/usr/include/ns3/jakes-propagation-loss-model.h is in libns3-dev 3.13+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2005,2006,2007 INRIA
*
* 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: Federico Maguolo <maguolof@dei.unipd.it>
*/
#ifndef PROPAGATION_JAKES_MODEL_H
#define PROPAGATION_JAKES_MODEL_H
#include "ns3/nstime.h"
#include "propagation-loss-model.h"
namespace ns3 {
/**
* \ingroup propagation
*
* \brief a Jakes propagation loss model
*
* The Jakes propagation loss model implemented here is
* described in [1].
*
*
* We call path the set of rays that depart from a given
* transmitter and arrive to a given receiver. For each ray
* The complex coefficient is compute as follow:
* \f[ u(t)=u_c(t) + j u_s(t)\f]
* \f[ u_c(t) = \frac{2}{\sqrt{N}}\sum_{n=0}^{M}a_n\cos(\omega_n t+\phi_n)\f]
* \f[ u_s(t) = \frac{2}{\sqrt{N}}\sum_{n=0}^{M}b_n\cos(\omega_n t+\phi_n)\f]
* where
* \f[ a_n=\left \{ \begin{array}{ll}
* \sqrt{2}\cos\beta_0 & n=0 \\
* 2\cos\beta_n & n=1,2,\ldots,M
* \end{array}
* \right .\f]
* \f[ b_n=\left \{ \begin{array}{ll}
* \sqrt{2}\sin\beta_0 & n=0 \\
* 2\sin\beta_n & n=1,2,\ldots,M
* \end{array}
* \right .\f]
* \f[ \beta_n=\left \{ \begin{array}{ll}
* \frac{\pi}{4} & n=0 \\
* \frac{\pi n}{M} & n=1,2,\ldots,M
* \end{array}
* \right .\f]
* \f[ \omega_n=\left \{ \begin{array}{ll}
* 2\pi f_d & n=0 \\
* 2\pi f_d \cos\frac{2\pi n}{N} & n=1,2,\ldots,M
* \end{array}
* \right .\f]
*
* The parameter \f$f_d\f$ is the doppler frequency and \f$N=4M+2\f$ where
* \f$M\f$ is the number of oscillators per ray.
*
* The attenuation coefficent of the path is the magnitude of the sum of
* all the ray coefficients. This attenuation coefficient could be greater than
* \f$1\f$, hence it is divide by \f$ \frac{2N_r}{\sqrt{N}} \sum_{n+0}^{M}\sqrt{a_n^2 +b_n^2}\f$
* where \f$N_r\f$ is the number of rays.
*
* The initail phases \f$\phi_i\f$ are random and they are choosen according
* to a given distribution.
*
* [1] Y. R. Zheng and C. Xiao, "Simulation Models With Correct
* Statistical Properties for Rayleigh Fading Channel", IEEE
* Trans. on Communications, Vol. 51, pp 920-928, June 2003
*/
class JakesPropagationLossModel : public PropagationLossModel
{
public:
static TypeId GetTypeId (void);
JakesPropagationLossModel ();
virtual ~JakesPropagationLossModel ();
/**
* \param nRays Number of rays per path
*
* Set the number of rays for each path
*/
void SetNRays (uint8_t nRays);
/**
* \param nOscillators Number of oscillators
*
* Set the number of oscillators to use to compute the ray coefficient
*/
void SetNOscillators (uint8_t nOscillators);
uint8_t GetNRays (void) const;
uint8_t GetNOscillators (void) const;
private:
JakesPropagationLossModel (const JakesPropagationLossModel &o);
JakesPropagationLossModel & operator = (const JakesPropagationLossModel &o);
void DoConstruct (void);
virtual double DoCalcRxPower (double txPowerDbm,
Ptr<MobilityModel> a,
Ptr<MobilityModel> b) const;
class PathCoefficients;
struct ComplexNumber {
double real;
double imag;
};
friend class PathCoefficents;
typedef std::vector<PathCoefficients *> DestinationList;
struct PathsSet {
Ptr<MobilityModel> sender;
DestinationList receivers;
};
typedef std::vector<PathsSet *> PathsList;
static const double PI;
ComplexNumber* m_amp;
RandomVariable m_variable;
double m_fd;
mutable PathsList m_paths;
uint8_t m_nRays;
uint8_t m_nOscillators;
};
} // namespace ns3
#endif /* PROPAGATION_JAKES_MODEL_H */
|