mirror of https://github.com/gnss-sdr/gnss-sdr
71 lines
3.2 KiB
C++
71 lines
3.2 KiB
C++
/*!
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* \file correlator.h
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* \brief High optimized vector correlator class
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* \authors <ul>
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* <li> Javier Arribas, 2011. jarribas(at)cttc.es
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* <li> Luis Esteve, 2012. luis(at)epsilon-formacion.com
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* </ul>
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*
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* Class that implements a high optimized vector correlator class
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* using the volk library
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2014 (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_CORRELATOR_H_
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#define GNSS_SDR_CORRELATOR_H_
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#include <string>
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#include <volk/volk.h>
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#include <gnuradio/gr_complex.h>
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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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* Implemented versions:
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* - Generic: Standard C++ implementation.
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* - Volk: uses VOLK (Vector-Optimized Library of Kernels) and uses the processor's SIMD instruction sets. See http://gnuradio.org/redmine/projects/gnuradio/wiki/Volk
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*
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*/
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class Correlator
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{
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public:
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void Carrier_wipeoff_and_EPL_generic(int signal_length_samples, const gr_complex* input, gr_complex* carrier, gr_complex* E_code, gr_complex* P_code, gr_complex* L_code, gr_complex* E_out, gr_complex* P_out, gr_complex* L_out);
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void Carrier_wipeoff_and_EPL_volk(int signal_length_samples, const gr_complex* input, gr_complex* carrier, gr_complex* E_code, gr_complex* P_code, gr_complex* L_code, gr_complex* E_out, gr_complex* P_out, gr_complex* L_out, bool input_vector_unaligned);
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void Carrier_wipeoff_and_EPL_volk_custom(int signal_length_samples, const gr_complex* input, gr_complex* carrier, gr_complex* E_code, gr_complex* P_code, gr_complex* L_code, gr_complex* E_out, gr_complex* P_out, gr_complex* L_out, bool input_vector_unaligned);
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void Carrier_wipeoff_and_VEPL_volk(int signal_length_samples, const gr_complex* input, gr_complex* carrier, gr_complex* VE_code, gr_complex* E_code, gr_complex* P_code, gr_complex* L_code, gr_complex* VL_code, gr_complex* VE_out, gr_complex* E_out, gr_complex* P_out, gr_complex* L_out, gr_complex* VL_out, bool input_vector_unaligned);
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Correlator();
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~Correlator();
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private:
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std::string volk_32fc_x2_multiply_32fc_a_best_arch;
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std::string volk_32fc_x2_dot_prod_32fc_a_best_arch;
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unsigned long next_power_2(unsigned long v);
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void cpu_arch_test_volk_32fc_x2_dot_prod_32fc_a();
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void cpu_arch_test_volk_32fc_x2_multiply_32fc_a();
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};
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#endif
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