mirror of https://github.com/gnss-sdr/gnss-sdr
232 lines
7.3 KiB
C++
232 lines
7.3 KiB
C++
/*!
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* \file gps_l1_ca_dll_pll_c_aid_tracking.cc
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* \brief Implementation of an adapter of a DLL+PLL tracking loop block
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* for GPS L1 C/A to a TrackingInterface
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* \author Carlos Aviles, 2010. carlos.avilesr(at)googlemail.com
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* Javier Arribas, 2011. jarribas(at)cttc.es
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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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* Copyright (C) 2010-2015 (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 "gps_l1_ca_dll_pll_c_aid_tracking.h"
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#include <glog/logging.h>
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#include "GPS_L1_CA.h"
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#include "configuration_interface.h"
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using google::LogMessage;
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GpsL1CaDllPllCAidTracking::GpsL1CaDllPllCAidTracking(
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ConfigurationInterface* configuration, std::string role,
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unsigned int in_streams, unsigned int out_streams,
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boost::shared_ptr<gr::msg_queue> queue) :
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role_(role), in_streams_(in_streams), out_streams_(out_streams),
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queue_(queue)
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{
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DLOG(INFO) << "role " << role;
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//################# CONFIGURATION PARAMETERS ########################
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int fs_in;
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int vector_length;
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int f_if;
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bool dump;
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std::string dump_filename;
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std::string default_item_type = "gr_complex";
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float pll_bw_hz;
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float pll_bw_narrow_hz;
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float dll_bw_hz;
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float dll_bw_narrow_hz;
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float early_late_space_chips;
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item_type_ = configuration->property(role + ".item_type", default_item_type);
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//vector_length = configuration->property(role + ".vector_length", 2048);
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fs_in = configuration->property("GNSS-SDR.internal_fs_hz", 2048000);
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f_if = configuration->property(role + ".if", 0);
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dump = configuration->property(role + ".dump", false);
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pll_bw_hz = configuration->property(role + ".pll_bw_hz", 50.0);
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dll_bw_hz = configuration->property(role + ".dll_bw_hz", 2.0);
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pll_bw_narrow_hz = configuration->property(role + ".pll_bw_narrow_hz", 20.0);
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dll_bw_narrow_hz = configuration->property(role + ".dll_bw_narrow_hz", 2.0);
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int extend_correlation_ms;
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extend_correlation_ms = configuration->property(role + ".extend_correlation_ms", 1);
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early_late_space_chips = configuration->property(role + ".early_late_space_chips", 0.5);
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std::string default_dump_filename = "./track_ch";
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dump_filename = configuration->property(role + ".dump_filename",
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default_dump_filename); //unused!
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vector_length = std::round(fs_in / (GPS_L1_CA_CODE_RATE_HZ / GPS_L1_CA_CODE_LENGTH_CHIPS));
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//################# MAKE TRACKING GNURadio object ###################
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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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tracking_cc = gps_l1_ca_dll_pll_c_aid_make_tracking_cc(
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f_if,
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fs_in,
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vector_length,
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queue_,
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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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pll_bw_narrow_hz,
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dll_bw_narrow_hz,
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extend_correlation_ms,
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early_late_space_chips);
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DLOG(INFO) << "tracking(" << tracking_cc->unique_id() << ")";
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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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tracking_sc = gps_l1_ca_dll_pll_c_aid_make_tracking_sc(
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f_if,
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fs_in,
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vector_length,
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queue_,
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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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pll_bw_narrow_hz,
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dll_bw_narrow_hz,
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early_late_space_chips);
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DLOG(INFO) << "tracking(" << tracking_sc->unique_id() << ")";
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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 tracking item type.";
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}
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channel_ = 0;
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}
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GpsL1CaDllPllCAidTracking::~GpsL1CaDllPllCAidTracking()
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{}
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void GpsL1CaDllPllCAidTracking::start_tracking()
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{
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if (item_type_.compare("gr_complex") == 0)
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{
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tracking_cc->start_tracking();
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}
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else if (item_type_.compare("cshort") == 0)
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{
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tracking_sc->start_tracking();
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}
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else
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{
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LOG(WARNING) << item_type_ << " unknown tracking item type";
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}
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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 GpsL1CaDllPllCAidTracking::set_channel(unsigned int channel)
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{
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channel_ = channel;
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if (item_type_.compare("gr_complex") == 0)
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{
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tracking_cc->set_channel(channel);
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}
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else if (item_type_.compare("cshort") == 0)
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{
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tracking_sc->set_channel(channel);
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}
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else
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{
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LOG(WARNING) << item_type_ << " unknown tracking item type";
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}
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}
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void GpsL1CaDllPllCAidTracking::set_gnss_synchro(Gnss_Synchro* p_gnss_synchro)
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{
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if (item_type_.compare("gr_complex") == 0)
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{
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tracking_cc->set_gnss_synchro(p_gnss_synchro);
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}
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else if (item_type_.compare("cshort") == 0)
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{
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tracking_sc->set_gnss_synchro(p_gnss_synchro);
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}
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else
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{
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LOG(WARNING) << item_type_ << " unknown tracking item type";
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}
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}
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void GpsL1CaDllPllCAidTracking::connect(gr::top_block_sptr top_block)
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{
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if(top_block) { /* top_block is not null */};
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//nothing to connect, now the tracking uses gr_sync_decimator
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}
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void GpsL1CaDllPllCAidTracking::disconnect(gr::top_block_sptr top_block)
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{
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if(top_block) { /* top_block is not null */};
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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 GpsL1CaDllPllCAidTracking::get_left_block()
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{
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if (item_type_.compare("gr_complex") == 0)
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{
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return tracking_cc;
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}
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else if (item_type_.compare("cshort") == 0)
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{
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return tracking_sc;
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}
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else
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{
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LOG(WARNING) << item_type_ << " unknown tracking item type";
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return nullptr;
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}
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}
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gr::basic_block_sptr GpsL1CaDllPllCAidTracking::get_right_block()
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{
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if (item_type_.compare("gr_complex") == 0)
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{
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return tracking_cc;
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}
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else if (item_type_.compare("cshort") == 0)
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{
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return tracking_sc;
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}
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else
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{
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LOG(WARNING) << item_type_ << " unknown tracking item type";
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return nullptr;
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}
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}
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