/** * * \section COPYRIGHT * * Copyright 2013-2015 Software Radio Systems Limited * * \section LICENSE * * This file is part of the srsLTE library. * * srsLTE is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * srsLTE is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * A copy of the GNU Affero General Public License can be found in * the LICENSE file in the top-level directory of this distribution * and at http://www.gnu.org/licenses/. * */ /****************************************************************************** * File: pdsch.h * * Description: Physical downlink shared channel * * Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.4 *****************************************************************************/ #ifndef PDSCH_ #define PDSCH_ #ifndef SRSLTE_SINGLE_THREAD #include #include #endif /* SRSLTE_SINGLE_THREAD */ #include "srslte/config.h" #include "srslte/phy/common/phy_common.h" #include "srslte/phy/mimo/precoding.h" #include "srslte/phy/mimo/layermap.h" #include "srslte/phy/modem/mod.h" #include "srslte/phy/modem/demod_soft.h" #include "srslte/phy/scrambling/scrambling.h" #include "srslte/phy/phch/dci.h" #include "srslte/phy/phch/regs.h" #include "srslte/phy/phch/sch.h" #include "srslte/phy/phch/pdsch_cfg.h" typedef struct { srslte_sequence_t seq[SRSLTE_MAX_CODEWORDS][SRSLTE_NSUBFRAMES_X_FRAME]; bool sequence_generated; } srslte_pdsch_user_t; #ifndef SRSLTE_SINGLE_THREAD typedef struct { /* Thread identifier: they must set before thread creation */ uint32_t codeword_idx; void *pdsch_ptr; /* Configuration Encoder/Decoder: they must be set before posting start semaphore */ srslte_pdsch_cfg_t *cfg; uint16_t rnti; /* Encoder/Decoder data pointers: they must be set before posting start semaphore */ uint8_t *data; void *softbuffer; /* Execution status */ int ret_status; /* Semaphores */ sem_t start; sem_t finish; /* Thread kill flag */ bool quit; } srslte_pdsch_thread_args_t; #endif /* SRSLTE_SINGLE_THREAD */ /* PDSCH object */ typedef struct SRSLTE_API { srslte_cell_t cell; uint32_t nof_rx_antennas; uint32_t max_re; /* buffers */ // void buffers are shared for tx and rx cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS]; /* Channel estimation (Rx only) */ cf_t *symbols[SRSLTE_MAX_PORTS]; /* PDSCH Encoded/Decoded Symbols */ cf_t *x[SRSLTE_MAX_LAYERS]; /* Layer mapped */ cf_t *d[SRSLTE_MAX_CODEWORDS]; /* Modulated/Demodulated codewords */ void *e[SRSLTE_MAX_CODEWORDS]; /* tx & rx objects */ srslte_modem_table_t mod[4]; // This is to generate the scrambling seq for multiple CRNTIs srslte_pdsch_user_t **users; srslte_sch_t dl_sch[SRSLTE_MAX_CODEWORDS]; #ifndef SRSLTE_SINGLE_THREAD pthread_t threads[SRSLTE_MAX_CODEWORDS]; srslte_pdsch_thread_args_t thread_args[SRSLTE_MAX_CODEWORDS]; #endif /* SRSLTE_SINGLE_THREAD */ } srslte_pdsch_t; SRSLTE_API int srslte_pdsch_init(srslte_pdsch_t *q, srslte_cell_t cell); SRSLTE_API int srslte_pdsch_init_tx_multi(srslte_pdsch_t *q, srslte_cell_t cell); SRSLTE_API int srslte_pdsch_init_rx_multi(srslte_pdsch_t *q, srslte_cell_t cell, uint32_t nof_antennas); SRSLTE_API void srslte_pdsch_free(srslte_pdsch_t *q); SRSLTE_API int srslte_pdsch_set_rnti(srslte_pdsch_t *q, uint16_t rnti); SRSLTE_API void srslte_pdsch_free_rnti(srslte_pdsch_t *q, uint16_t rnti); SRSLTE_API float srslte_pdsch_coderate(uint32_t tbs, uint32_t nof_re); SRSLTE_API int srslte_pdsch_cfg(srslte_pdsch_cfg_t *cfg, srslte_cell_t cell, srslte_ra_dl_grant_t *grant, uint32_t cfi, uint32_t sf_idx, uint32_t rvidx); SRSLTE_API int srslte_pdsch_cfg_multi(srslte_pdsch_cfg_t *cfg, srslte_cell_t cell, srslte_ra_dl_grant_t *grant, uint32_t cfi, uint32_t sf_idx, uint32_t rvidx, uint32_t rvidx2, srslte_mimo_type_t mimo_type, uint32_t pmi); SRSLTE_API int srslte_pdsch_encode(srslte_pdsch_t *q, srslte_pdsch_cfg_t *cfg, srslte_softbuffer_tx_t *softbuffer, uint8_t *data, uint16_t rnti, cf_t *sf_symbols[SRSLTE_MAX_PORTS]); SRSLTE_API int srslte_pdsch_encode_multi(srslte_pdsch_t *q, srslte_pdsch_cfg_t *cfg, srslte_softbuffer_tx_t softbuffers[SRSLTE_MAX_CODEWORDS], uint8_t *data[SRSLTE_MAX_CODEWORDS], uint16_t rnti, cf_t *sf_symbols[SRSLTE_MAX_PORTS]); SRSLTE_API int srslte_pdsch_decode(srslte_pdsch_t *q, srslte_pdsch_cfg_t *cfg, srslte_softbuffer_rx_t *softbuffer, cf_t *sf_symbols, cf_t *ce[SRSLTE_MAX_PORTS], float noise_estimate, uint16_t rnti, uint8_t *data); SRSLTE_API int srslte_pdsch_decode_multi(srslte_pdsch_t *q, srslte_pdsch_cfg_t *cfg, srslte_softbuffer_rx_t softbuffers[SRSLTE_MAX_CODEWORDS], cf_t *sf_symbols[SRSLTE_MAX_PORTS], cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS], float noise_estimate, uint16_t rnti, uint8_t *data[SRSLTE_MAX_CODEWORDS]); SRSLTE_API int srslte_pdsch_ri_pmi_select(srslte_pdsch_t *q, srslte_pdsch_cfg_t *cfg, cf_t *ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS], float noise_estimate, uint32_t nof_ce, uint32_t *ri, uint32_t *pmi, float *current_sinr); SRSLTE_API void srslte_pdsch_set_max_noi(srslte_pdsch_t *q, int max_iter); SRSLTE_API float srslte_pdsch_average_noi(srslte_pdsch_t *q); SRSLTE_API uint32_t srslte_pdsch_last_noi(srslte_pdsch_t *q); #endif