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J. KIMS Technol > Volume 20(3); 2017 > Article
Journal of the Korea Institute of Military Science and Technology 2017;20(3):369-375.
DOI: https://doi.org/10.9766/KIMST.2017.20.3.369   
A Study on Optimal Hydrophone Arrangement for The Direction Finding of High Speed Moving Target in Underwater
Min-Su Han, Jae-Yong Choi, Dong-Seok Kang, Kweon Son, Phil-ho Lee
The 6th Research and Development Institute, Agency for Defense Development
수중에서 고속 기동하는 표적의 방위 탐지를 위한 최적의 청음기 배치 연구
한민수, 최재용, 강동석, 손권, 이필호
국방과학연구소 제6기술연구본부
Abstract
One of good DF(Direction Finding) methods is based on TDOA(Time Difference of Arrival) estimation when finding underwater moving target. For small DF error, high time resolution A/D(Analog-to-digital) conversion board and long baseline are needed. But the result of sea trial about close-range and high speed moving target, spatial correlation coefficient and appeared poor properties below 0.3 when hydrophone arrangement are separated over 6 ${lambda}$ because of underwater fading channel. And we also find out that the distance between hydrophone should be under 4 ${lambda}$ apart to take advantage of spatial correlation coefficient gain and performance of DF in underwater moving channel environments.
Key Words: Underwater Channel, TDOA, Spatial Correlation Coefficient, Direction Finding, Closest Point of Approach(CPA)
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