The sampling frequency of digital signal processing is the spectrum interval except the number of sampling points. Is this spectrum interval the frequency resolution? The greater the frequency resolut

The sampling frequency of digital signal processing is the spectrum interval except the number of sampling points. Is this spectrum interval the frequency resolution? The greater the frequency resolution, the better. The sampling frequency of digital signal processing is the spectrum interval except the number of sampling points. Is this spectrum interval the frequency resolution?

-Not resolution, resolution = the reciprocal of the recording time length of the original analog signal.

The greater the frequency resolution, the better-yes, but the amount of data also increases, resulting in long calculation time and high cost.

For a given [fixed] data, increasing the number of DFT points can only reduce the fence effect, but not improve the resolution of spectral analysis.

For example, the speech signal of 1 s is sampled at 8000 points, and then the resolution is the same as that of 16000 points DFT.