mirror of https://github.com/gnss-sdr/gnss-sdr
127 lines
4.8 KiB
C++
127 lines
4.8 KiB
C++
/*!
|
|
* \file beidou_b1i_telemetry_decoder_cc.h
|
|
* \brief Implementation of an adapter of a BEIDOU BI1 DNAV data decoder block
|
|
* to a TelemetryDecoderInterface
|
|
* \details Code added as part of GSoC 2018 program. However new modifications included to mimic
|
|
* decoding of existing signals
|
|
* \author Damian Miralles, 2018. dmiralles2009(at)gmail.com
|
|
* \author Sergi Segura, 2018. sergi.segura.munoz(at)gmail.es
|
|
*
|
|
* -------------------------------------------------------------------------
|
|
*
|
|
* Copyright (C) 2010-2015 (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.
|
|
*
|
|
* GNSS-SDR is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GNSS-SDR is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* -------------------------------------------------------------------------
|
|
*/
|
|
|
|
#ifndef GNSS_SDR_BEIDOU_B1I_TELEMETRY_DECODER_CC_H
|
|
#define GNSS_SDR_BEIDOU_B1I_TELEMETRY_DECODER_CC_H
|
|
|
|
#include "Beidou_B1I.h"
|
|
#include "beidou_dnav_almanac.h"
|
|
#include "beidou_dnav_ephemeris.h"
|
|
#include "beidou_dnav_navigation_message.h"
|
|
#include "beidou_dnav_utc_model.h"
|
|
#include "gnss_satellite.h"
|
|
#include "gnss_synchro.h"
|
|
#include <gnuradio/block.h>
|
|
#include <fstream>
|
|
#include <string>
|
|
|
|
|
|
class beidou_b1i_telemetry_decoder_cc;
|
|
|
|
typedef boost::shared_ptr<beidou_b1i_telemetry_decoder_cc> beidou_b1i_telemetry_decoder_cc_sptr;
|
|
|
|
beidou_b1i_telemetry_decoder_cc_sptr beidou_b1i_make_telemetry_decoder_cc(const Gnss_Satellite &satellite, bool dump);
|
|
|
|
//!!!! edit
|
|
/*!
|
|
* \brief This class implements a block that decodes the GNAV data defined in BEIDOU ICD v5.1
|
|
* \note Code added as part of GSoC 2018 program
|
|
* \see <a href="http://russianspacesystems.ru/wp-content/uploads/2016/08/ICD_GLONASS_eng_v5.1.pdf">GLONASS ICD</a>
|
|
*
|
|
*/
|
|
class beidou_b1i_telemetry_decoder_cc : public gr::block
|
|
{
|
|
public:
|
|
~beidou_b1i_telemetry_decoder_cc(); //!< Class destructor
|
|
void set_satellite(const Gnss_Satellite &satellite); //!< Set satellite PRN
|
|
void set_channel(int channel); //!< Set receiver's channel
|
|
|
|
/*!
|
|
* \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 beidou_b1i_telemetry_decoder_cc_sptr
|
|
beidou_b1i_make_telemetry_decoder_cc(const Gnss_Satellite &satellite, bool dump);
|
|
beidou_b1i_telemetry_decoder_cc(const Gnss_Satellite &satellite, bool dump);
|
|
|
|
void decode_subframe(double *symbols, int32_t frame_length);
|
|
void decode_word(int32_t word_counter, const double *enc_word_symbols, int32_t *dec_word_symbols);
|
|
void decode_bch15_11_01(const int32_t *bits, int32_t *decbits);
|
|
|
|
|
|
//!< Preamble decoding
|
|
unsigned short int d_preambles_symbols[BEIDOU_DNAV_PREAMBLE_LENGTH_SYMBOLS];
|
|
int32_t *d_preamble_samples;
|
|
int32_t *d_secondary_code_symbols;
|
|
uint32_t d_samples_per_symbol;
|
|
int32_t d_symbols_per_preamble;
|
|
int32_t d_samples_per_preamble;
|
|
int32_t d_preamble_period_samples;
|
|
double *d_subframe_symbols;
|
|
uint32_t d_subframe_length_symbols;
|
|
uint32_t d_required_symbols;
|
|
|
|
//!< Storage for incoming data
|
|
std::deque<float> d_symbol_history;
|
|
|
|
//!< Variables for internal functionality
|
|
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
|
|
bool d_flag_frame_sync; //!< Indicate when a frame sync is achieved
|
|
bool d_flag_preamble; //!< Flag indicating when preamble was found
|
|
int32_t d_CRC_error_counter; //!< Number of failed CRC operations
|
|
bool flag_SOW_set; //!< Indicates when time of week is set
|
|
|
|
//!< Navigation Message variable
|
|
Beidou_Dnav_Navigation_Message d_nav;
|
|
|
|
//!< Values to populate gnss synchronization structure
|
|
uint32_t d_TOW_at_Preamble_ms;
|
|
uint32_t d_TOW_at_current_symbol_ms;
|
|
bool Flag_valid_word;
|
|
|
|
//!< Satellite Information and logging capacity
|
|
Gnss_Satellite d_satellite;
|
|
int32_t d_channel;
|
|
bool d_dump;
|
|
std::string d_dump_filename;
|
|
std::ofstream d_dump_file;
|
|
};
|
|
|
|
#endif
|