Comparison of time-frequency representations of random wave elevation data

Y. J. Shin, E. J. Powers, E. Yi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper is concerned with examining the nonstationary characteristics of laboratory-generated random waves. To do this we utilize and compare a number of time-frequency distributions belonging to Cohen's class, namely, the spectrogram, and the Wigner-Ville, Choi-Williams, and the reduced-interference distribution (RID). We also considere time-scale auto-power spectra, cross-spectra, and linear coherence spectra all of which are based on the continuous wavelet transform. With regard to Cohen's class, the RID distribution appears to be most suitable for analyzing random wave data. The wavelet-based approach appears to be most appropriate for generating complex valued time-scale spectra, such as the cross-power spectrum and the bispectrum.

Original languageEnglish
Title of host publicationProceedings of the 1999 Ninth International Offshore and Polar Engineering Conference (Volume 3), Brest, France, 30 May - 4 June 1999
EditorsJ S Chung, M Olagnon, C H Kim, A Francescutto, J S Chung, M Olagnon, C H Kim, A Francescutto
PublisherInternational Society of Offshore and Polar Engineers
Pages34-40
Number of pages7
ISBN (Print)1880653427
Publication statusPublished - 1999 Dec 1
EventProceedings of the 1999 Ninth International Offshore and Polar Engineering Conference - Brest, France
Duration: 1999 May 301999 Jun 4

Other

OtherProceedings of the 1999 Ninth International Offshore and Polar Engineering Conference
CountryFrance
CityBrest
Period99/5/3099/6/4

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)
  • Engineering(all)
  • Environmental Science(all)

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  • Cite this

    Shin, Y. J., Powers, E. J., & Yi, E. (1999). Comparison of time-frequency representations of random wave elevation data. In J. S. Chung, M. Olagnon, C. H. Kim, A. Francescutto, J. S. Chung, M. Olagnon, C. H. Kim, & A. Francescutto (Eds.), Proceedings of the 1999 Ninth International Offshore and Polar Engineering Conference (Volume 3), Brest, France, 30 May - 4 June 1999 (pp. 34-40). International Society of Offshore and Polar Engineers.