Package ipsk.math.random

Class GaussianDistributionRandomGenerator

java.lang.Object

ipsk.math.random.GaussianDistributionRandomGenerator

All Implemented Interfaces:

FloatStream

public class GaussianDistributionRandomGenerator
extends java.lang.Object
implements FloatStream

Generator for Gaussion (normal) distributed random values. References: http://www.dspguru.com/dsp/howtos/how-to-generate-white-gaussian-noise [Jer92] Simulation of Communication Systems by M. C. Jeruchim, P. Balaban and K. S. Shanmugan [Ros88] A First Course on Probability by S. M. Ross

Author:

klausj

Field Summary

Fields

Modifier and Type	Field	Description
static double	DEFAULT_MEAN
static double	DEFAULT_VARIANCE

Constructor Summary

Constructors

Constructor	Description
GaussianDistributionRandomGenerator()
GaussianDistributionRandomGenerator(double mean, double variance)
GaussianDistributionRandomGenerator(double mean, double variance, long length)
GaussianDistributionRandomGenerator(long frameLength)

Method Summary

Modifier and Type	Method	Description
void	close()
void	fillWithGaussionDistributedValues(double[] buf, int off, int len)	Generates gaussian distributed random value.
Complex	generateGaussionDistributedValues()	Generates gaussion distributed random value.
static void	main(java.lang.String[] args)	Test method.
int	read(double[] buf, int offset, int len)
long	skip(long skip)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_MEAN

public static final double DEFAULT_MEAN

See Also:

Constant Field Values

DEFAULT_VARIANCE

public static final double DEFAULT_VARIANCE

See Also:

Constant Field Values

Constructor Detail

GaussianDistributionRandomGenerator

public GaussianDistributionRandomGenerator()

GaussianDistributionRandomGenerator

public GaussianDistributionRandomGenerator(double mean,
                                           double variance)

GaussianDistributionRandomGenerator

public GaussianDistributionRandomGenerator(double mean,
                                           double variance,
                                           long length)

GaussianDistributionRandomGenerator

public GaussianDistributionRandomGenerator(long frameLength)

Parameters:

frameLength - length in frames

Method Detail

generateGaussionDistributedValues

public Complex generateGaussionDistributedValues()

Generates gaussion distributed random value. Based on Math.random() method.

Returns:

gaussion distributed random value

fillWithGaussionDistributedValues

public void fillWithGaussionDistributedValues(double[] buf,
                                              int off,
                                              int len)

Generates gaussian distributed random value. Based on Math.random() method.

read

public int read(double[] buf,
                int offset,
                int len)

Specified by:

read in interface FloatStream

skip

public long skip(long skip)

Specified by:

skip in interface FloatStream

close

public void close()

Specified by:

close in interface FloatStream

main

public static void main(java.lang.String[] args)

Test method.

Parameters:

args -