mirror of https://github.com/gnss-sdr/gnss-sdr
144 lines
4.5 KiB
C++
144 lines
4.5 KiB
C++
/*!
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* \file glonass_l1_ca_dll_pll_tracking.cc
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* \brief Interface of an adapter of a DLL+PLL tracking loop block
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* for Glonass L1 C/A to a TrackingInterface
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* \author Gabriel Araujo, 2017. gabriel.araujo.5000(at)gmail.com
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* \author Luis Esteve, 2017. luis(at)epsilon-formacion.com
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*
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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, Birkha user, 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 "glonass_l1_ca_dll_pll_tracking.h"
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#include "GLONASS_L1_L2_CA.h"
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#include "configuration_interface.h"
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#include "gnss_sdr_flags.h"
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#include <glog/logging.h>
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GlonassL1CaDllPllTracking::GlonassL1CaDllPllTracking(
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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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DLOG(INFO) << "role " << role;
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// ################# CONFIGURATION PARAMETERS ########################
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const std::string default_item_type("gr_complex");
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std::string item_type = configuration->property(role + ".item_type", default_item_type);
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int fs_in_deprecated = configuration->property("GNSS-SDR.internal_fs_hz", 2048000);
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int fs_in = configuration->property("GNSS-SDR.internal_fs_sps", fs_in_deprecated);
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bool dump = configuration->property(role + ".dump", false);
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float pll_bw_hz = configuration->property(role + ".pll_bw_hz", static_cast<float>(50.0));
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if (FLAGS_pll_bw_hz != 0.0)
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{
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pll_bw_hz = static_cast<float>(FLAGS_pll_bw_hz);
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}
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float dll_bw_hz = configuration->property(role + ".dll_bw_hz", static_cast<float>(2.0));
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if (FLAGS_dll_bw_hz != 0.0)
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{
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dll_bw_hz = static_cast<float>(FLAGS_dll_bw_hz);
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}
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float early_late_space_chips = configuration->property(role + ".early_late_space_chips", static_cast<float>(0.5));
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const std::string default_dump_filename("./track_ch");
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std::string dump_filename = configuration->property(role + ".dump_filename", default_dump_filename);
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const auto vector_length = static_cast<int>(std::round(fs_in / (GLONASS_L1_CA_CODE_RATE_CPS / GLONASS_L1_CA_CODE_LENGTH_CHIPS)));
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// ################# MAKE TRACKING GNURadio object ###################
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if (item_type == "gr_complex")
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{
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item_size_ = sizeof(gr_complex);
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tracking_ = glonass_l1_ca_dll_pll_make_tracking_cc(
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fs_in,
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vector_length,
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dump,
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dump_filename,
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pll_bw_hz,
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dll_bw_hz,
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early_late_space_chips);
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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) << 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 GlonassL1CaDllPllTracking::stop_tracking()
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{
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}
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void GlonassL1CaDllPllTracking::start_tracking()
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{
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tracking_->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 GlonassL1CaDllPllTracking::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 GlonassL1CaDllPllTracking::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 GlonassL1CaDllPllTracking::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 GlonassL1CaDllPllTracking::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 GlonassL1CaDllPllTracking::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 GlonassL1CaDllPllTracking::get_right_block()
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{
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return tracking_;
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}
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