HUI Junying ZHOU Wei Mei Jidan Men Lijie ZHAO Anbang

(1 College of Underwater Acoustic Engineering, Harbin Engineering University Harbin 150001)

(2 Dalian Scientific Test & Control Technology Institute Dalian  116013)

Received Dec. 26, 2008

Revised Feb. 16, 2009

Abstract For improving passive ranging of three-sensor array, a sliding cross-correlation method is adopted to improve the performance of time delay estimation. Compared with the traditional cross-correlation, the sliding cross-correlation's ability is evidently increased. An improved formula which is in high precision for near target is employed. An algorithm of kicking out wild value is presented, which is on line, can track the target automatically. The algorithm named "round filter" can pick out the data in high quality with robustness. A "dynamic filter" is presented, which is combined with the "round filter" as the post processor. The experimental result of three-sensor array passive ranging of near field target in shallow water is introduced, which suggests that the post processor is indeed obvious in improving the ranging performance.　　　 

PACS numbers: 43.30, 43.60