Frequency-domain zero padding - special treatment of X[N/2]

1. What is the effect of zero padding in frequency domain?
2. What does zero padding do in FFT?
3. How does zero padding increase frequency resolution?
4. How to do zero padding for DFT?

What is the effect of zero padding in frequency domain?

In this case, we can say “zero padding in the frequency domain results in an increased sampling rate in the time domain”.

What does zero padding do in FFT?

``Zero-padding'' means adding additional zeros to a sample of data (after the data has been windowed, if applicable). For example, you may have 1023 data points, but you might want to run a 1024 point FFT or even a 2048 point FFT.

How does zero padding increase frequency resolution?

In summary, the use of zero-padding corresponds to the time-limited assumption for the data frame, and more zero-padding yields denser interpolation of the frequency samples around the unit circle. Sometimes people will say that zero-padding in the time domain yields higher spectral resolution in the frequency domain.

How to do zero padding for DFT?

The resolution is determined by the number of samples and the sample rate. Pad the DFT out to 2000, or twice the original length of x . With this length, the spacing between DFT bins is F s / 2 0 0 0 = 0 .