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http://dx.doi.org/10.7776/ASK.2017.36.4.229

Auto tonal detection method robust to interference for passive sonar  

Kang, Tae-Su (Maritime R&D Lab, LIGNex1)
Kim, Dong Gwan (LIG넥스원 해양연구소)
Choi, Chang-Ho (LIG넥스원 해양연구소)
Abstract
In this paper we propose an auto tonal detection method which exploits short term stationary when targets located in a detection beam area and then additional methods are proposed in order to reduce the computational complexity of the proposed method. The proposed method is adaptive to input signals and robust against interference caused by multiple targets because it compares an expected value of input signals with a threshold value which are estimated from a single beam while signals are keep stationary. The performances of the proposed methods are evaluated using by simulated data and acquired data from real ocean. The proposed method has shown better performance than conventional CFAR (Constant False Alarm Rate) methods.
Keywords
Passive sonar; Tonal detection; Narrowband auto detection; Adaptive threshold;
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