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Lecture 1: Useful Signal Operations

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Schedule :: Intro :: Signal Models for Discrete-Time :: Signal Operations :: Difference Equations :: Zero-Input :: Zero-State :: Natural & Forced :: System Stability

Essentially the same as for continuous time:

Time shifting:
$f[k+m]$ (shift left by $m$ ), etc.

Time reversal
$f[-k]$
Time compression: Decimation

\begin{displaymath}g[k] = f[2k]
\end{displaymath}

(take every other point)

Time expansion

\begin{displaymath}g[k] = f[k/2]
\end{displaymath}

when $k/2$ is an integer.
Copyright 2008, by the Contributing Authors. Cite/attribute Resource . admin. (2006, May 16). Lecture 1: Useful Signal Operations. Retrieved January 07, 2011, from Free Online Course Materials — USU OpenCourseWare Web site: http://ocw.usu.edu/Electrical_and_Computer_Engineering/Signals_and_Systems/1_2node2.html. This work is licensed under a Creative Commons License Creative Commons License