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词汇 Nyquist sampling rate
分类 英语词汇 英语翻译词典
释义

Nyquist sampling rate

英语百科

Nyquist rate

Fig 1: Fourier transform of a bandlimited function (amplitude vs frequency)
Fig 2: The top 2 graphs depict Fourier transforms of 2 different functions that produce the same results when sampled at a particular rate.  The baseband function is sampled faster than its Nyquist rate, and the bandpass function is undersampled, effectively converting it to baseband.  The lower graphs indicate how identical spectral results are created by the aliases of the sampling process.

In signal processing, the Nyquist rate, named after Harry Nyquist, is twice the bandwidth of a bandlimited function or a bandlimited channel. This term means two different things under two different circumstances:

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