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Variable notation for DTFT?! 
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#1
Feb1611, 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. 


#2
Feb1711, 09:31 AM

Sci Advisor
PF Gold
P: 2,063

[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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