Proposed a frequency analysis of short-time Fourier transform FFT refinement (shorttimeFouriertransform, referred to as STFT) A new method. STFT essence of the windowed Fourier transform, the data within the window satisfies the stationary conditions spectrum obtained by Fourier transform, and based time interval finally get moving window function frequency representation. refinement FFT has a higher frequency resolution in the analysis of the frequency range, the refinement of the FFT applied STFT window data, which can effectively improve the STFT time-frequency aggregation

SFFT.m

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