WHAT IS "FFT"

March 2, 2006, 11:50

HELLO:

WHAT IS MEANING OF THE FFT.!

REGARDS

March 2, 2006, 12:05

You probably mean "Fast Fourier Transform", which is a calculation trick using successive divisions by two to calculate the Fourier Transform rapidly.

Fourier transforms are ways to transform a dataset of a response variable of an independant variable into a sum (no doubt here a finite sum) of sine and cosine waves with integer frequencies through the dataset, having amplitudes calculated by the transform method. Often the independant variable is time or perhaps length.

March 2, 2006, 23:21

can you give me some free reference ! regards

March 3, 2006, 03:15

there are lot of references, just type fft in google, u will get immense references, or else take any mathes text book, u will find in detail

March 3, 2006, 05:05

I normally direct newbies to this:

http://www.dspguide.com/specanal.htm

March 5, 2006, 02:48

Another alternative is Numerical Recipes (Chap. 12) available online at http://www.library.cornell.edu/nr/cbookfpdf.html

March 2, 2006, 11:50	WHAT IS "FFT"	#1
ztdep Guest Posts: n/a	HELLO: WHAT IS MEANING OF THE FFT.! REGARDS

March 2, 2006, 12:05	Re: WHAT IS "FFT"	#2
Chris Bailey Guest Posts: n/a	You probably mean "Fast Fourier Transform", which is a calculation trick using successive divisions by two to calculate the Fourier Transform rapidly. Fourier transforms are ways to transform a dataset of a response variable of an independant variable into a sum (no doubt here a finite sum) of sine and cosine waves with integer frequencies through the dataset, having amplitudes calculated by the transform method. Often the independant variable is time or perhaps length.

March 2, 2006, 23:21	Re: WHAT IS "FFT"	#3
ztdep Guest Posts: n/a	can you give me some free reference ! regards

March 3, 2006, 03:15	Re: WHAT IS "FFT"	#4
hanman Guest Posts: n/a	there are lot of references, just type fft in google, u will get immense references, or else take any mathes text book, u will find in detail

March 3, 2006, 05:05	Re: WHAT IS "FFT"	#5
Steve Guest Posts: n/a	I normally direct newbies to this: http://www.dspguide.com/specanal.htm

March 5, 2006, 02:48	Re: WHAT IS "FFT"	#6
Rami Guest Posts: n/a	Another alternative is Numerical Recipes (Chap. 12) available online at http://www.library.cornell.edu/nr/cbookfpdf.html

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
FFT for Post Simulation Analysis	faisal_durr	CFX	12	March 13, 2012 03:35
FFT solver for Poisson equation	mranji1	Main CFD Forum	1	November 16, 2009 01:12
qurey regarding fft.	sunil	Main CFD Forum	0	June 26, 2008 02:11
PIV: fft cross-correlation with large searchwindow	Liang	Main CFD Forum	0	April 11, 2005 14:39
fft of unsteady solution	K S Chang	Main CFD Forum	6	January 15, 2004 06:42