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109 lines
4.0 KiB
C
109 lines
4.0 KiB
C
/**
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN 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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* srsRAN 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 SRSRAN_PBCH_NR_H
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#define SRSRAN_PBCH_NR_H
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#include "srsran/phy/common/phy_common_nr.h"
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#include "srsran/phy/fec/crc.h"
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#include "srsran/phy/fec/polar/polar_code.h"
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#include "srsran/phy/fec/polar/polar_decoder.h"
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#include "srsran/phy/fec/polar/polar_encoder.h"
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#include "srsran/phy/fec/polar/polar_rm.h"
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#include "srsran/phy/modem/modem_table.h"
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#include "srsran/phy/phch/pbch_msg_nr.h"
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/**
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* @brief Describes the NR PBCH object initialisation arguments
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*/
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typedef struct SRSRAN_API {
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bool enable_encode; ///< Enable encoder
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bool enable_decode; ///< Enable decoder
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bool disable_simd; ///< Disable SIMD polar encoder/decoder
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} srsran_pbch_nr_args_t;
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/**
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* @brief Describes the NR PBCH configuration
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*/
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typedef struct SRSRAN_API {
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uint32_t N_id; ///< Physical cell identifier
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uint32_t n_hf; ///< Number of half radio frame, 0 or 1
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uint32_t ssb_idx; ///< SSB candidate index, up to 4 LSB significant
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uint32_t Lmax; ///< Number of SSB opportunities, described in TS 38.213 4.1 ...
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float beta; ///< Scaling factor for PBCH symbols, set to zero for default
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} srsran_pbch_nr_cfg_t;
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/**
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* @brief Describes the NR PBCH object initialisation arguments
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*/
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typedef struct SRSRAN_API {
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srsran_polar_code_t code;
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srsran_polar_encoder_t polar_encoder;
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srsran_polar_decoder_t polar_decoder;
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srsran_polar_rm_t polar_rm_tx;
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srsran_polar_rm_t polar_rm_rx;
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srsran_crc_t crc;
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srsran_modem_table_t qpsk;
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} srsran_pbch_nr_t;
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/**
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* @brief Initialises an NR PBCH object with the provided arguments
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* @param q NR PBCH object
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* @param args Arguments providing the desired configuration
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* @return SRSRAN_SUCCESS if initialization is successful, SRSRAN_ERROR code otherwise
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*/
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SRSRAN_API int srsran_pbch_nr_init(srsran_pbch_nr_t* q, const srsran_pbch_nr_args_t* args);
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/**
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* @brief Deallocates an NR PBCH object
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* @param q NR PBCH object
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*/
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SRSRAN_API void srsran_pbch_nr_free(srsran_pbch_nr_t* q);
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/**
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* @brief Encodes an NR PBCH message into a SSB resource grid
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* @param q NR PBCH object
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* @param cfg NR PBCH configuration
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* @param msg NR PBCH message to transmit
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* @param[out] ssb_grid SSB resource grid
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* @return SRSRAN_SUCCESS if encoding is successful, SRSRAN_ERROR code otherwise
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*/
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SRSRAN_API int srsran_pbch_nr_encode(srsran_pbch_nr_t* q,
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const srsran_pbch_nr_cfg_t* cfg,
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const srsran_pbch_msg_nr_t* msg,
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cf_t ssb_grid[SRSRAN_SSB_NOF_RE]);
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/**
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* @brief Decodes an NR PBCH message in the SSB resource grid
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* @param q NR PBCH object
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* @param cfg NR PBCH configuration
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* @param[in] ce Channel estimates for the SSB resource grid
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* @param msg NR PBCH message received
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* @return SRSRAN_SUCCESS if decoding is successful, SRSRAN_ERROR code otherwise
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*/
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SRSRAN_API int srsran_pbch_nr_decode(srsran_pbch_nr_t* q,
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const srsran_pbch_nr_cfg_t* cfg,
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const cf_t ssb_grid[SRSRAN_SSB_NOF_RE],
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const cf_t ce[SRSRAN_SSB_NOF_RE],
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srsran_pbch_msg_nr_t* msg);
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#endif // SRSRAN_PBCH_NR_H
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