基于自适应时间反转处理的海豚声纳信号中咔哒声的消除。

Cancellation of dolphin sonar clicks in a communication signal based on adaptive time reversal processing.

机构信息

Department of Convergence Study on the Ocean Science and Technoloty, Korea Maritime and Ocean University, Busan 49112, Korea.

Department of Ocean Engineering, Korea Maritime and Ocean University, Busan 49112, Korea

出版信息

JASA Express Lett. 2022 May;2(5):056001. doi: 10.1121/10.0010375.

DOI:10.1121/10.0010375

PMID:36154075

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.

摘要

在远程水下通信中，传统的时间反转处理（CTRP）用于减轻多径和时间扩展引起的失真。然而，海洋动物产生的信号会污染通信信号。脉冲信号，如海豚声纳点击，具有较宽的带宽和较短的脉冲持续时间，因此难以隔离通信信号。本信提出了一种通过估计海洋动物点击的格林函数并应用自适应时间反转处理（ATRP）来消除这些声音的方法。通过与航海实验数据比较，验证了 CTRP 和 ATRP 的性能，从而验证了点击消除的有效性。