examples/SISO_AMC_OFDM_node.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 SISO_LDPC_OFDM_node_HPP
#define SISO_LDPC_OFDM_node_HPP

#include <uhd/device.hpp>
#include <uhd/utils/thread_priority.hpp>
#include <uhd/utils/safe_main.hpp>
#include <uhd/usrp/multi_usrp.hpp>
#include <boost/program_options.hpp>
#include <boost/format.hpp>
#include <iostream>
#include <complex>
#include <uhd/types/clock_config.hpp>
#include <four_multi/gps.hpp>
#include <four_multi/four_multi.hpp>
#include <four_multi/modem_OFDM1.hpp>
#include <itpp/itbase.h>
#include <itpp/itcomm.h>
#include <itpp/stat/misc_stat.h>
#include <four_multi/simulator.hpp>
#include <four_multi/AMC.hpp>

using namespace boost;
using namespace itpp;


class SISO_AMC_OFDM_node : public four_multi_node {

   public:
   
  /* \brief Constructor. 
     \param  start_gain_rx This is the receiver gain. As the name indicates the received gain could be updated during the run, However, this was never implemented.
      \param start_gain_tx This is the transmitter gain.
      \param use_same_antenna. If XCVR2450 is used, setting this value 
           to true makes the J1 antenna connector be used during TX and RX. 
           Setting it to false makes J1 being used for RX and J2 for TX.
      \param modulation_order. Possible values are 4, 16 and 256. This is the constellation size of the QAM modulation used.
      \param simulate. This parameter is set true in 
  SISO_AMC_OFDM_simulator and false in SISO_AMC_OFDM_realtime.
      \param codec_ix: The codec number used by the AMC modulation and coding (LDPC). There are three possibilities 0 (rate 1/4), 1 (rate 1/2) and 2, (rate 3/4).
      \param chase Use chase combining (true or false).
      \param delta_t Time in seconds between frames.
  */  
    SISO_AMC_OFDM_node(float gain_rx, 
      float gain_tx,uint32_t node_ix , double frequency,
                       bool same_antenna,
                       uint32_t modulation_order, bool simulate, uint32_t codec_ix,bool chase, double delta_time);


   uint32_t frame_ix(void ){ return d_frame_ix;};

 
   ~SISO_AMC_OFDM_node();
  
   double get_gain(void) {return d_gain_rx;};
   OFDM1 ai; 

   vec BERraw, BER;
   cvec symbols, symbols_chase;
  
   uint64_t seed;

   protected:   

   uint32_t d_codec_ix;
   uint32_t d_modulation_order;


  //2E. K26

   virtual frame_settings node_init(void) ;
   virtual frame_settings node_process(void) ;
   virtual void end_of_run(void) ;

   void format_tx_symbols(uint32_t codec_ix, uint32_t modulation_order); 
   void decode_rx_symbols(uint32_t codec_ix, uint32_t modulation_order,
                          bool use_chase_combining);

   static const uint32_t buffer_size=10000;
   static const uint32_t block_length=400;
   static const uint32_t shift_transmit_signal_samples=2000;
   static const uint32_t max_modulation_order=256;

   double base_band_tx_power_ampl;
   uint32_t d_frame_ix, d_no_frames;
   double d_delta_time;
   double d_gain_rx, d_gain_tx, d_frequency;
   bool d_chase;
   cvec waveform_rx;
   cvec waveform_tx;
   bvec input, transmitted, transmitted_hat, message_hat, input_hat;
   double noise_variance_chase;
   double noise_variance, noise_variance_norm;
   vec soft_bit;
   int max_message_length, word_length;
   double scaling_tx_signal; 

   AMC amc;

   BERC berc;
   bvec decoded_bits;
   int ber_i;

   int modulation_order;
   int codec_ix;


};



#endif