水下舰艇扩频通信体制研究  

Research on spread spectrum communication system of underwater vessels

作　　者：李尧[1] 赵健康[1] 龙海辉[1] LI Yao;ZHAO Jiankang;LONG Haihui(School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《现代电子技术》2025年第1期107-111,共5页Modern Electronics Technique

基　　金：上海商用飞机系统工程联合研究基金(CASEF-2022-MQ01)。

摘　　要：水下舰艇通信采用的水声通信方式在长距离传输中信号衰减严重,且因为隐蔽性需求信号功率受限,叠加受到多径干扰和海洋背景噪声干扰,通信误码率较高。为此,提出水下舰艇扩频通信体制研究。设计扩频通信体制,利用扩频通信体制拓宽传输带宽,提升远距离衰减下的通信信噪比;采用类白噪声的伪随机码m序列和OPS序列作为扩频码组建编码序列集,解决白噪声干扰、多径干扰和码分多址的问题。测试结果表明:同等条件下,采用m序列的扩频通信结果更优,可以实现-25 dB下误码率低于1%的可靠通信。经过该方法调制后,剔除了噪声干扰和多径干扰,增强了衰减的高频信号,解决了水下通信远距离衰减、多径干扰、背景噪声干扰等问题。The underwater acoustic communication method used for communication on underwater vessels is confronted with severe signal attenuation in long-distance transmission,and due to the requirement of concealment,the signal power is limited and is affected by multipath interference and ocean background noise interference in a superposition manner,resulting in high communication error rate.Therefore,this article proposes the study of underwater vessel spread spectrum communication system.A spread spectrum communication system is designed,and the spread spectrum communication system is utilized to expand transmission bandwidth,so as to improve communication signal-to-noise ratio(SNR)under long-distance attenuation.Pseudo-random code m-sequences and OPS sequences similar to white noise are used as spreading codes to construct an encoding sequence set,so as to get rid of white noise interference,multipath interference and code division multiple access(CDMA).The test results show that under the same conditions,the spread spectrum communication using m-sequences yields better results and can achieve reliable communication with an error rate below 1%at-25 dB.After the modulation with the proposed method,noise interference and multipath interference are eliminated,and the attenuated high-frequency signal is enhanced,so the problems of long-distance attenuation,multipath interference and background noise interference in underwater communication are eliminated.

关 键 词：水下舰艇通信 扩频通信 M序列 OPS序列 误码率 信噪比 

分 类 号：TN929.3-34[电子电信—通信与信息系统]