modem/AMC.hpp

// Copyright 2011-2013, Per Zetterberg, KTH Royal Institute of Technology
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//



#ifndef AMC_HPP
#define AMC_HPP

#include "LDPC1.hpp"
#include <vector>

class AMC {
public:

  AMC(void);

  void init(uint32_t code_word_size,bool load_from_file);
  
  void modulate(uint32_t modulation_order, uint32_t codec_ix,  bvec message, bvec &transmitted, cvec &symbols,int skip_symbols) ;
  
   void encode(uint32_t codec_ix, bvec message, bvec &transmitted);

  int codec_message_size(uint32_t codec_ix) ;

  int no_of_codecs(void)  {return 4;};

  double evm(uint32_t modulation_order, bvec &transmitted, 
              cvec &symbols, int skip_symbols);


  void demodulate(const cvec &input_symbols, double noise_variance,
     uint32_t modulation_order, 
            uint32_t codec_ix, bvec &message_hat, bvec &transmitted_hat) ;


  double noise_variance(const cvec &symbols, uint32_t modulation_order);

  bool only_raw_bits;  

  void randb_thread_safe(int size, bvec &out, uint64_t *seed) ;

  void randb_thread_safe(int start_ix, int length, bvec &out, uint64_t *seed) ;

   void run_through_all_mcs(void) ;


  private:

  /* \brief Not part of the API */
  uint32_t rand_new(uint64_t *next) ;

   LDPC1 *codec(int number)  {
    if (number==0) {
      return &b0;
    };
    if (number==1) {
      return &b1;
    };
    if (number==2) {
      return &b2;
    };
    if (number==3) {
      return &b3;
    };
    return &b0;
  };

  LDPC1 b0, b1, b2, b3;
 QAM qam; 
 vec soft_bit;
  int m_code_word_size;
};

#endif