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93 lines
3.2 KiB
C
93 lines
3.2 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsLTE 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 Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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/******************************************************************************
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* File: convolution.h
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*
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* Description: Utility module for fast convolution using FFT.
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*
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* Reference:
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*****************************************************************************/
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#ifndef CONVOLUTION_H_
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#define CONVOLUTION_H_
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#include "srslte/config.h"
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#include "srslte/phy/dft/dft.h"
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typedef struct SRSLTE_API {
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cf_t *input_fft;
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cf_t *filter_fft;
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cf_t *output_fft;
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cf_t *output_fft2;
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uint32_t input_len;
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uint32_t filter_len;
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uint32_t output_len;
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srslte_dft_plan_t input_plan;
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srslte_dft_plan_t filter_plan;
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srslte_dft_plan_t output_plan;
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//cf_t *pss_signal_time_fft[3]; // One sequence for each N_id_2
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//cf_t *pss_signal_time[3];
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}srslte_conv_fft_cc_t;
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SRSLTE_API int srslte_conv_fft_cc_init(srslte_conv_fft_cc_t *q,
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uint32_t input_len,
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uint32_t filter_len);
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SRSLTE_API void srslte_conv_fft_cc_free(srslte_conv_fft_cc_t *q);
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SRSLTE_API uint32_t srslte_conv_fft_cc_run(srslte_conv_fft_cc_t *q,
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cf_t *input,
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cf_t *filter,
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cf_t *output);
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SRSLTE_API uint32_t srslte_conv_fft_cc_run_opt(srslte_conv_fft_cc_t *q,
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cf_t *input,
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cf_t *filter_freq,
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cf_t *output);
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SRSLTE_API uint32_t srslte_conv_cc(cf_t *input,
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cf_t *filter,
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cf_t *output,
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uint32_t input_len,
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uint32_t filter_len);
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SRSLTE_API uint32_t srslte_conv_same_cf(cf_t *input,
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float *filter,
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cf_t *output,
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uint32_t input_len,
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uint32_t filter_len);
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SRSLTE_API uint32_t srslte_conv_same_cc(cf_t *input,
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cf_t *filter,
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cf_t *output,
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uint32_t input_len,
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uint32_t filter_len);
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#endif // CONVOLUTION_H_
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