Nyquist Frequency

What Does Nyquist Frequency Mean?

The Nyquist frequency is a type of sampling frequency that uses signal processing that is defined as “half of the rate” of a discrete signal processing system. It is the highest frequency that can be coded for a particular sampling rate so that the signal can be reconstructed.


The Nyquist frequency is also known as the folding frequency.

Techopedia Explains Nyquist Frequency

The Nyquist frequency refers to the point where it is possible to build a visual model of a signal. This goes back to a concept in discrete time sampling called “aliasing.” The idea here is that two samples per cycle are needed in order to sufficiently demonstrate a signal. This idea is called the “Nyquist theorem.” Developers and engineers look at issues with sampling, including undersampling and oversampling, to try to optimize waveforms and sampling for signal processing efforts.


Related Terms

Latest Computer Science Terms

Related Reading

Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…