Howtosignalprocessing
- What is the difference between FFT and STFT?
- What is STFT spectrogram?
- How to get STFT in matlab?
- How to Compute STFT?
What is the difference between FFT and STFT?
FFT has a resolution of 2048 lines, Blackman window, and 50% overlap and STFT also has Block size 2048, FFT size 16K, Blackman window used, and 50% overlap. As we can see, STFT performs better with the same block size (but more calculated lines). We improved frequency resolution for the same amount of scooped data.
What is STFT spectrogram?
s = spectrogram( x ) returns the Short-Time Fourier Transform (STFT) of the input signal x . Each column of s contains an estimate of the short-term, time-localized frequency content of x . The magnitude squared of s is known as the spectrogram time-frequency representation of x [1].
How to get STFT in matlab?
s = stft( x ) returns the Short-Time Fourier Transform (STFT) of x . s = stft( x , fs ) returns the STFT of x using sample rate fs . s = stft( x , ts ) returns the STFT of x using sample time ts .
How to Compute STFT?
In practice, the procedure for computing STFTs is to divide a longer time signal into shorter segments of equal length and then compute the Fourier transform separately on each shorter segment. This reveals the Fourier spectrum on each shorter segment.
