Least Squares Multi-Window Evolutionary Spectral Estimation


Istanbul University Journal of Electrical and Electronics Engineering, vol.3, no.2, pp.899-903, 2003 (National Refreed University Journal)

  • Publication Type: Article / Article
  • Volume: 3 Issue: 2
  • Publication Date: 2003
  • Title of Journal : Istanbul University Journal of Electrical and Electronics Engineering
  • Page Numbers: pp.899-903


We present a multi-window method for obtaining the time-frequency spectrum of non-stationary
signals such as speech and music. This method is based on optimal combination of evolutionary
spectra that are calculated by using multi-window Gabor expansion. The optimal weights are
obtained by using a leastsquare estimation method. An error criterion thatisthe squared distance
between a reference time-frequency distribution and the combination ofevolutionary spectra is
minimizedtodetermine the weights. Examples are giventoillustrate the effectiveness of  the
proposed method.