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Nyquist Frequency

In order to recover all Fourier components of a periodic waveform, it is necessary to sample twice as fast as the highest waveform frequency $\nu$,

f_{\rm Nyquist} = 2\nu.

The minimum sampling frequency is called the Nyquist frequency.

See also Fourier Series, Fourier Transform, Nyquist Sampling, Oversampling, Sampling Theorem

© 1996-9 Eric W. Weisstein