Variable notation for DTFT?!

by Jammin_James
Tags: dtft, notation, variable
Jammin_James is offline
Feb16-11, 09:00 PM
P: 49
Can someone explain to me why sometimes I see the DTFT as functions of capital omegas or e^(jomega).

I'm failing to see the reason.
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marcusl is offline
Feb17-11, 09:31 AM
Sci Advisor
PF Gold
P: 2,020
[tex]\Omega[/tex] usually refers to continuous frequency, which is often appropriate for the DTFT. The z transform is also used heavily in DSP, and it covers the full complex plane. Use of [tex]exp(j\omega)[/tex] makes it very clear that you are evaluating the frequency response (which is on the unit circle).

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