Time-frequency signal analysis based on the windowed fractional Fourier transform

  title={Time-frequency signal analysis based on the windowed fractional Fourier transform},
  author={LJubisa Stankovic and Tatiana Alieva and Martin J. Bastiaans},
  journal={Signal Processing},
A new signal-adaptive joint timefrequency distribution for the analysis of nonstationary signals is proposed. It is based on a fractional-Fourier-domain realization of the weighted Wigner distribution producing autoterms close to the ones in the Wigner distribution itself, but with reduced cross-terms. Improvement over the standard time-frequency representations is achieved when the principal axes of a signal (defined as mutually orthogonal directions in the time-frequency plane for which the… CONTINUE READING
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