基于空时处理的水声扩频通信  

Underwater Acoustic Spread Spectrum Communications Based on Space-Time Cluster Processing

作　　者：周锋 张文博[1,2,3] 张宝胜[1,2,3] 聂东虎 王洋[1,2,3] 刘兵 ZHOU Feng;ZHANG Wenbo;ZHANG Baosheng;NIE Donghu;WANG Yang;LIU Bing(Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Marine Information Acquisition and Security(Harbin Engineering University),Ministry of Industry and Information Technology,Harbin 150001,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学水声技术重点实验室,哈尔滨150001 [2]海洋信息获取与安全工信部重点实验室(哈尔滨工程大学),哈尔滨150001 [3]哈尔滨工程大学水声工程学院,哈尔滨150001

出　　处：《电子与信息学报》2022年第6期2006-2013,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(11974090)。

摘　　要：由于海洋干扰严重,水声通信十分困难。扩频通信技术具有良好的抗干扰性能,能够保证在复杂的海洋环境中进行可靠的通信,常被用于水声通信中。水声信道是典型的相干多径信道。沿不同路径到达的信号具有不同的传播时延和到达角,因此接收信号具有时空特性。即接收信号具有时延扩展和角度扩展。多径信号的相干叠加导致接收信号中存在严重的符号间干扰。为了充分利用水声信号的时空聚类特性,该文设计了一个空时处理器,分别对沿每条路径到达的信号进行滤波。结合时空簇的多样性,可以有效提高通信系统的可靠性。提出了一种基于空时聚类处理的水声扩频通信方案。并在仿真和实验中对该通信方案进行了比较和分析,以验证其性能优势。Due to the serious interference in the ocean,underwater acoustic communications are very difficult.Spread spectrum communication technology has good anti-interference performance,and it can ensure reliable communications in complex marine environment,it is often used in underwater acoustic communications.Underwater acoustic channels are typical coherent multipath channels.The signals arriving along different paths have different propagation delays and angles of arrival,so received signals have space-time clustering characteristic.That is,received signals have time delay spread and angle spread.The coherent superposition of multipath signals leads to serious inter symbol interference in received signals.In order to take advantage of the space-time clustering characteristic of the underwater acoustic signals,a space-time processor is designed to filter the signals arriving along each path respectively.The reliability of the communication system can be effectively improved by combining the diversity of space-time clusters.An underwater acoustic spread spectrum communication scheme is proposed based on space-time cluster processing.This communication scheme is compared and analyzed in the simulation and the experiment,to verify its performance advantages.

关 键 词：水下通信 扩频通信 阵列信号处理 

分 类 号：TN929.3[电子电信—通信与信息系统] TN914.42[电子电信—信息与通信工程]