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125 lines
4.6 KiB
C
125 lines
4.6 KiB
C
4 years ago
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/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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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 SRSRAN_PDSCH_H
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#define SRSRAN_PDSCH_H
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#include "srsran/config.h"
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#include "srsran/phy/ch_estimation/chest_dl.h"
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#include "srsran/phy/common/phy_common.h"
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#include "srsran/phy/mimo/layermap.h"
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#include "srsran/phy/mimo/precoding.h"
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#include "srsran/phy/modem/demod_soft.h"
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#include "srsran/phy/modem/evm.h"
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#include "srsran/phy/modem/mod.h"
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#include "srsran/phy/phch/dci.h"
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#include "srsran/phy/phch/pdsch_cfg.h"
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#include "srsran/phy/phch/regs.h"
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#include "srsran/phy/phch/sch.h"
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#include "srsran/phy/scrambling/scrambling.h"
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/* PDSCH object */
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typedef struct SRSRAN_API {
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srsran_cell_t cell;
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uint32_t nof_rx_antennas;
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uint32_t max_re;
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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[SRSRAN_MAX_PORTS][SRSRAN_MAX_PORTS]; /* Channel estimation (Rx only) */
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cf_t* symbols[SRSRAN_MAX_PORTS]; /* PDSCH Encoded/Decoded Symbols */
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cf_t* x[SRSRAN_MAX_LAYERS]; /* Layer mapped */
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cf_t* d[SRSRAN_MAX_CODEWORDS]; /* Modulated/Demodulated codewords */
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void* e[SRSRAN_MAX_CODEWORDS];
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float* csi[SRSRAN_MAX_CODEWORDS]; /* Channel Strengh Indicator */
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/* tx & rx objects */
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srsran_modem_table_t mod[SRSRAN_MOD_NITEMS];
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// EVM buffers, one for each codeword (avoid concurrency issue with coworker)
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srsran_evm_buffer_t* evm_buffer[SRSRAN_MAX_CODEWORDS];
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float avg_evm;
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srsran_sch_t dl_sch;
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void* coworker_ptr;
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} srsran_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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float evm;
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} srsran_pdsch_res_t;
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SRSRAN_API int srsran_pdsch_init_ue(srsran_pdsch_t* q, uint32_t max_prb, uint32_t nof_rx_antennas);
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SRSRAN_API int srsran_pdsch_init_enb(srsran_pdsch_t* q, uint32_t max_prb);
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SRSRAN_API void srsran_pdsch_free(srsran_pdsch_t* q);
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/* These functions modify the state of the object and may take some time */
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SRSRAN_API int srsran_pdsch_enable_coworker(srsran_pdsch_t* q);
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SRSRAN_API int srsran_pdsch_set_cell(srsran_pdsch_t* q, srsran_cell_t cell);
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/* These functions do not modify the state and run in real-time */
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SRSRAN_API int srsran_pdsch_encode(srsran_pdsch_t* q,
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srsran_dl_sf_cfg_t* sf,
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srsran_pdsch_cfg_t* cfg,
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uint8_t* data[SRSRAN_MAX_CODEWORDS],
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cf_t* sf_symbols[SRSRAN_MAX_PORTS]);
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SRSRAN_API int srsran_pdsch_decode(srsran_pdsch_t* q,
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srsran_dl_sf_cfg_t* sf,
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srsran_pdsch_cfg_t* cfg,
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srsran_chest_dl_res_t* channel,
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cf_t* sf_symbols[SRSRAN_MAX_PORTS],
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srsran_pdsch_res_t data[SRSRAN_MAX_CODEWORDS]);
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SRSRAN_API int srsran_pdsch_select_pmi(srsran_pdsch_t* q,
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srsran_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[SRSRAN_MAX_CODEBOOKS]);
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SRSRAN_API int srsran_pdsch_compute_cn(srsran_pdsch_t* q, srsran_chest_dl_res_t* channel, float* cn);
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SRSRAN_API uint32_t srsran_pdsch_grant_rx_info(srsran_pdsch_grant_t* grant,
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srsran_pdsch_res_t res[SRSRAN_MAX_CODEWORDS],
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char* str,
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uint32_t str_len);
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SRSRAN_API uint32_t srsran_pdsch_rx_info(srsran_pdsch_cfg_t* cfg,
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srsran_pdsch_res_t res[SRSRAN_MAX_CODEWORDS],
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char* str,
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uint32_t str_len);
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SRSRAN_API uint32_t srsran_pdsch_tx_info(srsran_pdsch_cfg_t* cfg, char* str, uint32_t str_len);
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#endif // SRSRAN_PDSCH_H
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