mirror of https://github.com/gnss-sdr/gnss-sdr
216 lines
6.5 KiB
C++
216 lines
6.5 KiB
C++
/*!
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* \file galileo_e5a_dll_pll_tracking_cc.h
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* \brief Implementation of a code DLL + carrier PLL
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* tracking block for Galileo E5a signals
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* \author Marc Sales, 2014. marcsales92(at)gmail.com
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* \based on work from:
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* <ul>
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* <li> Javier Arribas, 2011. jarribas(at)cttc.es
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* <li> Luis Esteve, 2012. luis(at)epsilon-formacion.com
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* </ul>
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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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#ifndef GNSS_SDR_GALILEO_E5A_DLL_PLL_TRACKING_CC_H_
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#define GNSS_SDR_GALILEO_E5A_DLL_PLL_TRACKING_CC_H_
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#include <fstream>
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#include <map>
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#include <string>
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#include <gnuradio/block.h>
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#include <gnuradio/msg_queue.h>
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#include "concurrent_queue.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 "cpu_multicorrelator.h"
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class Galileo_E5a_Dll_Pll_Tracking_cc;
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typedef boost::shared_ptr<Galileo_E5a_Dll_Pll_Tracking_cc>
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galileo_e5a_dll_pll_tracking_cc_sptr;
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galileo_e5a_dll_pll_tracking_cc_sptr
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galileo_e5a_dll_pll_make_tracking_cc(long if_freq,
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long fs_in, unsigned
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int vector_length,
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boost::shared_ptr<gr::msg_queue> queue,
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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 pll_bw_init_hz,
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float dll_bw_init_hz,
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int ti_ms,
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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 Galileo_E5a_Dll_Pll_Tracking_cc: public gr::block
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{
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public:
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~Galileo_E5a_Dll_Pll_Tracking_cc();
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void set_channel(unsigned int 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 galileo_e5a_dll_pll_tracking_cc_sptr
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galileo_e5a_dll_pll_make_tracking_cc(long if_freq,
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long fs_in, unsigned
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int vector_length,
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boost::shared_ptr<gr::msg_queue> queue,
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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 pll_bw_init_hz,
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float dll_bw_init_hz,
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int ti_ms,
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float early_late_space_chips);
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Galileo_E5a_Dll_Pll_Tracking_cc(long if_freq,
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long fs_in, unsigned
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int vector_length,
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boost::shared_ptr<gr::msg_queue> queue,
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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 pll_bw_init_hz,
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float dll_bw_init_hz,
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int ti_ms,
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float early_late_space_chips);
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void acquire_secondary();
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// tracking configuration vars
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boost::shared_ptr<gr::msg_queue> d_queue;
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unsigned int d_vector_length;
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int d_current_ti_ms;
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int d_ti_ms;
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bool d_dump;
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Gnss_Synchro* d_acquisition_gnss_synchro;
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unsigned int d_channel;
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long d_if_freq;
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long d_fs_in;
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double d_early_late_spc_chips;
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double d_dll_bw_hz;
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double d_pll_bw_hz;
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double d_dll_bw_init_hz;
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double d_pll_bw_init_hz;
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gr_complex* d_codeQ;
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gr_complex* d_codeI;
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gr_complex d_Early;
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gr_complex d_Prompt;
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gr_complex d_Late;
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gr_complex d_Prompt_data;
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gr_complex* d_Single_Early;
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gr_complex* d_Single_Prompt;
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gr_complex* d_Single_Late;
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gr_complex* d_Single_Prompt_data;
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float tmp_E;
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float tmp_P;
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float tmp_L;
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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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int d_n_correlator_taps;
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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_I;
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cpu_multicorrelator multicorrelator_cpu_Q;
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// tracking vars
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double d_code_freq_chips;
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double d_carrier_doppler_hz;
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double d_acc_carrier_phase_rad;
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double d_code_phase_samples;
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double d_acc_code_phase_secs;
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double d_code_error_filt_secs;
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double d_code_phase_step_chips;
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double d_carrier_phase_step_rad;
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//PRN period in samples
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int d_current_prn_length_samples;
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//processing samples counters
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unsigned long int d_sample_counter;
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unsigned long int d_acq_sample_stamp;
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// CN0 estimation and lock detector
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int 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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int d_carrier_lock_fail_counter;
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// control vars
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int d_state;
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bool d_first_transition;
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// Secondary code acquisition
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bool d_secondary_lock;
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int d_secondary_delay;
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int d_integration_counter;
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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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};
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#endif /* GNSS_SDR_GALILEO_E5A_DLL_PLL_TRACKING_CC_H_ */
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