FFT

java.lang.Object

de.das.encrypter.fourier.FFT

public class FFT extends Object

This class provides a method for performing the fast Fourier transform (FFT) and its inverse function.

Constructor Summary

Constructors

Constructor

Description

FFT()
Method Summary

Modifier and Type

Method

Description

static Complex[]

fft(double[] src)

Performs a FFT.

static double[]

ifft(Complex[] src)

Performs an invers FFT.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- FFT
  
  public FFT()
Method Details
- fft
  
  public static Complex[] fft(double[] src) throws Exception
  
  Performs a FFT.
  
  Parameters:
  
  src - the time course or similar input values.
  
  Returns:
  
  the resulting spectrum values.
  
  Throws:
  
  Exception - in case of any error.
- ifft
  
  public static double[] ifft(Complex[] src) throws Exception
  
  Performs an invers FFT.
  
  Parameters:
  
  src - the complex spectrum values.
  
  Returns:
  
  the time course according to the given spectrum.
  
  Throws:
  
  Exception - in case of any error.