Fft - spectral leakage from noise into target frequency?

1. What causes spectral leakage in FFT?
2. How do you deal with spectral leakage?
3. Why does spectral leakage happen?
4. What is frequency leakage?

What causes spectral leakage in FFT?

Spectral leakage due to FFT is caused by: mismatch between desired tone and chosen frequency resolution, time limiting an observation. Understand the concept using hands-on examples.

How do you deal with spectral leakage?

We have seen that spectral leakage is reduced by tapering the digital signal by a window function before the DFT takes place. A generalization of this technique is the short-time discrete Fourier transform (STDFT).

Why does spectral leakage happen?

Spectral leakage occurs when a non-integer number of periods of a signal is sent to the DFT. Spectral leakage lets a single-tone signal be spread among several frequencies after the DFT operation. This makes it hard to find the actual frequency of the signal.

What is frequency leakage?

Leakage is the smearing of energy from the true frequency of the signal into adjacent frequencies. Leakage also causes the amplitude representation of the signal to be less than the true amplitude of the signal.