Estimation of a source range using acoustic wavefront in bottom reflection environment

Joung-Soo Park; Jungyong Park; Su-Uk Son; Ho Seuk Bae

doi:10.7776/ASK.2024.43.3.324

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2024 Vol.43, Issue 3 Preview Page Next Page

Research Article

Estimation of a source range using acoustic wavefront in bottom reflection environment 해저면 반사 환경에서 음파의 파면을 이용하는 음원의 거리 추정

31 May 2024. pp. 324-334

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Abstract

The Wavefront Curvature Ranging (WCR) is an estimation method for a source range from the wavefront curvature of acoustic waves. The conventional method uses trigonometry to estimate the source range by assuming the sound speed as a constant. Because of this assumption, range error occurs in the ocean environment where the bottom reflection is clearly separated. In order to reduce the range error, Matched Wavefront Curvature Ranging (MWCR) was proposed applying the sound speed structure in the ocean environment and Maximum Likelihood Estimation (MLE). The range error was reduced in the results of the simulation on the proposed method. In the future, this method will be applicable to the sonar system if the reliability of ranging is confirmed by measured signal.

Keywords

Wavefront curvature ranging

Matched wavefront curvature ranging

Sound speed structure

Bottom reflection

Range error

파면곡률거리추정(Wavefront Curvature Ranging, WCR)은 음파의 파면곡률로부터 음원의 거리를 추정하는 방법이다. 기존의 파면곡률거리추정은 음속을 상수로 가정하고 삼각법으로 거리를 추정한다. 이 가정 때문에 해저면반사경로가 뚜렷하게 분리되는 해양환경에서는 거리 오차가 발생한다. 거리 오차를 줄이기 위해 해양의 음속구조를 적용하고 최대우도추정(Maximum Likelihood Estimation, MLE)방법으로 거리를 추정하는 정합 파면곡률거리추정(Matched Wavefront Curvature Ranging, MWCR) 을 제안하였다. 정합 파면곡률거리추정의 시뮬레이션 결과로부터 거리 오차의 감소를 확인하였다. 향후에 실측 신호로부터 거리 추정의 신뢰성을 확인하면 소나 시스템에 적용 가능할 것이다.

키워드

파면곡률거리추정

정합 파면곡률거리추정

음속구조

해저면반사

거리 오차

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 43
No :3
Pages :324-334
Received Date : 2024-03-12
Revised Date : 2024-05-03
Accepted Date : 2024-05-11
DOI :https://doi.org/10.7776/ASK.2024.43.3.324

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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