JakesFading Class Reference [analogueModels - AnalogueModel implementations]

Implements Rayleigh fading after Jakes' model. More...

#include <JakesFading.h>

Inherits AnalogueModel.

Collaboration diagram for JakesFading:

List of all members.

Public Member Functions
	JakesFading (int fadingPaths, simtime_t delayRMS, Move *hostMove, double carrierFrequency, simtime_t interval)
	Takes the number of fading paths, the maximum delay on a path, the hosts move, the carrier frequency used and the interval in which to defien attenuation entries in. *.
virtual void	filterSignal (Signal &s)
	Has to be overriden by every implementation.
Protected Attributes
int	fadingPaths
	Number of fading paths used.
double *	angleOfArrival
	Angle of arrival on a fading path used for Doppler shift calculation.
simtime_t *	delay
	Delay on a fading path.
Move *	hostMove
	HostMove of this analogue models host.
double	carrierFrequency
	Carrier frequency to be used.
Argument	interval
	The interval to set attenuation entries in.
Friends
class	JakesFadingMapping

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Detailed Description

Implements Rayleigh fading after Jakes' model.

An example config.xml for this AnalogueModel can be the following:

	<AnalogueModel type="JakesFading">
		<!-- Carrier frequency of the signal in Hz
			 If ommited the carrier frequency from the
			 connection manager is taken if available
			 otherwise set to default frequency of 2.412e+9-->
		<parameter name="carrierFrequency" type="double" value="2.412e+9"/>

		<!-- Number of fading paths per host -->
		<parameter name="fadingPaths" type="long" value="3"/>

		<!-- f-selectivity: mean delay spread in seconds -->
		<parameter name="delayRMS" type="double" value="0.0001"/>

		<!-- Interval in which to define attenuation for in seconds -->
		<parameter name="interval" type="double" value="0.001"/>
	</AnalogueModel>
   

Author:

Hermann S. Lichte, Karl Wessel (port for MiXiM)

Definition at line 93 of file JakesFading.h.

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Member Function Documentation

void JakesFading::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 86 of file JakesFading.cc.

References Signal::addAttenuation(), Move::getDirection(), Signal::getMove(), Signal::getSignalLength(), Signal::getSignalStart(), Move::getSpeed(), hostMove, and interval.

{
  const Move& senderMove = s.getMove();
  double relSpeed = (senderMove.getDirection() * senderMove.getSpeed()
             - hostMove->getDirection() * hostMove->getSpeed()).length();

  simtime_t start = s.getSignalStart();
  simtime_t end = start + s.getSignalLength();

  s.addAttenuation(new JakesFadingMapping(this, relSpeed,
                      Argument(start),
                      interval,
                      Argument(end)));
}

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

• modules/analogueModel/JakesFading.h
• modules/analogueModel/JakesFading.cc