Nyquist frequency - Wikipedia
网页In signal processing, the Nyquist frequency (or folding frequency), named after Harry Nyquist, is a characteristic of a sampler, which converts a continuous function or signal into a discrete sequence.
奈奎斯特频率 - 维基百科，自由的百科全书
网页奈奎斯特频率 （英語： Nyquist frequency）是离散信号系统 采样频率 的一半，因瑞典裔美國工程師 哈里·奈奎斯特 （Harry Nyquist）或 奈奎斯特－香农采样定理 得名。. 采样定理指出，只要离散系统的奈奎斯特频率高于被采样信号的最高频率或 带宽，就可以避免 混 ...
怎样理解Nyquist采样定理？ - 知乎
网页这就是Nyquist-Shannon采样定理，我们希望同时看到轮子的旋转和相位变化，采样周期要小于整数周期的1/2，采样频率应该大于原始频率的2倍。同理，对于模拟信号，我们希望同时看到信号的各种特性，采样频率应该大于原始模拟信号的最大频率的两倍，否则将发生 ...
采样定理推导(The Nyquist–Shannon sampling theorem) - 知乎
网页此处最高频率的2倍叫奈奎斯特频率 (Nyquist frequency)。 若采样频率不满足此条件，就会让原始信号频谱产生 频谱混叠 (aliasing) 现象，从而无法正确恢复原始信号。
Nyquist rate - Wikipedia
网页In signal processing, the Nyquist rate, named after Harry Nyquist, is a value equal to twice the highest frequency (bandwidth) of a given function or signal. It has units of samples per unit time, conventionally expressed as samples per second, or hertz (Hz). [1]
Nyquist–Shannon sampling theorem - Wikipedia
网页The Nyquist–Shannon sampling theorem is an essential principle for digital signal processing linking the frequency range of a signal and the sample rate required to avoid a type of distortion called aliasing. The theorem states that the sample rate must be at least twice the bandwidth of the signal to avoid aliasing.
奈奎斯特频率 - 百度百科
网页奈奎斯特稳定性判据是用开环频率特性的 Nyquist图来判别闭环系统的稳定性，它是判别系统稳定性的图解法。 因此，也可以说是一种几何判据 [7] 。 新手上路
奈奎斯特采样定理（Nyquist） - CSDN博客
网页2023年10月16日 · 奈奎斯特采样定理（Nyquist Sampling Theorem）是指在进行信号采样时，为了能够准确地还原原始信号，采样频率必须至少是信号最高频率的两倍。 这个定理是由美国工程师哈里·奈奎斯特（Harry Nyquist ）在20世纪20年代...
Nyquist Frequency -- from Wolfram MathWorld
网页2024年8月22日 · The Nyquist frequency, also called the Nyquist limit, is the highest frequency that can be coded at a given sampling rate in order to be able to fully reconstruct the signal, i.e., f_(Nyquist)=1/2nu. In order to recover all Fourier components of a periodic waveform, it is necessary to use a sampling rate nu at least twice the highest waveform ...
Nyquist Frequency - an overview | ScienceDirect Topics
网页The frequency of π radian/ (sampling interval) is known as the Nyquist frequency. If the length of the sampling interval is A seconds the Nyquist frequency is π radians/second or equivalently 1/ (2Δ) Hz. Frequencies which are higher than the Nyquist frequency will, after sampling, be indistinguishable from frequencies below the Nyquist frequency.
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