Revision as of 10:26, 21 November 2008 by Mcwalker (Talk | contribs)

Given:

$ y[n]=x[n]*h[n]=\sum_{k=-\infty}^{\infty}(x[k]h[n-k]) $

  1. $ x[n]*h[n]=\sum_{k=-\infty}^{\infty}(x[k]h[n-k]) $
  2. $ k'=n-k $
  3. $ x[n]*h[n]=\sum_{k'=\infty}^{-\infty}(x[n-k']h[k']) $ from 1 and 2
  4. $ x[n]*h[n]=h[n]*x[n] $
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Basic linear algebra uncovers and clarifies very important geometry and algebra.

Dr. Paul Garrett