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From:  "A.E lover" <aelover11@gmail.com>
Newsgroups: comp.dsp,comp.soft-sys.matlab
Subject: Normalization for DFT (fft in MATLAB)
Date: Tue, 10 Jul 2007 15:21:09 -0700
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Hi all,

is it correct that to normalize the output of fft such that a unit
sinusoid in the time domain corresponds to unit amplitude in the
frequency domain, I simply divide the DFT by the length of data.
for example data is x(n), I take N point DFT so the normalized output
is  abs(fft(x,N))/N.

Can you please tell me how to prove this?

Thanks

AELOVER