What happens to power in spectrum at Nyquist frequency?

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Dan
Dan 2014-2-27
评论： dpb 2014-2-27
I noticed if I produce a sine wave at the Nyquist frequency (1/2 the sample rate) that the power doesn't show up in the spectrum. Here's an example with sample rate = 1024, length of signal = 1024 and frequency = 511.
Things are as they should be. Now with frequency at 512, the Nyqui
st: (not sure why this sentenced got hosed).
Just to complete the demonstration, we'll go t
o 513 Hz.
Aliasing shows up as expected. What happens at 512 Hz, the Nyquist? Where did the power go?
Thanks,
Dan

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