mirror of https://github.com/PentHertz/srsLTE.git
115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/*
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* Copyright 2013-2020 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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#ifndef SRSLTE_DMRS_PDSCH_H
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#define SRSLTE_DMRS_PDSCH_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "srslte/phy/common/phy_common.h"
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#include "srslte/srslte.h"
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#include <stdint.h>
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#define SRSLTE_DMRS_PDSCH_MAX_SYMBOLS 4
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#define SRSLTE_DMRS_PDSCH_TYPEA_SINGLE_DURATION_MIN 3
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#define SRSLTE_DMRS_PDSCH_TYPEA_DOUBLE_DURATION_MIN 4
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typedef enum {
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srslte_dmrs_pdsch_type_1 = 0, // 1 pilot every 2 sub-carriers (default)
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srslte_dmrs_pdsch_type_2 // 2 consecutive pilots every 6 sub-carriers
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} srslte_dmrs_pdsch_type_t;
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typedef enum {
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srslte_dmrs_pdsch_len_1 = 0, // single, 1 symbol long (default)
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srslte_dmrs_pdsch_len_2 // double, 2 symbol long
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} srslte_dmrs_pdsch_len_t;
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/**
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* Determines whether the first pilot goes into symbol index 2 or 3
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*/
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typedef enum {
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srslte_dmrs_pdsch_typeA_pos_2 = 0, // Start in slot symbol index 2 (default)
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srslte_dmrs_pdsch_typeA_pos_3 // Start in slot symbol index 3
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} srslte_dmrs_pdsch_typeA_pos_t;
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/**
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* Determines additional symbols if possible to be added
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*/
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typedef enum {
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srslte_dmrs_pdsch_add_pos_2 = 0,
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srslte_dmrs_pdsch_add_pos_0,
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srslte_dmrs_pdsch_add_pos_1,
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srslte_dmrs_pdsch_add_pos_3
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} srslte_dmrs_pdsch_add_pos_t;
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typedef enum {
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srslte_dmrs_pdsch_mapping_type_A = 0,
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srslte_dmrs_pdsch_mapping_type_B
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} srslte_dmrs_pdsch_mapping_type_t;
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typedef struct {
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srslte_dmrs_pdsch_type_t type;
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srslte_dmrs_pdsch_typeA_pos_t typeA_pos;
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srslte_dmrs_pdsch_add_pos_t additional_pos;
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srslte_dmrs_pdsch_len_t length;
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srslte_dmrs_pdsch_mapping_type_t mapping_type;
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uint32_t duration;
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bool lte_CRS_to_match_around;
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bool additional_DMRS_DL_Alt;
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uint32_t n_id;
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uint32_t n_scid;
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uint32_t nof_prb;
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float beta;
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uint32_t reference_point;
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} srslte_dmrs_pdsch_cfg_t;
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typedef struct {
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srslte_dmrs_pdsch_cfg_t cfg;
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uint32_t symbols_idx[SRSLTE_DMRS_PDSCH_MAX_SYMBOLS];
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uint32_t nof_symbols;
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uint32_t sc_idx[SRSLTE_NRE];
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uint32_t nof_sc;
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} srslte_dmrs_pdsch_t;
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SRSLTE_API int srslte_dmrs_pdsch_cfg_to_str(const srslte_dmrs_pdsch_cfg_t* cfg, char* msg, uint32_t max_len);
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SRSLTE_API int srslte_dmrs_pdsch_init(srslte_dmrs_pdsch_t* q, const srslte_dmrs_pdsch_cfg_t* cfg);
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SRSLTE_API int srslte_dmrs_pdsch_put_sf(srslte_dmrs_pdsch_t* q, const srslte_dl_sf_cfg_t* sf, cf_t* sf_symbols);
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SRSLTE_API int srslte_dmrs_pdsch_get_sf(srslte_dmrs_pdsch_t* q,
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const srslte_dl_sf_cfg_t* sf,
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const cf_t* sf_symbols,
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cf_t* lest_square_estimates);
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#ifdef __cplusplus
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}
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#endif
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#endif // SRSLTE_DMRS_PDSCH_H
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