mirror of https://github.com/PentHertz/srsLTE.git
100 lines
3.3 KiB
C
100 lines
3.3 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of the srsLTE library.
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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: turbodecoder.h
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*
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* Description: Turbo Decoder.
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* Parallel Concatenated Convolutional Code (PCCC) with two 8-state constituent
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* encoders and one turbo code internal interleaver. The coding rate of turbo
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* encoder is 1/3.
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* MAP_GEN is the MAX-LOG-MAP generic implementation of the decoder.
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*
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* Reference: 3GPP TS 36.212 version 10.0.0 Release 10 Sec. 5.1.3.2
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*********************************************************************************************/
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#ifndef TURBODECODER_GEN_
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#define TURBODECODER_GEN_
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#include "srslte/config.h"
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#include "srslte/phy/fec/tc_interl.h"
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#include "srslte/phy/fec/cbsegm.h"
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#define SRSLTE_TCOD_RATE 3
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#define SRSLTE_TCOD_TOTALTAIL 12
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#define SRSLTE_TCOD_MAX_LEN_CB 6144
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#define SRSLTE_TCOD_MAX_LEN_CODED (SRSLTE_TCOD_RATE*SRSLTE_TCOD_MAX_LEN_CB+SRSLTE_TCOD_TOTALTAIL)
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typedef struct SRSLTE_API {
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int max_long_cb;
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float *beta;
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} srslte_map_gen_vl_t;
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typedef struct SRSLTE_API {
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int max_long_cb;
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srslte_map_gen_vl_t dec;
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float *llr1;
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float *llr2;
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float *w;
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float *syst;
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float *parity;
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int current_cbidx;
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uint32_t current_cb_len;
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uint32_t n_iter;
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srslte_tc_interl_t interleaver[SRSLTE_NOF_TC_CB_SIZES];
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} srslte_tdec_gen_t;
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SRSLTE_API int srslte_tdec_gen_init(srslte_tdec_gen_t * h,
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uint32_t max_long_cb);
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SRSLTE_API void srslte_tdec_gen_free(srslte_tdec_gen_t * h);
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SRSLTE_API int srslte_tdec_gen_reset(srslte_tdec_gen_t * h, uint32_t long_cb);
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SRSLTE_API void srslte_tdec_gen_iteration(srslte_tdec_gen_t * h,
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float * input,
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uint32_t long_cb);
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SRSLTE_API void srslte_tdec_gen_decision(srslte_tdec_gen_t * h,
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uint8_t *output,
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uint32_t long_cb);
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SRSLTE_API void srslte_tdec_gen_decision_byte(srslte_tdec_gen_t * h,
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uint8_t *output,
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uint32_t long_cb);
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SRSLTE_API int srslte_tdec_gen_run_all(srslte_tdec_gen_t * h,
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float * input,
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uint8_t *output,
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uint32_t nof_iterations,
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uint32_t long_cb);
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#endif
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