/*! * \file glonass_l2_ca_telemetry_decoder_gs.h * \brief Implementation of a GLONASS L2 C/A NAV data decoder block * \author Damian Miralles, 2018. dmiralles2009(at)gmail.com * * ----------------------------------------------------------------------------- * * Copyright (C) 2010-2020 (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. * * SPDX-License-Identifier: GPL-3.0-or-later * * ----------------------------------------------------------------------------- */ #ifndef GNSS_SDR_GLONASS_L2_CA_TELEMETRY_DECODER_GS_H #define GNSS_SDR_GLONASS_L2_CA_TELEMETRY_DECODER_GS_H #include "GLONASS_L1_L2_CA.h" #include "glonass_gnav_navigation_message.h" #include "gnss_block_interface.h" #include "gnss_satellite.h" #include "gnss_synchro.h" #include #include #include // for gr_vector_const_void_star #include #include #include #include /** \addtogroup Telemetry_Decoder * \{ */ /** \addtogroup Telemetry_Decoder_gnuradio_blocks * \{ */ class glonass_l2_ca_telemetry_decoder_gs; using glonass_l2_ca_telemetry_decoder_gs_sptr = gnss_shared_ptr; glonass_l2_ca_telemetry_decoder_gs_sptr glonass_l2_ca_make_telemetry_decoder_gs( const Gnss_Satellite &satellite, bool dump); /*! * \brief This class implements a block that decodes the GNAV data defined in GLONASS ICD v5.1 * \see GLONASS ICD * */ class glonass_l2_ca_telemetry_decoder_gs : public gr::block { public: ~glonass_l2_ca_telemetry_decoder_gs(); //!< Class destructor void set_satellite(const Gnss_Satellite &satellite); //!< Set satellite PRN void set_channel(int32_t channel); //!< Set receiver's channel inline void reset() { return; } /*! * \brief This is where all signal processing takes place */ int general_work(int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items); private: friend glonass_l2_ca_telemetry_decoder_gs_sptr glonass_l2_ca_make_telemetry_decoder_gs( const Gnss_Satellite &satellite, bool dump); glonass_l2_ca_telemetry_decoder_gs(const Gnss_Satellite &satellite, bool dump); const std::array d_preambles_bits{GLONASS_GNAV_PREAMBLE}; const int32_t d_symbols_per_preamble = GLONASS_GNAV_PREAMBLE_LENGTH_SYMBOLS; void decode_string(const double *symbols, int32_t frame_length); // Storage for incoming data boost::circular_buffer d_symbol_history; std::array d_preambles_symbols{}; // Navigation Message variable Glonass_Gnav_Navigation_Message d_nav; Gnss_Satellite d_satellite; std::string d_dump_filename; std::ofstream d_dump_file; double d_preamble_time_samples; double delta_t; // GPS-GLONASS time offset double d_TOW_at_current_symbol; uint64_t d_sample_counter; // Sample counter as an index (1,2,3,..etc) indicating number of samples processed uint64_t d_preamble_index; // Index of sample number where preamble was found uint32_t d_stat; // Status of decoder int32_t d_CRC_error_counter; // Number of failed CRC operations int32_t d_channel; bool Flag_valid_word; bool d_flag_frame_sync; // Indicate when a frame sync is achieved bool d_flag_parity; // Flag indicating when parity check was achieved (crc check) bool d_flag_preamble; // Flag indicating when preamble was found bool flag_TOW_set; // Indicates when time of week is set bool d_dump; }; /** \} */ /** \} */ #endif // GNSS_SDR_GLONASS_L2_CA_TELEMETRY_DECODER_GS_H