mirror of https://github.com/PentHertz/srsLTE.git
128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/*
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* Copyright 2013-2020 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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#ifndef SRSLTE_PSSCH_H
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#define SRSLTE_PSSCH_H
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#include "srslte/phy/common/phy_common_sl.h"
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#include "srslte/phy/dft/dft_precoding.h"
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#include "srslte/phy/fec/crc.h"
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#include "srslte/phy/fec/turbo/turbocoder.h"
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#include "srslte/phy/fec/turbo/turbodecoder.h"
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#include "srslte/phy/modem/mod.h"
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#include "srslte/phy/scrambling/scrambling.h"
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/**
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* \brief Physical Sidelink shared channel.
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*
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* Reference: 3GPP TS 36.211 version 15.6.0 Release 15 Sec. 9.3
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*/
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// Redundancy version
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static const uint8_t srslte_pssch_rv[4] = {0, 2, 3, 1};
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typedef struct SRSLTE_API {
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uint32_t prb_start_idx; // PRB start idx to map RE from RIV
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uint32_t nof_prb; // PSSCH nof_prbs, Length of continuous PRB to map RE (in the pool) from RIV
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uint32_t N_x_id;
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uint32_t mcs_idx;
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uint32_t rv_idx;
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uint32_t sf_idx; // PSSCH sf_idx
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} srslte_pssch_cfg_t;
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typedef struct SRSLTE_API {
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srslte_cell_sl_t cell;
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srslte_sl_comm_resource_pool_t sl_comm_resource_pool;
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srslte_pssch_cfg_t pssch_cfg;
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srslte_cbsegm_t cb_segm;
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uint32_t G;
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uint32_t E;
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uint32_t Qm;
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uint32_t nof_data_symbols;
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uint32_t nof_tx_symbols;
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uint32_t nof_data_re; // Number of RE considered during the channel mapping
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uint32_t nof_tx_re; // Number of RE actually transmitted over the air (without last OFDM symbol)
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uint32_t sl_sch_tb_len;
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uint32_t scfdma_symbols_len;
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// data
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uint8_t* b;
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// crc
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uint8_t* c_r;
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uint8_t* c_r_bytes;
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uint8_t* tb_crc_temp;
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srslte_crc_t tb_crc;
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uint8_t* cb_crc_temp;
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srslte_crc_t cb_crc;
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// channel coding
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uint8_t* d_r;
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int16_t* d_r_16;
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srslte_tcod_t tcod;
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srslte_tdec_t tdec;
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// rate matching
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uint8_t* e_r;
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int16_t* e_r_16;
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uint8_t* buff_b;
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uint8_t* codeword;
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uint8_t* codeword_bytes;
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int16_t* llr;
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// interleaving
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uint8_t* f;
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uint8_t* f_bytes;
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int16_t* f_16;
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uint32_t* interleaver_lut;
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// scrambling
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srslte_sequence_t scrambling_seq;
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// modulation
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srslte_mod_t mod_idx;
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srslte_modem_table_t mod[SRSLTE_MOD_NITEMS];
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cf_t* symbols;
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uint8_t* bits_after_demod;
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uint8_t* bytes_after_demod;
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// dft precoding
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srslte_dft_precoding_t dft_precoder;
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cf_t* scfdma_symbols;
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srslte_dft_precoding_t idft_precoder;
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} srslte_pssch_t;
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SRSLTE_API int
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srslte_pssch_init(srslte_pssch_t* q, srslte_cell_sl_t cell, srslte_sl_comm_resource_pool_t sl_comm_resource_pool);
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SRSLTE_API int srslte_pssch_set_cfg(srslte_pssch_t* q, srslte_pssch_cfg_t pssch_cfg);
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SRSLTE_API int srslte_pssch_encode(srslte_pssch_t* q, uint8_t* input, uint32_t input_len, cf_t* sf_buffer);
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SRSLTE_API int srslte_pssch_decode(srslte_pssch_t* q, cf_t* equalized_sf_syms, uint8_t* output, uint32_t output_len);
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SRSLTE_API int srslte_pssch_put(srslte_pssch_t* q, cf_t* sf_buffer, cf_t* symbols);
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SRSLTE_API int srslte_pssch_get(srslte_pssch_t* q, cf_t* sf_buffer, cf_t* symbols);
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SRSLTE_API void srslte_pssch_free(srslte_pssch_t* q);
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#endif // SRSLTE_PSSCH_H
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