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From: "Paul Mennen" <nospam@mennen.org>
Newsgroups: comp.soft-sys.matlab
Subject: Re: fft amplitude relationship
Date: Tue, 6 Jan 2009 16:58:02 +0000 (UTC)
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"Darren " wrote:
> Can someone point me to a technical reference/document that explains
> or discusses this fft (time/freq) amplitude scaling concept.

Chapter 8 of Cleve Moler's well written book "Numerical Computing with Matlab"
contains a nice tutorial aimed at teaching the basics of Fourier Analysis. This book
is available free at: http://www.mathworks.com/moler/

If your math skills are weak and you want a book that starts with the simplest
math concepts and works its way up, check out "Mathematics of the Discrete
Fourier Transform", also available for free at:
 http://ccrma.stanford.edu/~jos/mdft/

If you get very far with fft analysis you will soon run across the idea of fft
windows. Many find the treatment of this topic in books esoteric and hard
to understand, so I wrote a short explanation of fft windows that doesn't
require a PhD in math to understand. This document is available on the
file exchange. (Just search for "winplt").

There are many other on-line sources of information about DSP topics that
you can find with simple google searches.

~Paul