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## Homework Statement

There seems to be varying answers on what the definition of "Nyquist Frequency" is, between my professor, myself, and various internet sites.

One group says:

"The Nyquist Frequency is 1/2 the sampling rate"

and the other group says:

"The Nyquist Frequency is twice the signal's bandwidth"

Both groups agree that your sampling rate must be twice the signal's bandwidth to avoid aliasing, but when a problem simply says "the sampling rate is x, and the signal's bandwidth is y, what is the Nyquist Frequency?" I get different answers depending on which definition I use.

Which is the correct definition, and how can I argue this to my professor?

## Homework Equations

## The Attempt at a Solution

Sources, group 1:

http://en.wikipedia.org/wiki/Nyquist_frequency

http://www.encyclopedia.com/doc/1O13-Nyquistfrequency.html

Sources, group 2:

http://www2.egr.uh.edu/~glover/applets/Sampling/Sampling.html

Google "Nyquist Frequency Definition" and google shows up as group 2.