = channel;
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tracking_sptr_->set_channel(channel);
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}
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void GalileoE5aDllPllTracking::set_gnss_synchro(Gnss_Synchro* p_gnss_synchro)
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{
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tracking_sptr_->set_gnss_synchro(p_gnss_synchro);
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}
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void GalileoE5aDllPllTracking::connect(gr::top_block_sptr 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 connect, now the tracking uses gr_sync_decimator
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}
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void GalileoE5aDllPllTracking::disconnect(gr::top_block_sptr 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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gr::basic_block_sptr GalileoE5aDllPllTracking::get_left_block()
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{
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return tracking_sptr_;
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}
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gr::basic_block_sptr GalileoE5aDllPllTracking::get_right_block()
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{
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return tracking_sptr_;
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}
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