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Cancellation of dolphin sonar clicks in a communication signal based on adaptive time reversal processing
Donghyeon Kim1, J S Kim2, Jiyoung Song2
1Department of Convergence Study on the Ocean Science and Technoloty, Korea Maritime and Ocean University, Busan 49112, Korea.
Abstract:
In long-range underwater communication, conventional time reversal processing (CTRP) is used to mitigate the distortion caused by multipath and temporal spreading. However, signals produced by marine animals can contaminate communication signals. Impulsive signals, such as dolphin sonar clicks, have wide bandwidths and short pulse durations, making it difficult to isolate the communication signal. This letter proposes a method to cancel these sounds by estimating the Green's function of marine animal clicks and applying adaptive time reversal processing (ATRP). The effectiveness of the click nulling was verified by comparing the performances of CTRP and ATRP with seagoing experimental data.
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