水下声传感器网络联合同步和定位方法  

Joint clock synchronization and localization method for underwater acoustic sensor networks

作　　者：邱枫 仓乃梦 QIU Feng;CANG Naimeng(TJ-YZ School of Network Science,Haikou University of Economics,Haikou 570228,China;School of Information and Communication Engineering,Hainan University,Haikou 570228,China)

机构地区：[1]海口经济学院腾竞依智网络学院,海南海口570228 [2]海南大学信息与通信工程学院,海南海口570228

出　　处：《现代电子技术》2024年第9期66-70,共5页Modern Electronics Technique

基　　金：海南省自然科学基金青年基金项目(620QN284)。

摘　　要：水下传感器网络(UASNs)在海洋监测、资源勘探、灾害预防和海洋学数据收集等方面的广泛应用,引起了学术和工业研究人员的极大关注。在这些服务中,节点的准确定位是水下声传感器网络的研究重点之一。然而,在实际的水下环境中,传播速度随深度变化(即分层效应)和异步时钟的存在均会显著影响测距的精度,从而降低定位性能。针对以上特性,文中设计一种基于自主水下航行器(AUV)辅助的水下声传感器网络联合同步和定位方法。在开始定位流程后,目标节点通过接收AUV发出的信标信号建立水声传播方程并进行相对距离的估计,其中考虑了异步时钟问题和分层效应引起的水声弯曲效应问题,实现了对目标节点位置和时钟的联合估计。仿真结果验证了所提方法的有效性和可行性。Underwater acoustic sensor networks(UASNs)have gained considerable attention from academic and industrial researchers thanks to their wide range applications in ocean monitoring,resource exploration,disaster prevention and oceanography data collection.In the services,the accurate node localization is one fundamental issue in the study of UASNs.However,in the actual underwater environment,the existence of propagation speed variation with depth(i.e.,stratification effect)and asynchronous clock affects the ranging accuracy obviously,and in turn decreases the localization performance.In view of the above characteristics,an autonomous underwater vehicle(AUV)aided joint synchronization and localization method for UASNs is designed.After starting the localization process,the target node establishes the underwater acoustic propagation equation by receiving the beacon signals transmitted by the AUV,and estimates the relative distance,in which the asynchronous clock and ray bending caused by the stratification effect are considered,so as to realize the jointly estimation of localization and clock synchronization of the target node.The simulation results verify the effectiveness and feasibility of the proposed method.

关 键 词：自主水下航行器(AUV) 时钟同步 水下声传感器网络 测距精度 分层效应 联合同步和定位方法 

分 类 号：TN911.7-34[电子电信—通信与信息系统] TP393[电子电信—信息与通信工程]