math.fourierTransforms
Class DFT

java.lang.Object
  math.fourierTransforms.DFT

public class DFT
extends java.lang.Object

Copyright 2005, DocJava, Inc. User: dlyon Date: Oct 31, 2005 Time: 1:26:24 PM Totally self-contained DFT example. This is an O(N**2) algorithm that works for any value of N.

Constructor Summary

DFT(int N)

Method Summary

double[]	dft(double[] inputData) Do a FFTR2Double via direct methods.
double[]	getPowerSpectralDensity()
double[]	idft()
static void	main(java.lang.String[] args)
static void	testDFT() Test the DFT using a small number of samples.

Methods inherited from class java.lang.Object

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

Constructor Detail

DFT

public DFT(int N)

Method Detail

dft

public double[] dft(double[] inputData)

Do a FFTR2Double via direct methods. This is an O(N**2) time algorithm.

Parameters:

inputData - input real numbers.

Returns:

PSD

getPowerSpectralDensity

public double[] getPowerSpectralDensity()

idft

public double[] idft()

testDFT

public static void testDFT()

Test the DFT using a small number of samples. This is an O(N**2) algorithm.

main

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