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http://dx.doi.org/10.7776/ASK.2022.41.2.210

Method for eliminating source depth ambiguity using channel impulse response patterns  

Cho, Seongil (Defense Test & Evaluation Research Institute, Agency for Defense Development)
Publication Information
The Journal of the Acoustical Society of Korea / v.41, no.2, 2022 , pp. 210-217 More about this Journal
Abstract
Passive source depth estimation has been studied for decades since the source depth can be used for target classification, target tracking, etc. The purpose of this paper is to solve the problem of ambiguity in the previous paper [S.-il. Cho et al. (in Korean), J. Acoust. Soc. Kr. 38, 120-127 (2019)] that source depth is estimated in two points. The patterns of phase shift of Channel Impulse Response(CIR) reflected in ocean surface and bottom is used for removing ambiguity of the source depth estimation, and after removing ambiguity, source depth is estimated at one point through the intersection of CIR. In order to extract CIR in case of unknown source signal and continuous signal or noise, Ray-based blind deconvolution is used. The proposed algorithm is demonstrated through numerical simulation in ocean waveguide.
Keywords
Source depth estimation; Shallow water; Ray-based Blind Deconvolution (RBD); Channel Impulse Response (CIR);
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