| A Study on Optimal Hydrophone Arrangement for The Direction Finding of High Speed Moving Target in Underwater |
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Min-Su Han, Jae-Yong Choi, Dong-Seok Kang, Kweon Son, Phil-ho Lee |
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The 6th Research and Development Institute, Agency for Defense Development |
| 수중에서 고속 기동하는 표적의 방위 탐지를 위한 최적의 청음기 배치 연구 |
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한민수, 최재용, 강동석, 손권, 이필호 |
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국방과학연구소 제6기술연구본부 |
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| Abstract |
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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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