delayprofile.h

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/* -*-c++-*-***************************************************************
                          delayprofile.h  -  description
                             -------------------
    begin                : November 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 DELAYPROFILE_H
#define DELAYPROFILE_H

#include <iostream>
#include <complex>

#include <phbib.h>
#include <phrand.h>

namespace simthlib
{

using simth::Complex;



class DelayProfile
{

  public:
    DelayProfile() {};
    virtual ~DelayProfile() {};

    virtual double get() const = 0;

    /* Returns the maximal delay.
    */
    virtual double maxDelay() const = 0;

    virtual void print(std::ostream &os) const = 0;
};



class ExponentialDelayProfile : public DelayProfile
{

  public:
    ExponentialDelayProfile(double att, double maxT);

    virtual ~ExponentialDelayProfile();

    double get() const;


    double attenuationFactor() const {return expRng.attenuationFactor();}

    /* Maximal delay \f$\tau_{max}\f$.
    */
    double maxDelay() const {return expRng.maxLimit();}

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

  private:

    simth::ExponentialMaxLimitRng expRng;
};





class BuDelayProfile : public DelayProfile
{

  protected:

    simth::ExponentialMaxLimitRng exp1;

    simth::UniformRng uni;


  public:
    BuDelayProfile( );

    virtual ~BuDelayProfile();

    double get() const;

    /* Maximal delay, is fixed to 10e-6 seconds for bad urban delay profile.
    */
    double maxDelay() const {return getMaxDelay();}

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

    static double getMaxDelay(){return 10e-6;};

};




class HtDelayProfile : public DelayProfile
{
  protected:

    simth::ExponentialMaxLimitRng exp1, exp2;

    simth::UniformRng uni;

  public:

    HtDelayProfile( );

    // destructor
    virtual ~HtDelayProfile();

    double get() const;

    /* Maximal delay, is fixed to 20e-6 seconds for hilly terrain
       delay profile.
    */
    double maxDelay() const {return getMaxDelay();}

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

    static double getMaxDelay(){return 20e-6;}

};


class UniformDelayProfile : public DelayProfile
{

    simth::UniformRng uni;
    double scaling;

  public:
    UniformDelayProfile(double tau_max);

    virtual ~UniformDelayProfile();

    double get() const;

    /* Maximal delay \f$\tau_{max}\f$.
    */
    double maxDelay() const {return 1.0/scaling;}

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

};



} // namespace

#endif // DELAYPROFILE_H

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