mirror of https://github.com/gnss-sdr/gnss-sdr
158 lines
5.2 KiB
C++
158 lines
5.2 KiB
C++
/*!
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* \file signal_generator_c.h
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* \brief GNU Radio source block that generates synthesized GNSS signal.
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* \author Marc Molina, 2013. marc.molina.pena@gmail.com
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2019 (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 <https://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_SIGNAL_GENERATOR_C_H_
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#define GNSS_SDR_SIGNAL_GENERATOR_C_H_
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#include "gnss_signal.h"
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#include <gnuradio/block.h>
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#include <random>
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#include <string>
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#include <vector>
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class signal_generator_c;
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/*
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* We use boost::shared_ptr's instead of raw pointers for all access
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* to gr_blocks (and many other data structures). The shared_ptr gets
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* us transparent reference counting, which greatly simplifies storage
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* management issues.
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*
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* See https://www.boost.org/doc/libs/release/libs/smart_ptr/doc/html/smart_ptr.html
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*
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* As a convention, the _sptr suffix indicates a boost::shared_ptr
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*/
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using signal_generator_c_sptr = boost::shared_ptr<signal_generator_c>;
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/*!
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* \brief Return a shared_ptr to a new instance of gen_source.
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*
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* To avoid accidental use of raw pointers, gen_source's
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* constructor is private. signal_make_generator_c is the public
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* interface for creating new instances.
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*/
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signal_generator_c_sptr signal_make_generator_c(
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const std::vector<std::string> &signal1,
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const std::vector<std::string> &system,
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const std::vector<unsigned int> &PRN,
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const std::vector<float> &CN0_dB,
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const std::vector<float> &doppler_Hz,
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const std::vector<unsigned int> &delay_chips,
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const std::vector<unsigned int> &delay_sec,
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bool data_flag,
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bool noise_flag,
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unsigned int fs_in,
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unsigned int vector_length,
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float BW_BB);
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/*!
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* \brief This class generates synthesized GNSS signal.
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* \ingroup block
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*
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* \sa gen_source for a version that subclasses gr_block.
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*/
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class signal_generator_c : public gr::block
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{
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public:
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~signal_generator_c() = default; // public destructor
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// Where all the action really happens
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int general_work(int noutput_items,
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gr_vector_int &ninput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items);
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private:
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friend signal_generator_c_sptr signal_make_generator_c(
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const std::vector<std::string> &signal1,
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const std::vector<std::string> &system,
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const std::vector<unsigned int> &PRN,
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const std::vector<float> &CN0_dB,
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const std::vector<float> &doppler_Hz,
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const std::vector<unsigned int> &delay_chips,
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const std::vector<unsigned int> &delay_sec,
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bool data_flag,
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bool noise_flag,
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unsigned int fs_in,
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unsigned int vector_length,
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float BW_BB);
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signal_generator_c(
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std::vector<std::string> signal1,
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std::vector<std::string> system,
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const std::vector<unsigned int> &PRN,
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std::vector<float> CN0_dB,
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std::vector<float> doppler_Hz,
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std::vector<unsigned int> delay_chips,
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std::vector<unsigned int> delay_sec,
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bool data_flag,
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bool noise_flag,
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unsigned int fs_in,
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unsigned int vector_length,
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float BW_BB);
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void init();
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void generate_codes();
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std::vector<std::string> signal_;
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std::vector<std::string> system_;
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std::vector<unsigned int> PRN_;
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std::vector<float> CN0_dB_;
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std::vector<float> doppler_Hz_;
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std::vector<unsigned int> delay_chips_;
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std::vector<unsigned int> delay_sec_;
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bool data_flag_;
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bool noise_flag_;
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unsigned int fs_in_;
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unsigned int num_sats_;
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unsigned int vector_length_;
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float BW_BB_;
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std::vector<unsigned int> samples_per_code_;
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std::vector<unsigned int> num_of_codes_per_vector_;
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std::vector<unsigned int> data_bit_duration_ms_;
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std::vector<unsigned int> ms_counter_;
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std::vector<float> start_phase_rad_;
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std::vector<gr_complex> current_data_bits_;
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std::vector<signed int> current_data_bit_int_;
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std::vector<signed int> data_modulation_;
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std::vector<signed int> pilot_modulation_;
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std::vector<std::vector<gr_complex>> sampled_code_data_;
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std::vector<std::vector<gr_complex>> sampled_code_pilot_;
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std::vector<gr_complex> complex_phase_;
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unsigned int work_counter_{};
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std::random_device r;
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std::uniform_int_distribution<int> uniform_dist;
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std::normal_distribution<float> normal_dist;
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};
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#endif // GNSS_SDR_SIGNAL_GENERATOR_C_H_
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