mirror of https://github.com/gnss-sdr/gnss-sdr
172 lines
5.1 KiB
C++
172 lines
5.1 KiB
C++
/*!
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* \file glonass_l1_ca_dll_pll_tracking_cc.h
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* \brief Implementation of a code DLL + carrier PLL tracking block
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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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* \author Damian Miralles, 2017. dmiralles2009(at)gmail.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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* Copyright (C) 2010-2018 (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 <https://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_GLONASS_L1_CA_DLL_PLL_TRACKING_CC_H
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#define GNSS_SDR_GLONASS_L1_CA_DLL_PLL_TRACKING_CC_H
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#include "cpu_multicorrelator.h"
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#include "gnss_synchro.h"
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#include "tracking_2nd_DLL_filter.h"
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#include "tracking_2nd_PLL_filter.h"
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#include <gnuradio/block.h>
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#include <fstream>
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#include <map>
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#include <string>
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class Glonass_L1_Ca_Dll_Pll_Tracking_cc;
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using glonass_l1_ca_dll_pll_tracking_cc_sptr = boost::shared_ptr<Glonass_L1_Ca_Dll_Pll_Tracking_cc>;
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glonass_l1_ca_dll_pll_tracking_cc_sptr
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glonass_l1_ca_dll_pll_make_tracking_cc(
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int64_t fs_in, uint32_t vector_length,
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bool dump,
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std::string dump_filename,
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float pll_bw_hz,
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float dll_bw_hz,
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float early_late_space_chips);
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/*!
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* \brief This class implements a DLL + PLL tracking loop block
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*/
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class Glonass_L1_Ca_Dll_Pll_Tracking_cc : public gr::block
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{
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public:
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~Glonass_L1_Ca_Dll_Pll_Tracking_cc();
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void set_channel(uint32_t channel);
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void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro);
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void start_tracking();
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int general_work(int noutput_items, gr_vector_int& ninput_items,
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gr_vector_const_void_star& input_items, gr_vector_void_star& output_items);
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void forecast(int noutput_items, gr_vector_int& ninput_items_required);
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private:
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friend glonass_l1_ca_dll_pll_tracking_cc_sptr
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glonass_l1_ca_dll_pll_make_tracking_cc(
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int64_t fs_in, uint32_t vector_length,
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bool dump,
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std::string dump_filename,
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float pll_bw_hz,
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float dll_bw_hz,
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float early_late_space_chips);
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Glonass_L1_Ca_Dll_Pll_Tracking_cc(
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int64_t fs_in, uint32_t vector_length,
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bool dump,
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std::string dump_filename,
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float pll_bw_hz,
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float dll_bw_hz,
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float early_late_space_chips);
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// tracking configuration vars
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uint32_t d_vector_length;
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bool d_dump;
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Gnss_Synchro* d_acquisition_gnss_synchro;
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uint32_t d_channel;
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int64_t d_fs_in;
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int64_t d_glonass_freq_ch;
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double d_early_late_spc_chips;
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// remaining code phase and carrier phase between tracking loops
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double d_rem_code_phase_samples;
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double d_rem_code_phase_chips;
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double d_rem_carr_phase_rad;
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// PLL and DLL filter library
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Tracking_2nd_DLL_filter d_code_loop_filter;
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Tracking_2nd_PLL_filter d_carrier_loop_filter;
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// acquisition
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double d_acq_code_phase_samples;
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double d_acq_carrier_doppler_hz;
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// correlator
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int32_t d_n_correlator_taps;
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gr_complex* d_ca_code;
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float* d_local_code_shift_chips;
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gr_complex* d_correlator_outs;
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Cpu_Multicorrelator multicorrelator_cpu;
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// tracking vars
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double d_code_freq_chips;
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double d_code_phase_step_chips;
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double d_carrier_doppler_hz;
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double d_carrier_doppler_phase_step_rad;
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double d_carrier_frequency_hz;
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double d_carrier_phase_step_rad;
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double d_acc_carrier_phase_rad;
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double d_code_phase_samples;
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//PRN period in samples
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int32_t d_current_prn_length_samples;
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//processing samples counters
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uint64_t d_sample_counter;
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uint64_t d_acq_sample_stamp;
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// CN0 estimation and lock detector
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int32_t d_cn0_estimation_counter;
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gr_complex* d_Prompt_buffer;
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double d_carrier_lock_test;
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double d_CN0_SNV_dB_Hz;
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double d_carrier_lock_threshold;
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int32_t d_carrier_lock_fail_counter;
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// control vars
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bool d_enable_tracking;
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bool d_pull_in;
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// file dump
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std::string d_dump_filename;
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std::ofstream d_dump_file;
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std::map<std::string, std::string> systemName;
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std::string sys;
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int32_t save_matfile();
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};
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#endif //GNSS_SDR_GLONASS_L1_CA_DLL_PLL_TRACKING_CC_H
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