jist.swans.field
Class Fading.Rician

java.lang.Object
  jist.swans.field.Fading.Rician

All Implemented Interfaces:

Fading

Enclosing interface:

Fading

public static final class Fading.Rician
extends java.lang.Object
implements Fading

Computes Rician fading. Equivalent to GloMoSim code.

Since:

SWANS1.0

Author:

Rimon Barr <barr+jist@cs.cornell.edu>

Nested Class Summary

Nested classes/interfaces inherited from interface jist.swans.field.Fading

Fading.None, Fading.Rayleigh, Fading.Rician

Field Summary

private double	kFactor distribution parameters.
private double	stddev distribution parameters.

Constructor Summary

Fading.Rician(double kFactor)
Create new Rician fading model object.

Method Summary

private static double	Besseli0(double x) Compute zero-order Bessel function.
private static double	Besseli1(double x) Compute first-order Bessel function.
double	compute() Compute the fading loss.
private static double	computeStandardDeviation(double kFactor) Computes standard deviation for Rician distribution such that mean is 1.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

kFactor

private final double kFactor

distribution parameters.

stddev

private final double stddev

distribution parameters.

Constructor Detail

Fading.Rician

public Fading.Rician(double kFactor)

Create new Rician fading model object.

Parameters:

kFactor - k

Method Detail

Besseli0

private static double Besseli0(double x)

Compute zero-order Bessel function.

Parameters:

x - input

Returns:

output of Bessel

Besseli1

private static double Besseli1(double x)

Compute first-order Bessel function.

Parameters:

x - input

Returns:

output of Bessel

computeStandardDeviation

private static double computeStandardDeviation(double kFactor)

Computes standard deviation for Rician distribution such that mean is 1.

Parameters:

kFactor - k

Returns:

Rician standard deviation

compute

public double compute()

Compute the fading loss.

Specified by:

compute in interface Fading

Returns:

fading loss (units: dB)