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Re: signal processing

From: David Bateman
Subject: Re: signal processing
Date: Thu, 9 Sep 2004 10:01:43 +0200
User-agent: Mutt/1.4.1i

According to robert quinto <address@hidden> (on 09/09/04):
> Hi!
> I'm a newbie here, and I'm just staring to use Octave
> for my school project on digital sugnal processing.
> Can I ask help from anyone about any source code or
> important function in octave that could transfom
> time-domain signals to frequency domain signals?
> Thanks!
> Booboy

Errr, perhaps you should read a little about Fourier Transforms.  So
then the basic functions to look at are fft, etc.... If what you mean
by frequency domain signals is more power spectral densities, then the
function pwelch from octave-forge is what you need.. Explaining
windowing, etc of dicrete fourier transforms and their effects on the
accuracy of the result can't really be explained in such a short
e-mail, so I won't go into why pwelch is better for a power spectral
densities than a straight fft..


David Bateman                                address@hidden
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