Define Nyquist frequency. Nyquist frequency synonyms, Nyquist frequency pronunciation, Nyquist frequency translation, English dictionary definition of Nyquist frequency. Noun 1. Nyquist frequency - twice the maximum frequency occurring in the transmitted
The Nyquist frequency is half the sampling frequency when a continuous-time function is sampled at equally spaced time points. That is, the Nyquist frequency is pi/delta (in radians per unit time) where delta is the time interval between two successive sampled data. This report discusses the ...
Given these samples, we can reconstruct x(t) by generating a periodic impluse train in which successive impluse have amplitudes that are successive sample values. This impluse train is then processed through an ideal lowpass filter with gain T and cutoff frequency greater than wMand less than ws...
奈奎斯特采样定理 NYQUIST SAMPLING THEOREM A signal must be sampled at a rate, fs, which is at least twice the highest frequency component, fm, present in the signal to avoid the loss of information.…
In view of the problem of that the nyquist sampling theorem astricts the sample rate and precision Measurement of high frequency signal must cost highly to match suitable high sample rate, in this paper we present a Frequency Measurement Algorithm based on Sub-nyquist Sampling. 针对奈奎斯特采样定...
To avoid aliasing, the Nyquist frequency must be strictly greater than the maximum frequency component within the signal. If the signal contains a frequency component at precisely the Nyquist frequency then the corresponding component of the sample values cannot have sufficient information to reconstruct...
Sample period (ms)Nyquist frequency (Hz) 1 500 2 250 4 125 8 62.5 Note that the farther the data is sampled below the Nyquist frequency, the less worry there is of distorting amplitudes which is important to AVO and reservoir property prediction. Seismic data can be acquired, processed and...
The minimum sample frequency that allows reconstruction of the original signal, that is 2W samples per unit distance, is known as the Nyquist frequency, (or Nyquist rate). The time inbetween samples is called the Nyquist interval. If S(f) = 0 for |f| > W, then s(x) can be recovered...
The frequency beyond which cyclic effects are unobservable is called the Nyquist or folding frequency . This frequency is related to the sampling rate 螖t and is in fact 1/2 螖t cycles per unit time. Keywords: folding frequency; sampling; digitizing; discrete; analogue to digitalG. J. ...
By carefully choosing a sample frequency, the application can place the Nyquist point at any value. As a result, the alias frequency of the high-frequency component can be precisely placed anywhere in the frequency spectrum. The amplitude of the alias will be exactly the same as the amplitude...