turbo.h

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// 
// SPUC - Signal processing using C++ - A DSP library
/*---------------------------------------------------------------------------*
 *                                   IT++                                    *
 *---------------------------------------------------------------------------*
 * Copyright (c) 1995-2001 by Tony Ottosson, Thomas Eriksson, Pål Frenger,   *
 * Tobias Ringström, and Jonas Samuelsson.                                   *
 *                                                                           *
 * Permission to use, copy, modify, and distribute this software and its     *
 * documentation under the terms of the GNU General Public License is hereby *
 * granted. No representations are made about the suitability of this        *
 * software for any purpose. It is provided "as is" without expressed or     *
 * implied warranty. See the GNU General Public License for more details.    *
 *---------------------------------------------------------------------------*/

#ifndef __turbo_h
#define __turbo_h

#include <binary.h>
#include <vector.h>
#include <matrix.h>
#include "rec_syst_conv_code.h"
#include "interleave.h"
namespace SPUC {
#ifndef DOXYGEN_SHOULD_SKIP_THIS

class Turbo_Codec {
 public:
  
  Turbo_Codec(void) {}
  
  void set_parameters(ivec gen1, ivec gen2, int constraint_length, const ivec &interleaver_sequence, 
                      int in_iterations=8, string in_metric="LOGMAX");

  void set_interleaver(const ivec &interleaver_sequence);
  
  void set_awgn_channel_parameters(double in_Ec, double in_N0);
  
  void set_scaling_factor(double in_Lc);

  void encode(const bvec &input, bvec &output);

  void decode(const vec &received_signal, bvec &decoded_bits, const bvec &true_bits="0");

  void encode_block(const bvec &input, bvec &in1, bvec &in2, bmat &parity1, bmat &parity2);

  void decode_block(const vec &rec_syst1, const vec &rec_syst2, const mat &rec_parity1, const mat &rec_parity2, 
                    bmat &decoded_bits_i, const bvec &true_bits="0");

private:   

  void decode_n2(const vec &received_signal, bvec &decoded_bits);

  //Scalars:
  long interleaver_size;
  long Ncoded, Nuncoded;
  int m_tail, n1, n2, n_tot, iterations;
  double Ec, N0, Lc, R;
  string metric;

  //Classes:
  Rec_Syst_Conv_Code rscc1, rscc2;
  Sequence_Interleaver<bin> bit_interleaver;
  Sequence_Interleaver<double> float_interleaver;

};


ivec wcdma_turbo_interleaver_sequence(int interleaver_size);
#endif
}
#endif // __turbo_h

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