In order for a band-limited (i.e., one with a zero Power Spectrum for frequencies ) baseband () signal to be reconstructed fully, it must be sampled at a rate . A signal sampled at is said to be Nyquist Sampled, and is called the Nyquist Frequency. No information is lost if a signal is sampled at the Nyquist Frequency, and no additional information is gained by sampling faster than this rate.

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1999-05-26