shadowing.h

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */

/*
 * shadowing.h
 * Copyright (C) 2000 by the University of Southern California
 * $Id: shadowing.h,v 1.4 2005/08/25 18:58:09 johnh Exp $
 *
 * 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.
 *
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
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 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 *
 *
 * The copyright of this module includes the following
 * linking-with-specific-other-licenses addition:
 *
 * In addition, as a special exception, the copyright holders of
 * this module give you permission to combine (via static or
 * dynamic linking) this module with free software programs or
 * libraries that are released under the GNU LGPL and with code
 * included in the standard release of ns-2 under the Apache 2.0
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/*
 * Shadowing propation model, including the path-loss model.
 * This statistcal model is applicable for both outdoor and indoor.
 * Wei Ye, weiye@isi.edu, 2000
 */


#ifndef shadowing_h
#define shadowing_h

#include <packet-stamp.h>
#include <wireless-phy.h>
#include <propagation.h>
#include <rng.h>
#include <float.h>

class Shadowing : public Propagation {
public:
    Shadowing();
    ~Shadowing();
    virtual double Pr(PacketStamp *tx, PacketStamp *rx, WirelessPhy *ifp);
    virtual double getDist(double Pr, double Pt, double Gt, double Gr,
                   double hr, double ht, double L, double lambda) {
        return DBL_MAX;
    }
    virtual int command(int argc, const char*const* argv);

protected:
    RNG *ranVar;    // random number generator for normal distribution
    
    double pathlossExp_;    // path-loss exponent
    double std_db_;     // shadowing deviation (dB),
    double dist0_;  // close-in reference distance
    int seed_;  // seed for random number generator
};

#endif

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