Wavelet Packet Transform Method and its Application in Analysing Ocean Signals

Abstract:

In the marine study field, it always analysis the kinds of acquisition signals to extract the meaningful data. In this paper, a method of wavelet packet transformation (WPT) is suggested to the analytical ocean signals, such as the tidal level in the event of typhoon. It's known that the tidal level contains different frequency of astronomical tidal components and storm surge components, so it can be decomposed by using WPT to separate them into serials of frequency bands signals. Specifically, the storm surge process curve can be extracted independently by reconstructing the exclusive decomposed wavelet packet coefficients for our deeply research in the future. Taking one of typhoon measured tidal levelas an example to validation the opinion, the storm surge is calculated by using the presented method.Compared with the value calculated by traditional linear method, it shows that the suggested method can preferably separate storm surge and also has applied significance in analysising the ocean signals.

• Periodical: Applied Mechanics and Materials (Volumes 239-240)
• Pages: 1142-1147
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.239-240.1142
• Online since: December 2012
• Authors: Shi Jun He, Wen Jun Zhou
• Keywords: Measured Tidal Level Signal, Separate, Storm Surge, Wavelet Packet Transformation

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