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182 lines
8.0 KiB
C
182 lines
8.0 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 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 polar_rm.h
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* \brief Declaration of the polar RateMatcher and RateDematcher.
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* \author Jesus Gomez
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* \date 2020
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*
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* \copyright Software Radio Systems Limited
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*
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*/
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#ifndef SRSLTE_POLARRM_H
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#define SRSLTE_POLARRM_H
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/*!
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* \brief Describes a polar rate matcher or rate dematcher
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*/
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typedef struct SRSLTE_API {
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void* ptr; /*!< \brief Rate Matcher auxiliary registers. */
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} srslte_polar_rm_t;
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/*!
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* Initializes the Rate Matcher for the maximum rate-matched codeword length
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* \param[out] q A pointer to a srslte_polar_rm_t structure.
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSLTE_API int srslte_polar_rm_tx_init(srslte_polar_rm_t* q);
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/*!
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* Carries out the actual rate-matching.
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* \param[in] q A pointer to the Rate-Matcher (a srslte_polar_rm_t structure
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* instance) that carries out the rate matching.
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* \param[in] input The codeword obtained from the polar encoder.
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* \param[out] output The rate-matched codeword resulting from the rate-matching
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* operation.
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* \param[in] n \f$log_2\f$ of the codeword length.
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* \param[in] E Rate-matched codeword length.
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* \param[in] K Message size (including CRC).
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* \param[in] ibil Indicator of bit interliaver (set to 0 to disable).
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSLTE_API int srslte_polar_rm_tx(srslte_polar_rm_t* q,
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const uint8_t* input,
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uint8_t* output,
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const uint8_t n,
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const uint32_t E,
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const uint32_t K,
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const uint8_t ibil);
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/*!
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* Initializes all the Rate DeMatcher variables.
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* \param[out] q A pointer to a srslte_polar_rm_t structure.
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSLTE_API int srslte_polar_rm_rx_init_f(srslte_polar_rm_t* q);
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/*!
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* Carries out the actual rate-dematching.
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* \param[in] q A pointer to the Rate-DeMatcher (a srslte_polar_rm_t structure
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* instance) that carries out the rate matching.
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* \param[in] input The LLRs obtained from the channel samples that correspond to
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* the codeword to be first, rate-dematched and then decoded.
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* \param[out] output The rate-dematched codeword resulting from the rate-dematching
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* operation.
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* \param[in] E Rate-matched codeword length.
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* \param[in] n \f$log_2\f$ of the codeword length.
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* \param[in] K Message size (including CRC).
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* \param[in] ibil Indicator of bit interliaver (set to 0 to disable).
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSLTE_API int srslte_polar_rm_rx_f(srslte_polar_rm_t* q,
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const float* input,
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float* output,
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const uint32_t E,
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const uint8_t n,
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const uint32_t K,
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const uint8_t ibil);
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/*!
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* Initializes all the Rate DeMatcher variables (int16_t inputs).
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* \param[out] q A pointer to a srslte_polar_rm_t structure.
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSLTE_API int srslte_polar_rm_rx_init_s(srslte_polar_rm_t* q);
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/*!
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* Carries out the actual rate-dematching (in16_t inputs)
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* \param[in] q A pointer to the Rate-DeMatcher (a srslte_polar_rm_t structure
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* instance) that carries out the rate matching.
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* \param[in] input The LLRs obtained from the channel samples that correspond to
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* the codeword to be first, rate-dematched and then decoded.
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* \param[out] output The rate-dematched codeword resulting from the rate-dematching
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* operation.
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* \param[in] E Rate-matched codeword length.
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* \param[in] n \f$log_2\f$ of the codeword length.
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* \param[in] K Message size (including CRC).
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* \param[in] ibil Indicator of bit interliaver (set to 0 to disable).
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSLTE_API int srslte_polar_rm_rx_s(srslte_polar_rm_t* q,
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const int16_t* input,
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int16_t* output,
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const uint32_t E,
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const uint8_t n,
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const uint32_t K,
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const uint8_t ibil);
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/*!
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* Initializes all the Rate DeMatcher variables (int8_t inputs).
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* \param[out] q A pointer to a srslte_polar_rm_t structure.
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSLTE_API int srslte_polar_rm_rx_init_c(srslte_polar_rm_t* q);
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/*!
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* Carries out the actual rate-dematching (int8_t inputs).
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* \param[in] q A pointer to the Rate-DeMatcher (a srslte_polar_rm_t structure
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* instance) that carries out the rate matching.
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* \param[in] input The LLRs obtained from the channel samples that correspond to
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* the codeword to be first, rate-dematched and then decoded.
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* \param[out] output The rate-dematched codeword resulting from the rate-dematching
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* operation.
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* \param[in] E Rate-matched codeword length.
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* \param[in] n \f$log_2\f$ of the codeword length.
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* \param[in] K Message size (including CRC).
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* \param[in] ibil Indicator of bit interliaver (set to 0 to disable).
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* \return An integer: 0 if the function executes correctly, -1 otherwise.
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*/
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SRSLTE_API int srslte_polar_rm_rx_c(srslte_polar_rm_t* q,
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const int8_t* input,
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int8_t* output,
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const uint32_t E,
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const uint8_t n,
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const uint32_t K,
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const uint8_t ibil);
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/*!
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* The Rate Matcher "destructor": it frees all the resources allocated to the rate-matcher.
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* \param[in] q A pointer to the dismantled rate-matcher.
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*/
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SRSLTE_API void srslte_polar_rm_tx_free(srslte_polar_rm_t* q);
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/*!
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* The Rate Matcher "destructor": it frees all the resources allocated to the rate-dematcher.
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* \param[in] q A pointer to the dismantled rate-dematcher.
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*/
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SRSLTE_API void srslte_polar_rm_rx_free_f(srslte_polar_rm_t* q);
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/*!
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* The Rate Matcher "destructor" for short symbols: it frees all the resources allocated to the rate-dematcher.
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* \param[in] q A pointer to the dismantled rate-dematcher.
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*/
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SRSLTE_API void srslte_polar_rm_rx_free_s(srslte_polar_rm_t* q);
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/*!
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* The Rate Matcher "destructor" for int8_t symbols: it frees all the resources allocated to the rate-dematcher.
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* \param[in] q A pointer to the dismantled rate-dematcher.
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*/
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SRSLTE_API void srslte_polar_rm_rx_free_c(srslte_polar_rm_t* q);
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#endif // SRSLTE_POLARRM_H
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