mirror of https://github.com/PentHertz/srsLTE.git
147 lines
6.1 KiB
C
147 lines
6.1 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: pdcch.h
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*
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* Description: Physical downlink control channel.
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*
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* Reference: 3GPP TS 36.211 version 10.0.0 Release 10 Sec. 6.8
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*****************************************************************************/
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#ifndef SRSLTE_PDCCH_H
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#define SRSLTE_PDCCH_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/fec/convcoder.h"
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#include "srslte/phy/fec/crc.h"
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#include "srslte/phy/fec/rm_conv.h"
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#include "srslte/phy/fec/viterbi.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/regs.h"
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#include "srslte/phy/scrambling/scrambling.h"
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typedef enum SRSLTE_API { SEARCH_UE, SEARCH_COMMON } srslte_pdcch_search_mode_t;
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/* PDCCH object */
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typedef struct SRSLTE_API {
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srslte_cell_t cell;
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uint32_t nof_regs[3];
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uint32_t nof_cce[3];
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uint32_t max_bits;
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uint32_t nof_rx_antennas;
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bool is_ue;
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srslte_regs_t* regs;
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/* buffers */
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cf_t* ce[SRSLTE_MAX_PORTS][SRSLTE_MAX_PORTS];
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cf_t* symbols[SRSLTE_MAX_PORTS];
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cf_t* x[SRSLTE_MAX_PORTS];
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cf_t* d;
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uint8_t* e;
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float rm_f[3 * (SRSLTE_DCI_MAX_BITS + 16)];
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float* llr;
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/* tx & rx objects */
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srslte_modem_table_t mod;
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srslte_sequence_t seq[SRSLTE_NOF_SF_X_FRAME];
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srslte_viterbi_t decoder;
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srslte_crc_t crc;
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} srslte_pdcch_t;
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SRSLTE_API int srslte_pdcch_init_ue(srslte_pdcch_t* q, uint32_t max_prb, uint32_t nof_rx_antennas);
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SRSLTE_API int srslte_pdcch_init_enb(srslte_pdcch_t* q, uint32_t max_prb);
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SRSLTE_API int srslte_pdcch_set_cell(srslte_pdcch_t* q, srslte_regs_t* regs, srslte_cell_t cell);
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SRSLTE_API void srslte_pdcch_set_regs(srslte_pdcch_t* q, srslte_regs_t* regs);
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SRSLTE_API void srslte_pdcch_free(srslte_pdcch_t* q);
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SRSLTE_API float srslte_pdcch_coderate(uint32_t nof_bits, uint32_t l);
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/* Encoding function */
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SRSLTE_API int srslte_pdcch_encode(srslte_pdcch_t* q,
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srslte_dl_sf_cfg_t* sf,
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srslte_dci_msg_t* msg,
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cf_t* sf_symbols[SRSLTE_MAX_PORTS]);
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/* Decoding functions: Extract the LLRs and save them in the srslte_pdcch_t object */
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SRSLTE_API int srslte_pdcch_extract_llr(srslte_pdcch_t* q,
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srslte_dl_sf_cfg_t* sf,
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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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/* Decoding functions: Try to decode a DCI message after calling srslte_pdcch_extract_llr */
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SRSLTE_API int
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srslte_pdcch_decode_msg(srslte_pdcch_t* q, srslte_dl_sf_cfg_t* sf, srslte_dci_cfg_t* dci_cfg, srslte_dci_msg_t* msg);
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SRSLTE_API int
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srslte_pdcch_dci_decode(srslte_pdcch_t* q, float* e, uint8_t* data, uint32_t E, uint32_t nof_bits, uint16_t* crc);
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SRSLTE_API int
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srslte_pdcch_dci_encode(srslte_pdcch_t* q, uint8_t* data, uint8_t* e, uint32_t nof_bits, uint32_t E, uint16_t rnti);
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SRSLTE_API void
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srslte_pdcch_dci_encode_conv(srslte_pdcch_t* q, uint8_t* data, uint32_t nof_bits, uint8_t* coded_data, uint16_t rnti);
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/* Function for generation of UE-specific search space DCI locations */
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SRSLTE_API uint32_t srslte_pdcch_ue_locations(srslte_pdcch_t* q,
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srslte_dl_sf_cfg_t* sf,
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srslte_dci_location_t* locations,
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uint32_t max_locations,
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uint16_t rnti);
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SRSLTE_API uint32_t srslte_pdcch_ue_locations_ncce(uint32_t nof_cce,
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srslte_dci_location_t* c,
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uint32_t max_candidates,
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uint32_t sf_idx,
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uint16_t rnti);
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SRSLTE_API uint32_t srslte_pdcch_ue_locations_ncce_L(uint32_t nof_cce,
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srslte_dci_location_t* c,
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uint32_t max_candidates,
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uint32_t sf_idx,
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uint16_t rnti,
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int L);
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/* Function for generation of common search space DCI locations */
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SRSLTE_API uint32_t srslte_pdcch_common_locations(srslte_pdcch_t* q,
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srslte_dci_location_t* locations,
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uint32_t max_locations,
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uint32_t cfi);
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SRSLTE_API uint32_t srslte_pdcch_common_locations_ncce(uint32_t nof_cce,
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srslte_dci_location_t* c,
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uint32_t max_candidates);
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#endif // SRSLTE_PDCCH_H
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