Detection and Classification of Underwater Transients by Time-Frequency Analysis

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Detection and Classification of Underwater Transients by Time-Frequency Analysis

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Title: Detection and Classification of Underwater Transients by Time-Frequency Analysis
Author: Boashash, B; O'Shea, P
Abstract: Transient. detection techniques are reviewed and methods based on time-frequency signal analysis with the Wigner-Ville distribution (WVD). and the cross Wigner-Ville distribution (XiVD) introduced. The WVD and XWVD are shown to provide high resolution signal characterisation in a time-frequency domain and good noise performance. Simulations of detection of a transient with unknown wave shape using these techniques is seen to perform better than classical energy detection.
Description: This paper presents a number of schemes for transient detection based on the WVD and XWVD, for which the presence of a signal is indicated by a concentration of energy in the time-frequency plane and possible including [ a time-varying filtering operation. (Additional details can be found in the comprehensive book on Time-Frequency Signal Analysis and Processing (see http://www.elsevier.com/locate/isbn/0080443354). In addition, the most recent upgrade of the original software package that calculates Time-Frequency Distributions and Instantaneous Frequency estimators can be downloaded from the web site: www.time-frequency.net. This was the first software developed in the field, and it was first released publicly in 1987 at the 1st ISSPA conference held in Brisbane, Australia, and then continuously updated).
URI: http://hdl.handle.net/10576/10831
Date: 1989-09

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