Automatic detection of whale contact calls in background of ship-radiated noise

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Journal of Vibration and Shock ›› 2017, Vol. 36 ›› Issue (11) : 147-153.

LI Dawei 1,2 YANG Rijie 1 HAN Jianhui 1 GONG Jianwen 1

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Abstract

Some whale contact calls have been the interference of ship-radiated noise collected by passive sonar for their frequency bands overlapping. Therefore, that whale calls should be detected and eliminated to improve the further target autonomous recognition. So, in this paper, a two-stage whale calls detection algorithm is proposed, in which, in the first stage, the whale calls is modeled by polynomial phase signals and the ship-radiated noise is modeled by locally stationary Gaussian random process after prewhitening based on its frequency stability and then the whale contact calls are detected using the generalized likelihood ratio test calculating on a bank of match filters. The experiment results benchmarked on a large measured data show that the proposed method is available and can be used in various ship-radiated noise environments. The results of a further experiment comparing with another three methods show that the proposed method is outperformed the other three methods and can achieve a good whale calls detection result in a low false alarm.

Key words

whale contact calls / ship-radiated noise / Polynomial-phase signals / prewhitening process / generalized likelihood ratio test；

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LI Dawei 1,2 YANG Rijie 1 HAN Jianhui 1 GONG Jianwen 1. Automatic detection of whale contact calls in background of ship-radiated noise[J]. Journal of Vibration and Shock, 2017, 36(11): 147-153

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