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http://dx.doi.org/10.9766/KIMST.2011.14.4.590

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

Jung, Tae-Jin (Kyungpook National University)
Kim, Dae-Kyung (Samsung Thales)
Kwon, Bum-Soo (Kyungpook National University)
Yoon, Kyung-Sik (Gimcheon University)
Lee, Kyun-Kyung (Kyungpook National University)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.14, no.4, 2011 , pp. 590-597 More about this Journal
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.
Keywords
Intercept Detection and Ranging Sonar; Wavefront Curvature Ranging; Bearing/Range estimation; Nonlinear Least Square Cost Function;
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