The fractional Fourier transform (FrFT) provides a valuable tool for the analysis of linear chirp signals but short time show Fractional Fourier Transform improved time-frequency resolution. Why?
The short-time FrFT performs the localized fractional Fourier analysis by employing a rigid window function translating along the time axis. The window function is employed to restrict the given signal to a particular part of the time axis. That is how the short-time FrFT gives the localized spectral information (Localized FrFT spectrum)...