Signal-adaptive evolutionary spectral analysis using instantaneous frequency estimation

Akan A., Chaparro L.

IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis, Pennsylvania, Amerika Birleşik Devletleri, 6 - 09 Ekim 1998, ss.661-664 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası:
  • Doi Numarası: 10.1109/tfsa.1998.721511
  • Basıldığı Şehir: Pennsylvania
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.661-664
  • İstanbul Üniversitesi Adresli: Hayır

Özet

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.