Fundamental frequency in DFT [duplicate]

1. What is fundamental frequency DFT?
2. What happens if we apply DFT twice to a signal?
3. What happens if you Fourier transform twice?
4. How do you find the fundamental frequency?

What is fundamental frequency DFT?

For the DFT and Fourier series, only a discrete set of frequencies are used. The discrete frequencies are all a multiple of a specific frequency, denoted ω0, called the fundamental frequency. The variable k is used to specify the particular multiple of the fundamental frequency.

What happens if we apply DFT twice to a signal?

Applying the DFT twice results in a scaled, time reversed version of the original series. The transform of a constant function is a DC value only.

What happens if you Fourier transform twice?

That is, if we apply the Fourier transform twice, we get a spatially reversed version of the function.

How do you find the fundamental frequency?

The fundamental frequency (n = 1) is ν = v/2l.