/*! * \file galileo_e5a_noncoherent_iq_acquisition_caf_cc.h * \brief Adapts a PCPS acquisition block to an AcquisitionInterface for * Galileo E5a data and pilot Signals * \author Marc Sales, 2014. marcsales92(at)gmail.com * \based on work from: * * * ----------------------------------------------------------------------------- * * 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_GALILEO_E5A_NONCOHERENT_IQ_ACQUISITION_CAF_CC_H #define GNSS_SDR_GALILEO_E5A_NONCOHERENT_IQ_ACQUISITION_CAF_CC_H #include "channel_fsm.h" #include "gnss_synchro.h" #include #include #include #include #include #include #include #include #if GNURADIO_USES_STD_POINTERS #else #include #endif class galileo_e5a_noncoherentIQ_acquisition_caf_cc; #if GNURADIO_USES_STD_POINTERS using galileo_e5a_noncoherentIQ_acquisition_caf_cc_sptr = std::shared_ptr; #else using galileo_e5a_noncoherentIQ_acquisition_caf_cc_sptr = boost::shared_ptr; #endif galileo_e5a_noncoherentIQ_acquisition_caf_cc_sptr galileo_e5a_noncoherentIQ_make_acquisition_caf_cc( unsigned int sampled_ms, unsigned int max_dwells, unsigned int doppler_max, int64_t fs_in, int samples_per_ms, int samples_per_code, bool bit_transition_flag, bool dump, const std::string& dump_filename, bool both_signal_components_, int CAF_window_hz_, int Zero_padding_, bool enable_monitor_output); /*! * \brief This class implements a Parallel Code Phase Search Acquisition. * * Check \ref Navitec2012 "An Open Source Galileo E1 Software Receiver", * Algorithm 1, for a pseudocode description of this implementation. */ class galileo_e5a_noncoherentIQ_acquisition_caf_cc : public gr::block { public: /*! * \brief Default destructor. */ ~galileo_e5a_noncoherentIQ_acquisition_caf_cc(); /*! * \brief Set acquisition/tracking common Gnss_Synchro object pointer * to exchange synchronization data between acquisition and tracking blocks. * \param p_gnss_synchro Satellite information shared by the processing blocks. */ inline void set_gnss_synchro(Gnss_Synchro* p_gnss_synchro) { d_gnss_synchro = p_gnss_synchro; } /*! * \brief Returns the maximum peak of grid search. */ inline unsigned int mag() const { return d_mag; } /*! * \brief Initializes acquisition algorithm. */ void init(); /*! * \brief Sets local code for PCPS acquisition algorithm. * \param code - Pointer to the PRN code. */ void set_local_code(std::complex* code, std::complex* codeQ); /*! * \brief Starts acquisition algorithm, turning from standby mode to * active mode * \param active - bool that activates/deactivates the block. */ inline void set_active(bool active) { d_active = active; } /*! * \brief If set to 1, ensures that acquisition starts at the * first available sample. * \param state - int=1 forces start of acquisition */ void set_state(int state); /*! * \brief Set acquisition channel unique ID * \param channel - receiver channel. */ inline void set_channel(unsigned int channel) { d_channel = channel; } /*! * \brief Set channel fsm associated to this acquisition instance */ inline void set_channel_fsm(std::weak_ptr channel_fsm) { d_channel_fsm = std::move(channel_fsm); } /*! * \brief Set statistics threshold of PCPS algorithm. * \param threshold - Threshold for signal detection (check \ref Navitec2012, * Algorithm 1, for a definition of this threshold). */ inline void set_threshold(float threshold) { d_threshold = threshold; } /*! * \brief Set maximum Doppler grid search * \param doppler_max - Maximum Doppler shift considered in the grid search [Hz]. */ inline void set_doppler_max(unsigned int doppler_max) { d_doppler_max = doppler_max; } /*! * \brief Set Doppler steps for the grid search * \param doppler_step - Frequency bin of the search grid [Hz]. */ inline void set_doppler_step(unsigned int doppler_step) { d_doppler_step = doppler_step; } /*! * \brief Parallel Code Phase Search Acquisition signal processing. */ 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 galileo_e5a_noncoherentIQ_acquisition_caf_cc_sptr galileo_e5a_noncoherentIQ_make_acquisition_caf_cc( unsigned int sampled_ms, unsigned int max_dwells, unsigned int doppler_max, int64_t fs_in, int samples_per_ms, int samples_per_code, bool bit_transition_flag, bool dump, const std::string& dump_filename, bool both_signal_components_, int CAF_window_hz_, int Zero_padding_, bool enable_monitor_output); galileo_e5a_noncoherentIQ_acquisition_caf_cc( unsigned int sampled_ms, unsigned int max_dwells, unsigned int doppler_max, int64_t fs_in, int samples_per_ms, int samples_per_code, bool bit_transition_flag, bool dump, const std::string& dump_filename, bool both_signal_components_, int CAF_window_hz_, int Zero_padding_, bool enable_monitor_output); void calculate_magnitudes(gr_complex* fft_begin, int doppler_shift, int doppler_offset); float estimate_input_power(gr_complex* in); std::weak_ptr d_channel_fsm; std::unique_ptr d_fft_if; std::unique_ptr d_ifft; std::vector> d_grid_doppler_wipeoffs; std::vector d_fft_code_I_A; std::vector d_fft_code_I_B; std::vector d_fft_code_Q_A; std::vector d_fft_code_Q_B; std::vector d_inbuffer; std::vector d_magnitudeIA; std::vector d_magnitudeIB; std::vector d_magnitudeQA; std::vector d_magnitudeQB; std::vector d_CAF_vector; std::vector d_CAF_vector_I; std::vector d_CAF_vector_Q; std::string d_satellite_str; std::string d_dump_filename; std::ofstream d_dump_file; Gnss_Synchro* d_gnss_synchro; int64_t d_fs_in; uint64_t d_sample_counter; float d_threshold; float d_doppler_freq; float d_mag; float d_input_power; float d_test_statistics; int d_state; int d_samples_per_ms; int d_samples_per_code; int d_CAF_window_hz; int d_buffer_count; int d_doppler_resolution; int d_doppler_max; int d_doppler_step; int d_fft_size; int d_num_doppler_bins; unsigned int d_gr_stream_buffer; unsigned int d_channel; unsigned int d_max_dwells; unsigned int d_well_count; unsigned int d_sampled_ms; unsigned int d_code_phase; bool d_bit_transition_flag; bool d_active; bool d_dump; bool d_both_signal_components; bool d_enable_monitor_output; }; #endif // GNSS_SDR_GALILEO_E5A_NONCOHERENT_IQ_ACQUISITION_CAF_CC_H