What is a Nyquist in Terms of Frequency?

[fsonnichsen]

Can anyone tell me the definition of a "Nyquist" with respect to units of frequency? I didn't find it defined on the web. I presume it is some measure of cycles/sample or similar

Thanks
Fritz

 

[NascentOxygen]

Can anyone tell me the definition of a "Nyquist" with respect to units of frequency?

It isn't. But I can see that a creative author might decide he can use it as a measure of the ratio of two frequencies.

Do you have a reference to where you found it? Some topic dealing with sampling an analog signal, I presume.

 

[fsonnichsen]

This was in a draft of a textbook. I tend to agree with your premise that this is a "home spun" term.

Thanks
Fritz

 

[AlephZero]

In digital signal processing it is quite common to measure frequency relative to the Nyquist frequency (which depends on the sample rate of course). That is no different from other dimensionless quantities used in physics (e.g. Reynolds number).

But I've never seen the term "a Nyquist" used.

 

[sardar]

I can explain that Nyquist frequency is a term used in signal processing and digital signal sampling. It is defined as half of the sampling rate, or the maximum frequency that can be accurately represented in a digital system. This is based on the Nyquist-Shannon sampling theorem, which states that a signal must be sampled at a rate of at least twice its highest frequency component in order to accurately reconstruct the original signal. Therefore, the Nyquist frequency is a crucial factor in determining the sampling rate for digital systems to avoid signal distortion and aliasing. It is typically measured in hertz (Hz), the unit of frequency, and is an important concept in digital signal processing and communication systems. I hope this helps clarify the definition of Nyquist frequency for you.