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Analysys of the characteristics of manuvering underwater vessels  

윤병우 (경성대학교 전기전자공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.7, no.6, 2003 , pp. 1123-1129 More about this Journal
Abstract
The noise of maneuvering submarines or vessels can be divided into the tonal signals and broadband ambient noise. Tonal signals are from the revolution of motors and engines of vessels, and broadband ambient noise is from the bubbles which are generated by the propellers and the flow of water around vessels. We can analyze the kinds and the speed of vessels if we analyze the tonal signals and ambient noise. But, it is difficult to divide the tonal signals form the ambient noise when the power of tonal signal is much weaker than the power of ambient noise. In this paper, we detect the direction of arrival(DOA) of the noises generated by vessels with the automatic tracking window(ATW) preprocessing algorithm, and make a beam to the direction of the targets. We suggest a method which can separate weak tonal signals from broadband ambient noise with the ATW algorithm.
Keywords
Sonar; DOA; Ambient noise; ATW algorithm;
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