摘要
为构建海洋浅表层与近底层间的高效跨层通信系统,本文基于南海中沙海域非完全深海声道环境下的全海深声传播实验数据,探究了可靠声路径区域在不同声源深度、接收深度和传播距离条件下的信道特性及其物理形成机制。结果表明:当声源深度位于海底附近共轭深度对应的声速层时,可实现类似完全深海声道的远距离直达声传播;可靠声路径区域信道呈现明显的分簇稀疏特征,且不同簇之间具有显著的时变性差异;信道多径时延随接收深度和传播距离的增加呈减小趋势;此外,较浅声源深度对应的信道结构更为简单,有利于通信系统优化。本研究不仅揭示了非完全深海声道环境下跨层声传播的物理机制,同时为中沙海域可靠声路径区水声通信系统的设计与性能优化提供了实验依据和理论参考。
To establish an efficient cross-layer communication system between the ocean's near-surface and near-bottom layers,this paper systematically investigates the channel characteristics of the reliable acoustic path region under varying source depths,receiver depths,and propagation distances,based on full-depth acoustic propagation experimental data in the non-fully developed deep-sea sound channel environment of the Zhongsha region in the South China Sea.Furthermore,the underlying physical mechanisms are thoroughly analyzed.The results revealed the following:Long-distance direct sound propagation similar to that under the completely deep-sea sound channel can be realized when the sound velocity at the sound source depth has a conjugate depth near the seafloor.The channel in the RAP zone exhibits a clear split-cluster sparsity characteristic,and there is a notable difference in the time variability between different clusters.The multipath delay of the channel in the direct-arrival zone decreases with an increase in the receiving depth and the receiving distance.Moreover,experimental results showed that in the RAP zone,shallower source depths correspond to simpler channel structures.This study not only reveals the physical mechanism of cross-layer sound propagation in the noncomplete deep-sea sound channel environment but also provides an experimental basis and a theoretical reference for the design and performance optimization of the underwater acoustic communication system in the RAP zone of the Zhongsha waters.
作者
殷敬伟
李伟哲
韩笑
魏笠
YIN Jingwei;LI Weizhe;HAN Xiao;WEI Li(National Key Laboratory of Underwater Acoustic Technology,Harbin Engineering University,Harbin 150001,China;Key Laboratory for Polar Acoustics and Application of Ministry of Education(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China;Qingdao Innovation and Development Center of Harbin Engineering University,Qingdao 266400,China)
出处
《哈尔滨工程大学学报》
北大核心
2025年第8期1475-1484,共10页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(62422107,62125104)
黑龙江省自然科学基金优秀青年基金项目(YQ2022F001)
哈尔滨工程大学博士研究生校长创新基金.
关键词
可靠声路径
中沙海域
深海
水声信道
声传播
直达声区域
多径特性
信道时变性
reliable acoustic path
zhongsha sea area
deep-sea
underwater acoustic channe
sound propagation
direct sound zone
multipath characteristics
channel time-varying characteristics
作者简介
殷敬伟,男,教授,博士生导师;通信作者:韩笑,男,教授,博士生导师,E-mail:hanxiao1322@hrbeu.edu.cn.
