zeus::TButterflyFFT Class Reference

#include <ButterflyFFT.h>

Public Member Functions
	TButterflyFFT ()
virtual	~TButterflyFFT ()
void	fft (TComplex *axIn, Int iN)
void	ifft (TComplex *axIn, Int iN)
void	fft2D (TComplex **axIn, Int iWidth, Int iHeight)
void	ifft2D (TComplex **axIn, Int iWidth, Int iHeight)

Detailed Description

this class implements the fast fourier transformation and inverse fast fourier transformation functions.

Constructor & Destructor Documentation

TButterflyFFT()

TButterflyFFT::TButterflyFFT

(

)

Creates the fourier transformater

~TButterflyFFT()

TButterflyFFT::~TButterflyFFT ( )

virtual

Destroys the fourier transformater

Member Function Documentation

fft()

void TButterflyFFT::fft	(	TComplex *	axIn,
		Int	iN
	)

Complex fast fourier transformation. This method takes numbers of the complex numberspace, transforms them, and returns the result again in the complex number space. To feed it with real numbers, just set the real components of the complex numbers only.

Parameters

axIn	: Array of complex numbers as input. The output will be written into the same array
iN	: Number of samples

fft2D()

void TButterflyFFT::fft2D	(	TComplex **	axIn,
		Int	iWidth,
		Int	iHeight
	)

This method implements the 2D fourier transformation

Parameters

axIn	: In-out parameter, containing the matriy of data
iWidth	: Width of the matrix (number of columns);
iHeight	: Height of the matrix (number of rows)

Note

The data matrix is interpreted as a 2d array. The method accesses the data as axIn[y][x], where as y is the row and x is the column ID.

ifft()

void TButterflyFFT::ifft	(	TComplex *	axIn,
		Int	iN
	)

Complex inverse fast fourier transformation

Parameters

axIn	: Array of complex numbers as input. The output will be written into the same array
iN	: Number of samples

ifft2D()

void TButterflyFFT::ifft2D	(	TComplex **	axIn,
		Int	iWidth,
		Int	iHeight
	)

This method implements the 2D inverse fourier transformation

Parameters

axIn	: In-out parameter, containing the matriy of data
iWidth	: Width of the matrix (number of columns);
iHeight	: Height of the matrix (number of rows)

Note

The data matrix is interpreted as a 2d array. The method accesses the data as axIn[y][x], where as y is the row and x is the column ID.

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

• ButterflyFFT.h
• ButterflyFFT.cpp