mirror of https://github.com/gnss-sdr/gnss-sdr
87 lines
3.0 KiB
C++
87 lines
3.0 KiB
C++
/*!
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* \file fpga_multicorrelator_8sc.h
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* \brief High optimized CPU vector multiTAP correlator class for lv_16sc_t (short int complex)
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* \authors <ul>
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* <li> Javier Arribas, 2016. jarribas(at)cttc.es
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* </ul>
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*
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* Class that implements a high optimized vector multiTAP correlator class for CPUs
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2015 (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 <http://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef GNSS_SDR_FPGA_MULTICORRELATOR_8SC_H_
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#define GNSS_SDR_FPGA_MULTICORRELATOR_8SC_H_
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#include <volk_gnsssdr/volk_gnsssdr.h>
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// FPGA specific stuff
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//#define MAX_NUM_CORRELATORS 3
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/*!
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* \brief Class that implements carrier wipe-off and correlators.
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*/
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class fpga_multicorrelator_8sc
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{
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public:
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fpga_multicorrelator_8sc();
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~fpga_multicorrelator_8sc();
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bool init(int max_signal_length_samples, int n_correlators);
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bool set_local_code_and_taps(int code_length_chips, const lv_16sc_t* local_code_in, float *shifts_chips);
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bool set_input_output_vectors(lv_16sc_t* corr_out, const lv_16sc_t* sig_in);
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void update_local_code(int correlator_length_samples, float rem_code_phase_chips, float code_phase_step_chips);
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bool Carrier_wipeoff_multicorrelator_resampler(float rem_carrier_phase_in_rad, float phase_step_rad, float rem_code_phase_chips, float code_phase_step_chips, int signal_length_samples);
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bool free();
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private:
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// Allocate the device input vectors
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const lv_16sc_t *d_sig_in;
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lv_16sc_t **d_local_codes_resampled;
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const lv_16sc_t *d_local_code_in;
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lv_16sc_t *d_corr_out;
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float *d_shifts_chips;
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int d_code_length_chips;
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int d_n_correlators;
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// FPGA parameters
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unsigned d_nsamples;
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unsigned d_code_length;
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unsigned d_code_phase_step_chips_num;
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unsigned d_ncorrelators;
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unsigned *d_initial_index; //initial_index[MAX_NUM_CORRELATORS];
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unsigned *d_initial_interp_counter; //initial_interp_counter[MAX_NUM_CORRELATORS];
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int d_rem_carr_phase_rad_int;
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int d_phase_step_rad_int;
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unsigned d_initial_sample_counter;
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char *d_gps_code;
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// FPGA registers
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unsigned map_base[16];
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};
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#endif /* GNSS_SDR_CPU_MULTICORRELATOR_H_ */
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