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http://dx.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  

Han, Min-Su (The 6th Research and Development Institute, Agency for Defense Development)
Choi, Jae-Yong (The 6th Research and Development Institute, Agency for Defense Development)
Kang, Dong-Seok (The 6th Research and Development Institute, Agency for Defense Development)
Son, Kweon (The 6th Research and Development Institute, Agency for Defense Development)
Lee, Phil-ho (The 6th Research and Development Institute, Agency for Defense Development)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.20, no.3, 2017 , pp. 369-375 More about this Journal
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.
Keywords
Underwater Channel; TDOA; Spatial Correlation Coefficient; Direction Finding; Closest Point of Approach(CPA);
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