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Multiple Targets Detection by using CLEAN Algorithm in Matched Field Processing  

Lim Tae-Gyun (동양대학교)
Lee Sang-Hak (동양대학교)
Cha Young-Wook (안동대학교)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.10, no.9, 2006 , pp. 1545-1550 More about this Journal
Abstract
In this paper, we propose a method for applying the CLEAN algorithm to an minimum variance distortionless response(MVDR) to estimate the location of multiple targets distributed in the ocean. The CLEAN algorithm is easy to implement in a linear processor, yet not in a nonlinear processor. In the proposed method, the CSDM of a Dirty map is separated into the CSDM of a Clean beam and the CSDM of the Residual, then an individual ambiguity surface(AMS) is generated. As such, the CLEAN algorithm can be applied to an MVDR, a nonlinear processor. To solve the ill-conditioned problem related to the matrix inversiion by an MVDR when using the CLEAN algorithm, Singular value decomposition(SVD) is carried out, then the reciprocal of small eigenvalues is replaced with zero. Experimental results show that the proposed method improves the performance of an MVDR.
Keywords
SONAR; MFP; CLEAN;
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