mirror of https://github.com/PentHertz/srsLTE.git
148 lines
5.5 KiB
C
148 lines
5.5 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: pdsch.h
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*
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* Description: Physical downlink shared channel
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.4
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*****************************************************************************/
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#ifndef SRSLTE_PDSCH_H
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#define SRSLTE_PDSCH_H
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#include "srslte/config.h"
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#include "srslte/phy/ch_estimation/chest_dl.h"
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/phy/mimo/layermap.h"
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#include "srslte/phy/mimo/precoding.h"
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#include "srslte/phy/modem/demod_soft.h"
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#include "srslte/phy/modem/mod.h"
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#include "srslte/phy/phch/dci.h"
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#include "srslte/phy/phch/pdsch_cfg.h"
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#include "srslte/phy/phch/regs.h"
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#include "srslte/phy/phch/sch.h"
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#include "srslte/phy/scrambling/scrambling.h"
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typedef struct {
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srslte_sequence_t seq[SRSLTE_MAX_CODEWORDS][SRSLTE_NOF_SF_X_FRAME];
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uint32_t cell_id;
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bool sequence_generated;
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} srslte_pdsch_user_t;
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/* PDSCH object */
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typedef struct SRSLTE_API {
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srslte_cell_t cell;
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uint32_t nof_rx_antennas;
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uint32_t max_re;
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uint16_t ue_rnti;
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bool is_ue;
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bool llr_is_8bit;
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/* buffers */
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// void buffers are shared for tx and rx
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cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS]; /* Channel estimation (Rx only) */
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cf_t *symbols[SRSLTE_MAX_PORTS]; /* PDSCH Encoded/Decoded Symbols */
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cf_t *x[SRSLTE_MAX_LAYERS]; /* Layer mapped */
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cf_t *d[SRSLTE_MAX_CODEWORDS]; /* Modulated/Demodulated codewords */
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void *e[SRSLTE_MAX_CODEWORDS];
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float *csi[SRSLTE_MAX_CODEWORDS]; /* Channel Strengh Indicator */
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/* tx & rx objects */
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srslte_modem_table_t mod[5];
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// This is to generate the scrambling seq for multiple CRNTIs
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srslte_pdsch_user_t **users;
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srslte_sequence_t tmp_seq;
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srslte_sch_t dl_sch;
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void *coworker_ptr;
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} srslte_pdsch_t;
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typedef struct {
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uint8_t* payload;
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bool crc;
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float avg_iterations_block;
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} srslte_pdsch_res_t;
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SRSLTE_API int srslte_pdsch_init_ue(srslte_pdsch_t *q,
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uint32_t max_prb,
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uint32_t nof_rx_antennas);
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SRSLTE_API int srslte_pdsch_init_enb(srslte_pdsch_t *q,
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uint32_t max_prb);
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SRSLTE_API void srslte_pdsch_free(srslte_pdsch_t *q);
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/* These functions modify the state of the object and may take some time */
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SRSLTE_API int srslte_pdsch_enable_coworker(srslte_pdsch_t* q);
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SRSLTE_API int srslte_pdsch_set_cell(srslte_pdsch_t* q, srslte_cell_t cell);
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SRSLTE_API int srslte_pdsch_set_rnti(srslte_pdsch_t *q,
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uint16_t rnti);
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SRSLTE_API void srslte_pdsch_free_rnti(srslte_pdsch_t* q, uint16_t rnti);
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/* These functions do not modify the state and run in real-time */
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SRSLTE_API int srslte_pdsch_encode(srslte_pdsch_t* q,
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srslte_dl_sf_cfg_t* sf,
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srslte_pdsch_cfg_t* cfg,
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uint8_t* data[SRSLTE_MAX_CODEWORDS],
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cf_t* sf_symbols[SRSLTE_MAX_PORTS]);
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SRSLTE_API int srslte_pdsch_decode(srslte_pdsch_t* q,
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srslte_dl_sf_cfg_t* sf,
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srslte_pdsch_cfg_t* cfg,
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srslte_chest_dl_res_t* channel,
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cf_t* sf_symbols[SRSLTE_MAX_PORTS],
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srslte_pdsch_res_t data[SRSLTE_MAX_CODEWORDS]);
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SRSLTE_API int srslte_pdsch_select_pmi(srslte_pdsch_t* q,
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srslte_chest_dl_res_t* channel,
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uint32_t nof_layers,
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uint32_t* best_pmi,
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float sinr[SRSLTE_MAX_CODEBOOKS]);
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SRSLTE_API int srslte_pdsch_compute_cn(srslte_pdsch_t* q, srslte_chest_dl_res_t* channel, float* cn);
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SRSLTE_API uint32_t srslte_pdsch_grant_rx_info(srslte_pdsch_grant_t* grant,
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srslte_pdsch_res_t res[SRSLTE_MAX_CODEWORDS],
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char* str,
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uint32_t str_len);
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SRSLTE_API uint32_t srslte_pdsch_rx_info(srslte_pdsch_cfg_t* cfg,
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srslte_pdsch_res_t res[SRSLTE_MAX_CODEWORDS],
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char* str,
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uint32_t str_len);
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SRSLTE_API uint32_t srslte_pdsch_tx_info(srslte_pdsch_cfg_t* cfg, char* str, uint32_t str_len);
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#endif // SRSLTE_PDSCH_H
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