Fft window gain

1. How does windowing affect FFT?
2. Why do we use window for FFT?
3. What is windowing in DFT?

How does windowing affect FFT?

You can minimize the effects of performing an FFT over a noninteger number of cycles by using a technique called windowing. Windowing reduces the amplitude of the discontinuities at the boundaries of each finite sequence acquired by the digitizer.

Why do we use window for FFT?

Windows Reduce FFT Leakage

By using windowing functions, you can further enhance the ability of an FFT to extract spectral data from signals. Windowing functions act on raw data to reduce the effects of the leakage that occurs during an FFT of the data.

What is windowing in DFT?

Lecture 5 - DFT & Windowing. Page 1. In this lecture, I will be examining the impact of extracting a portion of a signal and find the spectrum of this extracted portion instead of the signal. This process of taking a portion of signal is known as “windowing”.