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80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/*
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* Copyright 2013-2019 Software Radio Systems Limited
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*
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* This file is part of srsLTE.
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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: psss.h
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*
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* Description: Primary sidelink synchronization signal (PSSS) generation and detection.
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*
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*
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* Reference: 3GPP TS 36.211 version 15.6.0 Release 15 Sec. 9.7.1
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*****************************************************************************/
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#ifndef SRSLTE_PSSS_H
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#define SRSLTE_PSSS_H
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#include <stdbool.h>
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#include <stdint.h>
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#include "srslte/config.h"
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/phy/dft/dft.h"
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#define SRSLTE_PSSS_LEN 62
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typedef struct SRSLTE_API {
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cf_t psss_signal[2][SRSLTE_PSSS_LEN]; // One sequence for each N_id_2
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cf_t** psss_sf_freq;
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cf_t* input_pad_freq;
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cf_t* input_pad_time;
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cf_t* dot_prod_output;
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cf_t* dot_prod_output_time;
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cf_t* shifted_output;
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float* shifted_output_abs;
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int32_t corr_peak_pos;
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float corr_peak_value;
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uint32_t N_id_2;
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srslte_dft_plan_t plan_input;
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srslte_dft_plan_t plan_out;
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} srslte_psss_t;
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SRSLTE_API int srslte_psss_init(srslte_psss_t* q, uint32_t nof_prb, srslte_cp_t cp);
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SRSLTE_API int srslte_psss_generate(cf_t* psss_signal, uint32_t N_id_2);
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SRSLTE_API void srslte_psss_put_sf_buffer(cf_t* psss_signal, cf_t* sf_buffer, uint32_t nof_prb, srslte_cp_t cp);
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SRSLTE_API int srslte_psss_find(srslte_psss_t* q, cf_t* input, uint32_t nof_prb, srslte_cp_t cp);
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SRSLTE_API void srslte_psss_free(srslte_psss_t* q);
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#endif // SRSLTE_PSSS_H
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