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Encyclopedia: Nyquist frequency
The Nyquist frequency, named after the Swedish-American engineer Harry Nyquist or the Nyquist–Shannon sampling theorem, is half the sampling frequency of a discrete signal processing system. It is som...
en.wikipedia.org/wiki/Nyquist_frequency |
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However, the worst case is when B = fs/2, the Nyquist frequency. A function that is sufficient for that and all less severe cases is:
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error is obtained when frequency f approaches the Nyquist frequency fS / 2. The value of the error from the first term ( V[-1] ) is larger than from the sinusoidal wave as long as frequency f is smaller than about 0.490 fS ( which is 98% of Nyquist frequency = fS / 2 ). This seems reasonable since the input...
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at least twice the highest waveform frequency. The Nyquist frequency, also called the Nyquist limit, is the highest frequency that can be coded at a given...
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Aug 10, 2004 Summary: The Nyquist Frequency corresponds to the highest frequency at which a signal can contain energy and still be compatible with the...
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ΩN=2ΩB is called the "Nyquist frequency" for f(t). For perfect reconstruction to be possible Ωs≥2ΩB where Ωs is the sampling frequency and ΩB is the highest frequency in the signal. Figure 1: Illustration of Nyquist Frequency...
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The first sensor null (the frequency where a complete cycle of the signal covers one sample, hence must be zero regardless of phase) is twice the Nyquist frequency. The sensor's average response (the average of all sampling phases) at the Nyquist frequency can be quite large.
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The contribution from the higher frequencies of the right-hand FT show up at lower frequencies in the main F.T. (centered on zero frequency).
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We compared the proposed estimate to a reference one and found that it performed better: Variance was greatly reduced, and tracking was correct, even beyond the Nyquist frequency...
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