barani at mace.cc.purdue.edu
Thu Jun 29 15:33:03 EST 1995
>Article: 1782 of bionet.xtallography
>From: bmbtdf at leeds.ac.uk (T.D. Flint)
>Subject: Fourier Transforms
>Date: Thu, 29 Jun 1995 13:32:32 +0100 (BST)
>I just can not understand exactly what is going on in a Fourier transform. I
>know that amplitude and phase values are calculated etc and that you end up
>with the power spec. but i have asked SO MANY people what is going on and
>either they don't understand it themselves, or they do and can not explain it
>in such a way for me to understand. Can any body explain it or give me a
>reference that is understandable. I have read many but never quite seem to
Fourier Transform simply gives you the frequencies of various
harmonic waves that combine together and form the particular
signal. In Fourier Series this is the same as representing a
complicated function in terms of a sum of many simple sinusoidal
functions (each with different wavelength).
The best way to understand Fourier Transform is through
numerical methods that is well illustrated in a book
by M.M.Woolfson "An Introduction to X-ray Crystallography".
OR get hold of some book by R.N.Bracewell for signal processing
and Fourier transforms.
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