mirror of https://github.com/gnss-sdr/gnss-sdr
156 lines
5.2 KiB
C++
156 lines
5.2 KiB
C++
/*!
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* \file galileo_telemetry_decoder_gs.h
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* \brief Implementation of a Galileo unified INAV and FNAV message demodulator
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* block
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* \author Javier Arribas 2018. jarribas(at)cttc.es
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* \author Carles Fernandez, 2021. cfernandez(at)cttc.es
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*
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*
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* -----------------------------------------------------------------------------
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*
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* GNSS-SDR is a Global Navigation Satellite System software-defined receiver.
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* This file is part of GNSS-SDR.
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*
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* Copyright (C) 2010-2020 (see AUTHORS file for a list of contributors)
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -----------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_GALILEO_TELEMETRY_DECODER_GS_H
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#define GNSS_SDR_GALILEO_TELEMETRY_DECODER_GS_H
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#include "galileo_cnav_message.h" // for Galileo_Cnav_Message
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#include "galileo_fnav_message.h" // for Galileo_Fnav_Message
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#include "galileo_inav_message.h" // for Galileo_Inav_Message
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#include "gnss_block_interface.h" // for gnss_shared_ptr (adapts smart pointer type to GNU Radio version)
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#include "gnss_satellite.h" // for Gnss_Satellite
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#include "gnss_time.h" // for GnssTime
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#include "nav_message_packet.h" // for Nav_Message_Packet
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#include "tlm_conf.h" // for Tlm_Conf
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#include <boost/circular_buffer.hpp> // for boost::circular_buffer
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#include <gnuradio/block.h> // for block
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#include <gnuradio/types.h> // for gr_vector_const_void_star
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#include <cstdint> // for int32_t, uint32_t
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#include <fstream> // for std::ofstream
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#include <memory> // for std::unique_ptr
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#include <string> // for std::string
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#include <vector> // for std::vector
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/** \addtogroup Telemetry_Decoder
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* \{ */
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/** \addtogroup Telemetry_Decoder_gnuradio_blocks
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* \{ */
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class Viterbi_Decoder; // forward declaration
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class Tlm_CRC_Stats; // forward declaration
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class galileo_telemetry_decoder_gs; // forward declaration
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using galileo_telemetry_decoder_gs_sptr = gnss_shared_ptr<galileo_telemetry_decoder_gs>;
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galileo_telemetry_decoder_gs_sptr galileo_make_telemetry_decoder_gs(
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const Gnss_Satellite &satellite,
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const Tlm_Conf &conf,
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int frame_type);
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/*!
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* \brief This class implements a block that decodes the INAV and FNAV data defined in Galileo ICD
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*/
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class galileo_telemetry_decoder_gs : public gr::block
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{
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public:
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~galileo_telemetry_decoder_gs() override;
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void set_satellite(const Gnss_Satellite &satellite); //!< Set satellite PRN
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void set_channel(int32_t channel); //!< Set receiver's channel
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void reset();
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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) override;
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private:
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friend galileo_telemetry_decoder_gs_sptr galileo_make_telemetry_decoder_gs(
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const Gnss_Satellite &satellite,
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const Tlm_Conf &conf,
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int frame_type);
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galileo_telemetry_decoder_gs(const Gnss_Satellite &satellite, const Tlm_Conf &conf, int frame_type);
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void deinterleaver(int32_t rows, int32_t cols, const float *in, float *out);
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void decode_INAV_word(float *page_part_symbols, int32_t frame_length);
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void decode_FNAV_word(float *page_symbols, int32_t frame_length);
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void decode_CNAV_word(float *page_symbols, int32_t page_length);
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std::unique_ptr<Viterbi_Decoder> d_viterbi;
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std::vector<int32_t> d_preamble_samples;
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std::vector<float> d_page_part_symbols;
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std::string d_dump_filename;
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std::ofstream d_dump_file;
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boost::circular_buffer<float> d_symbol_history;
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Gnss_Satellite d_satellite;
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// navigation message vars
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Galileo_Cnav_Message d_cnav_nav;
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Galileo_Inav_Message d_inav_nav;
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Galileo_Fnav_Message d_fnav_nav;
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Nav_Message_Packet d_nav_msg_packet;
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GnssTime d_current_timetag;
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std::unique_ptr<Tlm_CRC_Stats> d_Tlm_CRC_Stats;
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double d_delta_t; // GPS-GALILEO time offset
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uint64_t d_sample_counter;
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uint64_t d_preamble_index;
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uint64_t d_last_valid_preamble;
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int32_t d_mm;
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int32_t d_codelength;
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int32_t d_datalength;
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int32_t d_frame_type;
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int32_t d_bits_per_preamble;
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int32_t d_samples_per_preamble;
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int32_t d_preamble_period_symbols;
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int32_t d_CRC_error_counter;
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int32_t d_channel;
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int32_t d_flag_even_word_arrived;
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uint32_t d_PRN_code_period_ms;
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uint32_t d_required_symbols;
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uint32_t d_frame_length_symbols;
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uint32_t d_stat;
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uint32_t d_TOW_at_Preamble_ms;
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uint32_t d_TOW_at_current_symbol_ms;
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uint32_t d_max_symbols_without_valid_frame;
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char d_band; // This variable will store which band we are dealing with (Galileo E1 or E5b)
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bool d_sent_tlm_failed_msg;
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bool d_flag_frame_sync;
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bool d_flag_PLL_180_deg_phase_locked;
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bool d_flag_preamble;
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bool d_dump;
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bool d_dump_mat;
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bool d_remove_dat;
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bool d_first_eph_sent;
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bool d_cnav_dummy_page;
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bool d_print_cnav_page;
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bool d_enable_navdata_monitor;
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bool d_dump_crc_stats;
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bool d_enable_reed_solomon_inav;
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bool d_valid_timetag;
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};
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/** \} */
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/** \} */
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#endif // GNSS_SDR_GALILEO_TELEMETRY_DECODER_GS_H
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