mirror of https://github.com/gnss-sdr/gnss-sdr
119 lines
3.7 KiB
C++
119 lines
3.7 KiB
C++
/*!
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* \file galileo_e1b_telemetry_decoder_cc.h
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* \brief Interface of a Galileo INAV message demodulator block
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* \author Javier Arribas 2013 jarribas(at)cttc.es,
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* Mara Branzanti 2013 mara.branzanti(at)gmail.com
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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_E1B_TELEMETRY_DECODER_CC_H
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#define GNSS_SDR_GALILEO_E1B_TELEMETRY_DECODER_CC_H
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#include <fstream>
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#include <string>
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#include <gnuradio/block.h>
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#include "Galileo_E1.h"
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#include "concurrent_queue.h"
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#include "gnss_satellite.h"
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#include "galileo_navigation_message.h"
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#include "galileo_ephemeris.h"
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#include "galileo_almanac.h"
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#include "galileo_iono.h"
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#include "galileo_utc_model.h"
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#include "gnss_synchro.h"
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class galileo_e1b_telemetry_decoder_cc;
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typedef boost::shared_ptr<galileo_e1b_telemetry_decoder_cc> galileo_e1b_telemetry_decoder_cc_sptr;
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galileo_e1b_telemetry_decoder_cc_sptr galileo_e1b_make_telemetry_decoder_cc(const Gnss_Satellite & satellite, bool dump);
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/*!
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* \brief This class implements a block that decodes the INAV data defined in Galileo ICD
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*
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*/
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class galileo_e1b_telemetry_decoder_cc : public gr::block
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{
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public:
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~galileo_e1b_telemetry_decoder_cc();
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void set_satellite(const Gnss_Satellite & satellite); //!< Set satellite PRN
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void set_channel(int channel); //!< Set receiver's channel
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int flag_even_word_arrived;
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/*!
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* \brief This is where all signal processing takes place
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*/
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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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private:
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friend galileo_e1b_telemetry_decoder_cc_sptr
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galileo_e1b_make_telemetry_decoder_cc(const Gnss_Satellite & satellite, bool dump);
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galileo_e1b_telemetry_decoder_cc(const Gnss_Satellite & satellite, bool dump);
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void viterbi_decoder(double *page_part_symbols, int *page_part_bits);
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void deinterleaver(int rows, int cols, double *in, double *out);
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void decode_word(double *symbols,int frame_length);
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unsigned short int d_preambles_bits[GALILEO_INAV_PREAMBLE_LENGTH_BITS];
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int *d_preambles_symbols;
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unsigned int d_samples_per_symbol;
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int d_symbols_per_preamble;
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std::deque<Gnss_Synchro> d_symbol_history;
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long unsigned int d_sample_counter;
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long unsigned int d_preamble_index;
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unsigned int d_stat;
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bool d_flag_frame_sync;
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bool d_flag_parity;
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bool d_flag_preamble;
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int d_CRC_error_counter;
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// navigation message vars
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Galileo_Navigation_Message d_nav;
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bool d_dump;
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Gnss_Satellite d_satellite;
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int d_channel;
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double d_TOW_at_current_symbol;
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bool flag_TOW_set;
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double delta_t; //GPS-GALILEO time offset
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std::string d_dump_filename;
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std::ofstream d_dump_file;
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};
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#endif
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