fadingmimochannel.h

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/*-*-c++-*-*****************************************************************
                          fadingmimochannel.h  -  MIMO channel classes
                             -------------------
    begin                : Feb 2003
    copyright            : (C) 2003 by Christian Stimming
    email                : stimming@tuhh.de
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Lesser General Public            *
 *   License as published by the Free Software Foundation; either          *
 *   version 2.1 of the License, or (at your option) any later version.    *
 *                                                                         *
 *   This library 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     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the Free Software   *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef FADINGMIMOCHANNEL_H
#define FADINGMIMOCHANNEL_H

#include <simthetic/phbib.h>
#include <simthetic/phrand.h>
#include <simthetic/signals.h>
#include <simthetic/basicdevice.h>

#include "mimo-channel.h"

// MIMO channels are only available if the matrix data types are
// available

namespace simthlib {
    class OfdmReceiver;
    class OfdmTransmitter;
}

namespace mimo {

//--------------------------------------------------------------------

class FadingMIMOChannel : public MIMOChannel
{
   protected:

      double sigma;

      RayleighRng ray;

      double normFactor;

      // Needed for broadband Rayleigh fading channel
      simthlib::OfdmReceiver *ofdm_recv;
      simthlib::OfdmTransmitter *ofdm_trans;
      
      // Needed for broadband Rayleigh fading channel
      unsigned num_carrier;
      double carrier_dist;
      unsigned maxantenna;

      // Needed for broadband Rayleigh fading channel
      std::vector<TimeSignal::storage_type*> time_samples;
      std::vector<ModSeq*> freq_samples;
      CVectorSeq::storage_type freq_vectors_in;
      CVectorSeq::storage_type freq_vectors_out;

   public:
      FadingMIMOChannel(int deviceID, 
            DeviceSystemIntf* system,
            const simth::PropertyList& pl);

      virtual ~FadingMIMOChannel();

      virtual void refresh();


      void getTransfer(int relative_time, MatrixFreqSignal& trans) const;

      void transmit(const VectorTimeSignal &sym, VectorTimeSignal& outsym);

      virtual void print(std::ostream &os) const;

};

class CmplFadingMIMOChannel : public FadingMIMOChannel
{
   private:
      GaussRng real;
      GaussRng imag;

   public:
      CmplFadingMIMOChannel(int deviceID,
                DeviceSystemIntf* system,
                const simth::PropertyList& pl);

      virtual ~CmplFadingMIMOChannel();

      void refresh();
      virtual void print(std::ostream &os) const;
};

class FileFadingChannel : public FadingMIMOChannel
{
   private:
      std::string filename;

   public:
      FileFadingChannel(int deviceID,
            DeviceSystemIntf* system,
            const simth::PropertyList& pl);

      virtual ~FileFadingChannel();

      void refresh();
};


} //namespace

#endif // FADINGMIMOCHANNEL

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