Comparison of time-frequency representations of random wave elevation data

Yong June Shin, Edward J. Powers, Eun jik Yi

Research output: Contribution to conferencePaper

1 Citation (Scopus)

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 consider 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
Pages34-40
Number of pages7
Publication statusPublished - 1999 Jan 1
EventProceedings of the 1999 9th International Offshore and Polar Engineering Conference (ISOPE-99) - Brest
Duration: 1999 May 301999 Jun 4

Other

OtherProceedings of the 1999 9th International Offshore and Polar Engineering Conference (ISOPE-99)
CityBrest
Period99/5/3099/6/4

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All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

Cite this

Shin, Y. J., Powers, E. J., & Yi, E. J. (1999). Comparison of time-frequency representations of random wave elevation data. 34-40. Paper presented at Proceedings of the 1999 9th International Offshore and Polar Engineering Conference (ISOPE-99), Brest, .