srsLTE/lib/include/srslte/phy/fec/convcoder.h

/**
 *
 * \section COPYRIGHT
 *
 * Copyright 2013-2015 Software Radio Systems Limited
 *
 * \section LICENSE
 *
 * This file is part of the srsLTE library.
 *
 * srsLTE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * srsLTE is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * A copy of the GNU Affero General Public License can be found in
 * the LICENSE file in the top-level directory of this distribution
 * and at http://www.gnu.org/licenses/.
 *
 */

/**********************************************************************************************
 *  File:         convcoder.h
 *
 *  Description:  Convolutional encoder.
 *                LTE uses a tail biting convolutional code with constraint length 7
 *                and coding rate 1/3.
 *
 *  Reference:    3GPP TS 36.212 version 10.0.0 Release 10 Sec. 5.1.3.1
 *********************************************************************************************/

#ifndef CONVCODER_
#define CONVCODER_

#include <stdbool.h>
#include "srslte/config.h"

typedef struct SRSLTE_API {
  uint32_t R;
  uint32_t K;
  int poly[3];
  bool tail_biting;
}srslte_convcoder_t;

SRSLTE_API int srslte_convcoder_encode(srslte_convcoder_t *q, 
                                       uint8_t *input, 
                                       uint8_t *output, 
                                       uint32_t frame_length);


#endif