mirror of https://github.com/gnss-sdr/gnss-sdr
139 lines
4.3 KiB
C++
139 lines
4.3 KiB
C++
/*!
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* \file beidou_b3i_dll_pll_tracking.cc
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* \brief Implementation of an adapter of a DLL+PLL tracking loop block
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* for Beidou B3I to a TrackingInterface
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* \author Damian Miralles, 2019. dmiralles2009(at)gmail.com
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*
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* Code DLL + carrier PLL according to the algorithms described in:
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* K.Borre, D.M.Akos, N.Bertelsen, P.Rinder, and S.H.Jensen,
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* A Software-Defined GPS and Galileo Receiver. A Single-Frequency
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* Approach, Birkhauser, 2007
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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 "beidou_b3i_dll_pll_tracking.h"
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#include "Beidou_B3I.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 <glog/logging.h>
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#include <array>
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using google::LogMessage;
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BeidouB3iDllPllTracking::BeidouB3iDllPllTracking(
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const ConfigurationInterface* configuration, const std::string& role,
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unsigned int in_streams, unsigned int out_streams) : role_(role), in_streams_(in_streams), out_streams_(out_streams)
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{
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Dll_Pll_Conf trk_params = Dll_Pll_Conf();
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DLOG(INFO) << "role " << role;
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trk_params.SetFromConfiguration(configuration, role);
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const auto vector_length = static_cast<int>(std::round(static_cast<double>(trk_params.fs_in) / (BEIDOU_B3I_CODE_RATE_CPS / BEIDOU_B3I_CODE_LENGTH_CHIPS)));
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trk_params.vector_length = vector_length;
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trk_params.track_pilot = configuration->property(role + ".track_pilot", false);
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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: BEIDOU B3I. extend_correlation_symbols must be bigger than 1. 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.extend_correlation_symbols > 20)
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{
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trk_params.extend_correlation_symbols = 20;
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std::cout << TEXT_RED << "WARNING: BEIDOU B3I. extend_correlation_symbols must be lower than 21. Coherent integration has been set to 20 symbols (20 ms)" << TEXT_RESET << '\n';
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}
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trk_params.system = 'C';
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const std::array<char, 3> sig_{'B', '3', '\0'};
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std::memcpy(trk_params.signal, sig_.data(), 3);
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// ################# Make a GNU Radio Tracking block object ################
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if (trk_params.item_type == "gr_complex")
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{
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item_size_ = sizeof(gr_complex);
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tracking_ = dll_pll_veml_make_tracking(trk_params);
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}
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else
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{
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item_size_ = 0;
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LOG(WARNING) << trk_params.item_type << " unknown tracking item type.";
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}
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channel_ = 0;
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DLOG(INFO) << "tracking(" << tracking_->unique_id() << ")";
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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 BeidouB3iDllPllTracking::start_tracking()
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{
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tracking_->start_tracking();
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}
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void BeidouB3iDllPllTracking::stop_tracking()
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{
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tracking_->stop_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 BeidouB3iDllPllTracking::set_channel(unsigned int channel)
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{
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channel_ = channel;
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tracking_->set_channel(channel);
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}
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void BeidouB3iDllPllTracking::set_gnss_synchro(Gnss_Synchro* p_gnss_synchro)
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{
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tracking_->set_gnss_synchro(p_gnss_synchro);
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}
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void BeidouB3iDllPllTracking::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 BeidouB3iDllPllTracking::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 BeidouB3iDllPllTracking::get_left_block()
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{
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return tracking_;
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}
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gr::basic_block_sptr BeidouB3iDllPllTracking::get_right_block()
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{
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return tracking_;
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}
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