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WHAT IS "FFT"

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Old   March 2, 2006, 12:50
Default WHAT IS "FFT"
  #1
ztdep
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HELLO:

WHAT IS MEANING OF THE FFT.!

REGARDS
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Old   March 2, 2006, 13:05
Default Re: WHAT IS "FFT"
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Chris Bailey
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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.
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Old   March 3, 2006, 00:21
Default Re: WHAT IS "FFT"
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ztdep
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can you give me some free reference ! regards
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Old   March 3, 2006, 04:15
Default Re: WHAT IS "FFT"
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hanman
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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

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Old   March 3, 2006, 06:05
Default Re: WHAT IS "FFT"
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Steve
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I normally direct newbies to this:

http://www.dspguide.com/specanal.htm
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Old   March 5, 2006, 03:48
Default Re: WHAT IS "FFT"
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Rami
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Another alternative is Numerical Recipes (Chap. 12) available online at http://www.library.cornell.edu/nr/cbookfpdf.html
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