/*! * \file galileo_e5a_dll_pll_tracking_fpga.cc * \brief Adapts a code DLL + carrier PLL * tracking block to a TrackingInterface for Galileo E5a signals for the FPGA * \brief Adapts a PCPS acquisition block to an AcquisitionInterface for * Galileo E5a data and pilot Signals for the FPGA * \author Marc Sales, 2014. marcsales92(at)gmail.com * \based on work from: * * * ------------------------------------------------------------------------- * * Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors) * * GNSS-SDR is a software defined Global Navigation * Satellite Systems receiver * * This file is part of GNSS-SDR. * * GNSS-SDR is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * GNSS-SDR is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GNSS-SDR. If not, see . * * ------------------------------------------------------------------------- */ #include "galileo_e5a_dll_pll_tracking_fpga.h" #include "Galileo_E5a.h" #include "configuration_interface.h" #include "display.h" #include "galileo_e5_signal_processing.h" #include "gnss_sdr_flags.h" #include using google::LogMessage; void GalileoE5aDllPllTrackingFpga::stop_tracking() { } GalileoE5aDllPllTrackingFpga::GalileoE5aDllPllTrackingFpga( ConfigurationInterface *configuration, const std::string &role, unsigned int in_streams, unsigned int out_streams) : role_(role), in_streams_(in_streams), out_streams_(out_streams) { Dll_Pll_Conf_Fpga trk_param_fpga = Dll_Pll_Conf_Fpga(); DLOG(INFO) << "role " << role; //################# CONFIGURATION PARAMETERS ######################## std::string default_item_type = "gr_complex"; std::string item_type = configuration->property(role + ".item_type", default_item_type); int fs_in_deprecated = configuration->property("GNSS-SDR.internal_fs_hz", 12000000); int fs_in = configuration->property("GNSS-SDR.internal_fs_sps", fs_in_deprecated); trk_param_fpga.fs_in = fs_in; bool dump = configuration->property(role + ".dump", false); trk_param_fpga.dump = dump; std::string default_dump_filename = "./track_ch"; std::string dump_filename = configuration->property(role + ".dump_filename", default_dump_filename); trk_param_fpga.dump_filename = dump_filename; bool dump_mat = configuration->property(role + ".dump_mat", true); trk_param_fpga.dump_mat = dump_mat; float pll_bw_hz = configuration->property(role + ".pll_bw_hz", 20.0); if (FLAGS_pll_bw_hz != 0.0) pll_bw_hz = static_cast(FLAGS_pll_bw_hz); trk_param_fpga.pll_bw_hz = pll_bw_hz; float dll_bw_hz = configuration->property(role + ".dll_bw_hz", 20.0); if (FLAGS_dll_bw_hz != 0.0) dll_bw_hz = static_cast(FLAGS_dll_bw_hz); trk_param_fpga.dll_bw_hz = dll_bw_hz; float pll_bw_narrow_hz = configuration->property(role + ".pll_bw_narrow_hz", 5.0); trk_param_fpga.pll_bw_narrow_hz = pll_bw_narrow_hz; float dll_bw_narrow_hz = configuration->property(role + ".dll_bw_narrow_hz", 2.0); trk_param_fpga.dll_bw_narrow_hz = dll_bw_narrow_hz; float early_late_space_chips = configuration->property(role + ".early_late_space_chips", 0.5); trk_param_fpga.early_late_space_chips = early_late_space_chips; int vector_length = std::round(fs_in / (GALILEO_E5A_CODE_CHIP_RATE_HZ / GALILEO_E5A_CODE_LENGTH_CHIPS)); trk_param_fpga.vector_length = vector_length; int extend_correlation_symbols = configuration->property(role + ".extend_correlation_symbols", 1); float early_late_space_narrow_chips = configuration->property(role + ".early_late_space_narrow_chips", 0.15); trk_param_fpga.early_late_space_narrow_chips = early_late_space_narrow_chips; bool track_pilot = configuration->property(role + ".track_pilot", false); d_track_pilot = track_pilot; if (extend_correlation_symbols < 1) { extend_correlation_symbols = 1; 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 << std::endl; } else if (!track_pilot and extend_correlation_symbols > GALILEO_E5A_I_SECONDARY_CODE_LENGTH) { extend_correlation_symbols = GALILEO_E5A_I_SECONDARY_CODE_LENGTH; 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 << std::endl; } if ((extend_correlation_symbols > 1) and (pll_bw_narrow_hz > pll_bw_hz or dll_bw_narrow_hz > dll_bw_hz)) { std::cout << TEXT_RED << "WARNING: Galileo E5a. PLL or DLL narrow tracking bandwidth is higher than wide tracking one" << TEXT_RESET << std::endl; } trk_param_fpga.extend_correlation_symbols = extend_correlation_symbols; trk_param_fpga.track_pilot = track_pilot; trk_param_fpga.very_early_late_space_chips = 0.0; trk_param_fpga.very_early_late_space_narrow_chips = 0.0; trk_param_fpga.system = 'E'; char sig_[3] = "5X"; std::memcpy(trk_param_fpga.signal, sig_, 3); int cn0_samples = configuration->property(role + ".cn0_samples", 20); if (FLAGS_cn0_samples != 20) cn0_samples = FLAGS_cn0_samples; trk_param_fpga.cn0_samples = cn0_samples; int cn0_min = configuration->property(role + ".cn0_min", 25); if (FLAGS_cn0_min != 25) cn0_min = FLAGS_cn0_min; trk_param_fpga.cn0_min = cn0_min; int max_lock_fail = configuration->property(role + ".max_lock_fail", 50); if (FLAGS_max_lock_fail != 50) max_lock_fail = FLAGS_max_lock_fail; trk_param_fpga.max_lock_fail = max_lock_fail; double carrier_lock_th = configuration->property(role + ".carrier_lock_th", 0.85); if (FLAGS_carrier_lock_th != 0.85) carrier_lock_th = FLAGS_carrier_lock_th; trk_param_fpga.carrier_lock_th = carrier_lock_th; // FPGA configuration parameters std::string default_device_name = "/dev/uio"; std::string device_name = configuration->property(role + ".devicename", default_device_name); trk_param_fpga.device_name = device_name; unsigned int device_base = configuration->property(role + ".device_base", 27); trk_param_fpga.device_base = device_base; trk_param_fpga.multicorr_type = 1; // 0 -> 3 correlators, 1 -> up to 5+1 correlators //################# PRE-COMPUTE ALL THE CODES ################# unsigned int code_samples_per_chip = 1; auto code_length_chips = static_cast(GALILEO_E5A_CODE_LENGTH_CHIPS); auto *aux_code = static_cast(volk_gnsssdr_malloc(sizeof(gr_complex) * code_length_chips * code_samples_per_chip, volk_gnsssdr_get_alignment())); float *tracking_code; float *data_code; if (trk_param_fpga.track_pilot) { data_code = static_cast(volk_gnsssdr_malloc(code_samples_per_chip * code_length_chips * sizeof(float), volk_gnsssdr_get_alignment())); } tracking_code = static_cast(volk_gnsssdr_malloc(code_samples_per_chip * code_length_chips * sizeof(float), volk_gnsssdr_get_alignment())); d_ca_codes = static_cast(volk_gnsssdr_malloc(static_cast(code_length_chips) * code_samples_per_chip * GALILEO_E5A_NUMBER_OF_CODES * sizeof(int), volk_gnsssdr_get_alignment())); if (trk_param_fpga.track_pilot) { d_data_codes = static_cast(volk_gnsssdr_malloc((static_cast(code_length_chips)) * code_samples_per_chip * GALILEO_E5A_NUMBER_OF_CODES * sizeof(int), volk_gnsssdr_get_alignment())); } for (unsigned int PRN = 1; PRN <= GALILEO_E5A_NUMBER_OF_CODES; PRN++) { galileo_e5_a_code_gen_complex_primary(aux_code, PRN, const_cast(sig_)); if (trk_param_fpga.track_pilot) { for (unsigned int i = 0; i < code_length_chips; i++) { tracking_code[i] = aux_code[i].imag(); data_code[i] = aux_code[i].real(); } for (unsigned int s = 0; s < code_length_chips; s++) { d_ca_codes[static_cast(code_length_chips) * (PRN - 1) + s] = static_cast(tracking_code[s]); d_data_codes[static_cast(code_length_chips) * (PRN - 1) + s] = static_cast(data_code[s]); } } else { for (unsigned int i = 0; i < code_length_chips; i++) { tracking_code[i] = aux_code[i].real(); } for (unsigned int s = 0; s < code_length_chips; s++) { d_ca_codes[static_cast(code_length_chips) * (PRN - 1) + s] = static_cast(tracking_code[s]); } } } volk_gnsssdr_free(aux_code); volk_gnsssdr_free(tracking_code); if (trk_param_fpga.track_pilot) { volk_gnsssdr_free(data_code); } trk_param_fpga.ca_codes = d_ca_codes; trk_param_fpga.data_codes = d_data_codes; trk_param_fpga.code_length_chips = code_length_chips; trk_param_fpga.code_samples_per_chip = code_samples_per_chip; // 2 sample per chip //################# MAKE TRACKING GNURadio object ################### tracking_fpga_sc = dll_pll_veml_make_tracking_fpga(trk_param_fpga); channel_ = 0; DLOG(INFO) << "tracking(" << tracking_fpga_sc->unique_id() << ")"; } GalileoE5aDllPllTrackingFpga::~GalileoE5aDllPllTrackingFpga() { delete[] d_ca_codes; if (d_track_pilot) { delete[] d_data_codes; } } void GalileoE5aDllPllTrackingFpga::start_tracking() { tracking_fpga_sc->start_tracking(); } /* * Set tracking channel unique ID */ void GalileoE5aDllPllTrackingFpga::set_channel(unsigned int channel) { channel_ = channel; tracking_fpga_sc->set_channel(channel); } void GalileoE5aDllPllTrackingFpga::set_gnss_synchro(Gnss_Synchro *p_gnss_synchro) { tracking_fpga_sc->set_gnss_synchro(p_gnss_synchro); } void GalileoE5aDllPllTrackingFpga::connect(gr::top_block_sptr top_block) { if (top_block) { /* top_block is not null */ }; //nothing to connect, now the tracking uses gr_sync_decimator } void GalileoE5aDllPllTrackingFpga::disconnect(gr::top_block_sptr top_block) { if (top_block) { /* top_block is not null */ }; //nothing to disconnect, now the tracking uses gr_sync_decimator } gr::basic_block_sptr GalileoE5aDllPllTrackingFpga::get_left_block() { return tracking_fpga_sc; } gr::basic_block_sptr GalileoE5aDllPllTrackingFpga::get_right_block() { return tracking_fpga_sc; }