/usr/include/ns3.27/ns3/friis-spectrum-propagation-loss.h is in libns3-dev 3.27+dfsg-1.
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/*
* Copyright (c) 2009 CTTC
*
* 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: Nicola Baldo <nbaldo@cttc.es>
*/
#ifndef FRIIS_SPECTRUM_PROPAGATION_LOSS_H
#define FRIIS_SPECTRUM_PROPAGATION_LOSS_H
#include <ns3/spectrum-propagation-loss-model.h>
namespace ns3 {
class MobilityModel;
/**
* \ingroup spectrum
* \brief Friis spectrum propagation loss model
*
* The propagation loss is calculated according to a simplified version of Friis'
* formula in which antenna gains are unitary:
*
* \f$ L = \frac{4 \pi * d * f}{C^2}\f$
*
* where C = 3e8 m/s is the light speed in the vacuum. The intended
* use is to calculate Prx = Ptx * G
*/
class FriisSpectrumPropagationLossModel : public SpectrumPropagationLossModel
{
public:
FriisSpectrumPropagationLossModel ();
~FriisSpectrumPropagationLossModel ();
/**
* \brief Get the type ID.
* \return the object TypeId
*/
static TypeId GetTypeId ();
virtual Ptr<SpectrumValue> DoCalcRxPowerSpectralDensity (Ptr<const SpectrumValue> txPsd,
Ptr<const MobilityModel> a,
Ptr<const MobilityModel> b) const;
/**
* Return the propagation loss L according to a simplified version of Friis'
* formula in which antenna gains are unitary
*
* @param f frequency in Hz
* @param d distance in m
*
* @return if Prx < Ptx then return Prx; else return Ptx
*/
double CalculateLoss (double f, double d) const;
};
} // namespace ns3
#endif /* FRIIS_SPECTRUM_PROPAGATION_LOSS_MODEL_H */
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