Wednesday, April 24, 2013

Nyquist Regions

Basically this sampling technique divides the spectrum up into regions that are fs wide. So if your sampling rate is say, 10 kHz, you can look at the region from -5 kHz to 5 kHz, or from 5kHz to 15 kHz, or 15 to 25, etc.

Nyquist zones are Fs/2 wide. Each Nyquist zone contains a copy of the same spectrum (the spectrum in a Nyquist zone is the mirror image of the spectrum of the neighboring zones).

** This applies to real-valued signals only (mirroring does not occur for complex signals and for these Nyquist zones are fs wide)

No comments:

Post a Comment