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Explain me the nature of Fourier transform

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phongle119

phongle119

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Fourier transform

I've learn fourier transform but have not get the nature of its.
Anyone share some thoughs about yours understand of fourier transform

Thanks
 

Re: Fourier transform

Fourier transform is basicly a thematical tool to convert waveform in time domain to frefrequency domain.

Let say we have a picture of a wave for 5 second. A math major will say that they can represent that arbitrary wave ( 5 s ) with a series of sin and cos function.

So how can wave be convert from time to frequency domain???
well, it's like integration and differential equation, we need two or point to be able to determine derivative of a function. Same with fourier transform, We take advantage of knowing ahead of time the wave and convert it to frequency domain.

There is no such thing like instantaneous transform because it's not exist.

Hope it will help
 

    phongle119

    phongle119

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Re: Fourier transform

hi,

I too am lookin for that book that echo47 has told..Its title is Who is Fourier?...can anyone upload it???
happy learning....
 

Re: Fourier transform

echo47 said:
I've heard that this is a very good book. Try your library or bookstore:
h**p://www.amazon.com/exec/obidos/ASIN/0964350408/
Click to expand...

can anybody upload this book? or is this book in edaboard web pages?
 

Re: Fourier transform

actually FT is just a transform which u apply on the signal so that u can see the hidden characteristics of the signal just as u can take X-ray analysis of the human body for any defects as anology(loose sense). Just as if u c the body u cannot say where the problem is but once u have the X-ray copy of it u can diagonise where and wat went wrong. The signal analysis also is as the same way

thnx

purna
 

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