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174 lines
6.5 KiB
C
174 lines
6.5 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: 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 PDSCH_
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#define PDSCH_
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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/mimo/precoding.h"
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#include "srslte/phy/mimo/layermap.h"
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#include "srslte/phy/modem/mod.h"
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#include "srslte/phy/modem/demod_soft.h"
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#include "srslte/phy/scrambling/scrambling.h"
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#include "srslte/phy/phch/dci.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/phch/pdsch_cfg.h"
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typedef struct {
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srslte_sequence_t seq[SRSLTE_MAX_CODEWORDS][SRSLTE_NSUBFRAMES_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 last_nof_iterations[SRSLTE_MAX_CODEWORDS];
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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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/* Power allocation parameter 3GPP 36.213 Clause 5.2 Rho_b */
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float rho_a;
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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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bool csi_enabled;
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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[4];
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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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} srslte_pdsch_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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SRSLTE_API int srslte_pdsch_set_cell(srslte_pdsch_t *q,
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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_set_power_allocation(srslte_pdsch_t *q,
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float rho_a);
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SRSLTE_API int srslte_pdsch_enable_csi(srslte_pdsch_t *q,
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bool enable);
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SRSLTE_API void srslte_pdsch_free_rnti(srslte_pdsch_t *q,
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uint16_t rnti);
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SRSLTE_API int srslte_pdsch_cfg(srslte_pdsch_cfg_t *cfg,
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srslte_cell_t cell,
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srslte_ra_dl_grant_t *grant,
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uint32_t cfi,
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uint32_t sf_idx,
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int rvidx);
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SRSLTE_API int srslte_pdsch_cfg_mimo(srslte_pdsch_cfg_t *cfg,
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srslte_cell_t cell,
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srslte_ra_dl_grant_t *grant,
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uint32_t cfi,
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uint32_t sf_idx,
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int rvidx[SRSLTE_MAX_CODEWORDS],
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srslte_mimo_type_t mimo_type,
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uint32_t pmi);
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SRSLTE_API int srslte_pdsch_encode(srslte_pdsch_t *q,
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srslte_pdsch_cfg_t *cfg,
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srslte_softbuffer_tx_t *softbuffers[SRSLTE_MAX_CODEWORDS],
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uint8_t *data[SRSLTE_MAX_CODEWORDS],
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uint16_t rnti,
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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_pdsch_cfg_t *cfg,
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srslte_softbuffer_rx_t *softbuffers[SRSLTE_MAX_CODEWORDS],
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cf_t *sf_symbols[SRSLTE_MAX_PORTS],
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cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS],
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float noise_estimate,
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uint16_t rnti,
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uint8_t *data[SRSLTE_MAX_CODEWORDS],
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bool acks[SRSLTE_MAX_CODEWORDS]);
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SRSLTE_API int srslte_pdsch_pmi_select(srslte_pdsch_t *q,
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srslte_pdsch_cfg_t *cfg,
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cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS],
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float noise_estimate,
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uint32_t nof_ce,
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uint32_t pmi[SRSLTE_MAX_LAYERS],
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float sinr[SRSLTE_MAX_LAYERS][SRSLTE_MAX_CODEBOOKS]);
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SRSLTE_API int srslte_pdsch_cn_compute(srslte_pdsch_t *q,
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cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS],
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uint32_t nof_ce,
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float *cn);
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SRSLTE_API void srslte_pdsch_set_max_noi(srslte_pdsch_t *q,
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uint32_t max_iter);
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SRSLTE_API float srslte_pdsch_last_noi(srslte_pdsch_t *q);
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SRSLTE_API uint32_t srslte_pdsch_last_noi_cw(srslte_pdsch_t *q,
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uint32_t cw_idx);
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#endif
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