基于混沌正交组合序列的M元码分多址水声通信  

M-ary code division multiple access underwater acoustic communication based on chaotic orthogonal combination sequence

作　　者：吕曜辉 杜鹏宇[3] 张宏滔[3] 朱小辉[3] 

机构地区：[1]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001 [2]中国科学院声学研究所,北京100190 [3]杭州应用声学研究所声纳技术重点实验室,浙江杭州310023

出　　处：《声学技术》2018年第1期32-37,共6页Technical Acoustics

基　　金：国家自然科学基金资助项目(61701449;61701450;61471137)

摘　　要：提出了M元能量检测器算法,该算法简单易实现,极大优化了M元码分多址系统接收机结构和解码运算量。同时,M元能量检测器具有抗载波相位跳变和抗水声信道多途干扰的能力。针对M元码分多址水声通信系统中所需扩频序列数量庞大、选码难度高的问题,提出了混沌正交组合序列,通过简单的迭代组合即可产生大量满足要求的扩频序列,而且同族的混沌正交组合序列间满足正交关系。海试试验成功实现了7个用户的M元码分多址水声通信试验(M=512),共采用了3 584条混沌正交组合序列,每个用户通信速率为70 bit.s-1,验证了算法的有效性,为网络化水声通信的应用提供了技术基础。An M-ary energy detector algorithm is proposed. The algorithm is simple and easy to implement, which greatly optimizes the receiver structure and decoding operation of the M-ary code division multiple access （CDMA） system. Also, the M-ary energy detector has the ability to resist carrier phase hopping and multi-channel interference in underwater acoustic channels. To solve the problem of selecting a large number of spreading sequences in M-ary CDMA underwater acoustic communication system, a chaotic orthogonal combination sequence is proposed in this paper, and a large number of spreading sequences satisfying the requirements can be generated through a simple combination of iterations. And, the orthogonal relationship exists between the chaotic orthogonal combination sequences of the same family. In January 2015, a sea trial successfully implemented the M-ary code CDMA Acoustic Communication Test （M=512） for 7 users with a total of 3 584 chaotic orthogonal combination sequences and a communication rate of 70 bit·s^-1, which verifies the validity of the proposed algorithm and provides a technical basis for the application of networked underwater acoustic communications.

关 键 词：水声通信 M元编码 码分多址 混沌正交组合序列 能量检测器 

分 类 号：TB567[交通运输工程—水声工程]