Bearing/Range Estimation Method using NLS Cost Function in IDRS System

Jung, Tae-Jin; Kim, Dae-Kyung; Kwon, Bum-Soo; Yoon, Kyung-Sik; Lee, Kyun-Kyung

doi:2011.14.4.590

J. KIMS Technol > Volume 14(4); 2011 > Article

Journal of the Korea Institute of Military Science and Technology 2011;14(4):590-597.
DOI: https://doi.org/10.9766/KIMST.2011.14.4.590

Bearing/Range Estimation Method using NLS Cost Function in IDRS System

Tae-Jin Jung, Dae-Kyung Kim, Bum-Soo Kwon, Kyung-Sik Yoon, Kyun-Kyung Lee

¹Kyungpook National University
²Samsung Thales
³Gimcheon University

IDRS 시스템에서 Curve Fitting이 적용된 NLS 비용함수를 이용한 방위/거리 추정 기법

정태진, 김대경, 권범수, 윤경식, 이균경

¹경북대학교
²삼성탈레스
³김천대학교

Abstract

The IDRS provides detection, classification and bearing/range estimation by performing wavefront curvature analysis on an intercepted active transmission from target. Especially, a estimate of the target bearing/range that significantly affects the optimal operation of own submarine is required. Target bearing/range can be estimated by wavefront curvature ranging which use the difference of time arrival at sensors. But estimation ambiguity occur in bearing/range estimation due to a number of peaks caused by high center frequency and limited bandwidth of the intercepted active transmission and distortion caused by noise. As a result the bearing/range estimation performance is degraded. To estimate target bearing/range correctly, bearing/range estimation method that eliminate estimation ambiguity is required. In this paper, therefore, for wavefront curvature ranging, NLS cost function with curve fitting method is proposed, which provide robust bearing/range estimation performance by eliminating estimation ambiguity. Through simulation the performance of the proposed bearing/range estimation methods are verified.

Key Words: Intercept Detection and Ranging Sonar, Wavefront Curvature Ranging, Bearing/Range estimation, Nonlinear Least Square Cost Function