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- Q1501757 subject Q7013138.
- Q1501757 abstract "The Nyquist frequency, named after electronic engineer Harry Nyquist, is half of the sampling rate of a discrete signal processing system. It is sometimes known as the folding frequency of a sampling system. An example of folding is depicted in Figure 1, where fs is the sampling rate and 0.5 fs is the corresponding Nyquist frequency. The black dot plotted at 0.6 fs represents the amplitude and frequency of a sinusoidal function whose frequency is 60% of the sample-rate (fs). The other three dots indicate the frequencies and amplitudes of three other sinusoids that would produce the same set of samples as the actual sinusoid that was sampled. The symmetry about 0.5 fs is referred to as folding.The Nyquist frequency should not be confused with the Nyquist rate, which is the minimum sampling rate that satisfies the Nyquist sampling criterion for a given signal or family of signals. The Nyquist rate is twice the maximum component frequency of the function being sampled. For example, the Nyquist rate for the sinusoid at 0.6 fs is 1.2 fs, which means that at the fs rate, it is being undersampled. Thus, Nyquist rate is a property of a continuous-time signal, whereas Nyquist frequency is a property of a discrete-time system.When the function domain is time, sample rates are usually expressed in samples/second, and the unit of Nyquist frequency is cycles/second (hertz). When the function domain is distance, as in an image sampling system, the sample rate might be dots per inch and the corresponding Nyquist frequency would be in cycles/inch.".
- Q1501757 thumbnail Aliasing-folding.png?width=300.
- Q1501757 wikiPageWikiLink Q1421156.
- Q1501757 wikiPageWikiLink Q174984.
- Q1501757 wikiPageWikiLink Q175049.
- Q1501757 wikiPageWikiLink Q175086.
- Q1501757 wikiPageWikiLink Q210868.
- Q1501757 wikiPageWikiLink Q316022.
- Q1501757 wikiPageWikiLink Q34467.
- Q1501757 wikiPageWikiLink Q351087.
- Q1501757 wikiPageWikiLink Q39369.
- Q1501757 wikiPageWikiLink Q4637973.
- Q1501757 wikiPageWikiLink Q604241.
- Q1501757 wikiPageWikiLink Q6273772.
- Q1501757 wikiPageWikiLink Q679800.
- Q1501757 wikiPageWikiLink Q7013138.
- Q1501757 wikiPageWikiLink Q7644085.
- Q1501757 wikiPageWikiLink Q868732.
- Q1501757 type Thing.
- Q1501757 comment "The Nyquist frequency, named after electronic engineer Harry Nyquist, is half of the sampling rate of a discrete signal processing system. It is sometimes known as the folding frequency of a sampling system. An example of folding is depicted in Figure 1, where fs is the sampling rate and 0.5 fs is the corresponding Nyquist frequency. The black dot plotted at 0.6 fs represents the amplitude and frequency of a sinusoidal function whose frequency is 60% of the sample-rate (fs).".
- Q1501757 label "Nyquist frequency".
- Q1501757 differentFrom Q6273772.
- Q1501757 depiction Aliasing-folding.png.