From help-request at octave dot org Tue Feb  8 11:57:56 2005
Subject: Re: Right function for Discrete Convolution
From: NZG <ngustavson at emacinc dot com>
To: help at octave dot org
Cc: Quentin Spencer <qspencer at ieee dot org>
Date: Tue, 8 Feb 2005 11:47:08 -0600

> Convolution returns an output longer than its inputs by definition.
Does it? Perhaps I am misunderstanding convolution altogether.
I have always learned it from the control standpoint, as being 
x(n)*y(n) =
the infinite summation of x(k)y(n-k) from k=-infy to k=infy for all n.

This would imply the same dimension, n, would it not?
Am I missing something?
Does anyone have any links that explain why the dimension changes? 

thx,
NZG. 



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