UWBIRStochasticPathlossModel Class Reference [IEEE 802.15.4A - Classes that implement the IEEE 802.15.4A UWB PHY., analogueModels - AnalogueModel implementations]

This AnalogueModel models implements the Ghassmezadeh stochastic UWB channel models. More...

#include <UWBIRStochasticPathlossModel.h>

Inherits AnalogueModel.

Collaboration diagram for UWBIRStochasticPathlossModel:

List of all members.

Public Member Functions
	UWBIRStochasticPathlossModel (double _PL0, double _mu_gamma, double _sigma_gamma, double _mu_sigma, double _sigma_sigma, const Move *_move, bool _enabled, bool _shadowing=true)
void	filterSignal (Signal &s)
	Has to be overriden by every implementation.
Public Attributes
double	PL0
double	mu_gamma
double	sigma_gamma
double	mu_sigma
double	sigma_sigma
double	gamma
double	S
double	sigma
double	n1
double	n2
double	n3
bool	isEnabled
bool	shadowing
cOutVector	distances
cOutVector	srcPosX
cOutVector	srcPosY
cOutVector	dstPosX
cOutVector	dstPosY
int	myIndex
std::string	myName
Static Public Attributes
static const double	Gtx = 1
static const double	Grx = 1
static const double	ntx = 1
static const double	nrx = 1
static const double	fc = 4492.8
static const double	d0 = 1
static double	n1_limit = 1.25
static double	n2_limit = 2
static const double	s_mu = 1.6
static const double	s_sigma = 0.5
static const double	kappa = 1
Protected Member Functions
double	getNarrowBandFreeSpacePathloss (double fc, double distance)
double	getGhassemzadehPathloss (double distance)
double	getFDPathloss (double freq, double distance)
double	simtruncnormal (double mean, double stddev, double a, int rng)
Protected Attributes
double	pathloss_exponent
double	fading
Dimension	frequency
const Move *	move
cOutVector	pathlosses

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Detailed Description

This AnalogueModel models implements the Ghassmezadeh stochastic UWB channel models.

Citation of the following publication is appreciated if you use the MiXiM UWB PHY model for a publication of your own. J. Rousselot, J.-D. Decotignie, An ultra-wideband impulse radio PHY layer model for network simulation. SIMULATION January 2011 vol. 87 no. 1-2 82-112.

For more information, see also:

[1] J. Rousselot, J.-D. Decotignie, An ultra-wideband impulse radio PHY layer model for network simulation. SIMULATION January 2011 vol. 87 no. 1-2 82-112. http://dx.doi.org/10.1177/0037549710377767 [2] J. Rousselot, Ultra Low Power Communication Protocols for UWB Impulse Radio Wireless Sensor Networks. EPFL Thesis 4720, 2010. http://infoscience.epfl.ch/record/147987 [3] A High-Precision Ultra Wideband Impulse Radio Physical Layer Model for Network Simulation, Jérôme Rousselot, Jean-Dominique Decotignie, Second International Omnet++ Workshop,Simu'TOOLS, Rome, 6 Mar 09. http://portal.acm.org/citation.cfm?id=1537714

Definition at line 53 of file UWBIRStochasticPathlossModel.h.

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Member Function Documentation

void UWBIRStochasticPathlossModel::filterSignal

(

Signal &

s

)

[virtual]

Has to be overriden by every implementation.

Filters a specified Signal by adding an attenuation over time to the Signal.

Implements AnalogueModel.

Definition at line 33 of file UWBIRStochasticPathlossModel.cc.

References Signal::addAttenuation(), Coord::distance(), Signal::getMove(), Move::getPositionAt(), Signal::getSignalStart(), and TimeMapping< Interpolator >::setValue().

                                                         {

  if (isEnabled) {
    // Initialize objects and variables
    TimeMapping<Linear>* attMapping = new TimeMapping<Linear> ();
    Argument arg;
    Move srcMove = s.getMove();
    Coord srcCoord, rcvCoord;
    double distance = 0;

    // Generate channel.
    // assume channel coherence during whole frame

    n1 = simtruncnormal(0, 1, n1_limit, 1);
    n2 = simtruncnormal(0, 1, n2_limit, 2);
    n3 = simtruncnormal(0, 1, n2_limit, 3);

    gamma = mu_gamma + n1 * sigma_gamma;
    sigma = mu_sigma + n3 * sigma_sigma;
    S = n2 * sigma;

    // Determine distance between sender and receiver
    srcCoord = srcMove.getPositionAt(s.getSignalStart());
    rcvCoord = move->getPositionAt(s.getSignalStart());

    distance = rcvCoord.distance(srcCoord);
    /*
     srcPosX.record(srcCoord.getX());
     srcPosY.record(srcCoord.getY());
     dstPosX.record(rcvCoord.getX());
     dstPosY.record(rcvCoord.getY());
     distances.record(distance);
     */
    // Compute pathloss
    double attenuation = getGhassemzadehPathloss(distance);
    pathlosses.record(attenuation);
    //attenuation = attenuation / (4*PI*pow(distance, gamma));
    // Store scalar mapping
    attMapping->setValue(arg, attenuation);
    s.addAttenuation(attMapping);
  }
}

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The documentation for this class was generated from the following files:

• modules/analogueModel/UWBIRStochasticPathlossModel.h
• modules/analogueModel/UWBIRStochasticPathlossModel.cc