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Signal-adaptive evolutionary spectral analysis using instantaneous frequency estimation

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2 Author(s)
Alcan, A. ; Dept. of Electron. Eng., Istanbul Univ., Turkey ; Chaparro, L.F.

In this paper we present a signal-adaptive algorithm for computing the evolutionary spectra of non-stationary signals. The adaptation is accomplished by estimating the instantaneous frequency of the signal components from an initial evolutionary spectrum. The signal components are obtained applying a masking procedure in the time-frequency plane. Estimating the instantaneous frequency of the signal components permits us to improve the time-frequency resolution of the initial spectrum. The evolutionary spectra is computed using the Gabor representation of the signal. The performance of the proposed signal-adaptive algorithm is illustrated by considering examples of multi-component signals

Published in:

Time-Frequency and Time-Scale Analysis, 1998. Proceedings of the IEEE-SP International Symposium on

Date of Conference:

6-9 Oct 1998