jakes-process.h

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2012 Telum (www.telum.ru)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Kirill Andreev <andreev@telum.ru>, Alexander Sofronov <sofronov@telum.ru>
 */
#ifndef DOPPLER_PROCESS_H
#define DOPPLER_PROCESS_H

#include "ns3/object.h"
#include "ns3/nstime.h"
#include "ns3/random-variable-stream.h"
#include <complex>

namespace ns3
{
class PropagationLossModel;
class JakesPropagationLossModel;
class JakesProcess : public Object
{
public:
  static TypeId GetTypeId (void);
  JakesProcess ();
  virtual ~JakesProcess();
  virtual void DoDispose ();
  std::complex<double> GetComplexGain () const;
  double GetChannelGainDb () const;
  void SetPropagationLossModel (Ptr<const PropagationLossModel>);
private:
  struct Oscillator
  {
    Oscillator (std::complex<double> amplitude, double initialPhase, double omega);
    // Get the complex amplitude at moment \param t
    std::complex<double> GetValueAt (Time t) const;
    std::complex<double> m_amplitude;
    double m_phase;
    double m_omega;
  };
private:
  void SetNOscillators (unsigned int nOscillators);
  void SetDopplerFrequencyHz (double dopplerFrequencyHz);
  void ConstructOscillators ();
private:
  std::vector<Oscillator> m_oscillators;
  double m_omegaDopplerMax;
  unsigned int m_nOscillators;
  Ptr<UniformRandomVariable> m_uniformVariable;
  Ptr<const JakesPropagationLossModel> m_jakes;
};
} // namespace ns3
#endif // DOPPLER_PROCESS_H