EVOLUTIONARY BURG SPECTRAL ESTIMATION

In this letter, we propose a new method to estimate the evolutionary s pectrum of nonstationary signals, By defining the instantaneous statio nary series, this technique applies the Burg spectral estimation metho d to this series at each time to obtain the time-varying autoregressiv e (AR) spectrum of the nonstationary signal, The time-varying model co efficients are efficiently found by a Levinson-like algorithm, This ev olutionary Burg (EB) method can also be used to estimate the instantan eous frequencies of the sinusoids present in the nonstationary signal, Compared to the recently proposed estimators of the evolutionary spec trum, the new technique has better frequency resolution and lower side lobe behavior.