Windowed Fourier Transform

1. What is windowing in FFT?
2. Which transform is also called windowed Fourier transform?
3. What is windowing in DFT?

What is windowing in FFT?

Windowing reduces the amplitude of the discontinuities at the boundaries of each finite sequence acquired by the digitizer. Windowing consists of multiplying the time record by a finite-length window with an amplitude that varies smoothly and gradually toward zero at the edges.

Which transform is also called windowed Fourier transform?

Forward STFT

Given that the STFT is essentially a Fourier transform times a window function, the STFT is also called windowed Fourier transform or time-dependent Fourier transform.

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”.