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http://dx.doi.org/10.6109/jkiice.2017.21.10.1973

Autofocus Phase Compensation of Velocity Disturbed UUV by DPC Processing with Multiple-Receiver  

Kim, Boo-il (Department of Electrical, Electronics and Software Engineering, Pukyong National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.21, no.10, 2017 , pp. 1973-1980 More about this Journal
Abstract
In the case of a small UUV operating an active synthetic aperture sonar, various velocity disturbances may occur on the path due to the influence of external underwater environment, and this causes phase errors in coherent synthetic aperture processing, which has a large influence on the detected image. In this paper, when a periodic sinusoidal velocity disturbance is generated in the traveling direction, the phase generated by the round trip slope range at each position is estimated the cross correlation coefficient for multiple received signals and compensated the position variation in the overlapped DPC by the average value within the maximum allowable width. Through simulations, it has been confirmed that the images degraded by the velocity disturbance amplitude and fluctuating frequency of the UUV are removed from the false targets and the performance of azimuth resolution is improved by the proposed phase compensation method.
Keywords
UUV(Unmanned Underwater Vehicle); Active Synthetic Aperture Sonar; Displaced Phase Center(DPC); Velocity Disturbance; Phase Compensation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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