基于双编码策略的水声OFDM通信算法  

Underwater acoustic OFDM communication algorithm based on dual encoding strategy

作　　者：邢延超 秦正昌 丁寒雪 王言前 李泽群 王辛杰 XING Yan-chao;QIN Zheng-chang;DING Han-xue;WANG Yan-qian;LI Ze-qun;WANG Xin-jie(School of Information and Control Engineering,Qingdao University of Technology,Qingdao 266000,China;Electrical and Electronic Engineering,University of Technology,Sydney 2007,Australia)

机构地区：[1]青岛理工大学信息与控制工程学院,山东青岛266000 [2]Electrical and Electronic Engineering,University of Technology,Sydney 2007,Australia

出　　处：《舰船科学技术》2021年第15期135-139,共5页Ship Science and Technology

基　　金：国家自然科学基金资助项目(61771271);山东省高等学校科学技术计划项目(J18KA315);青岛市应用基础研究计划项目青年专项(19-6-2-4-cg)。

摘　　要：针对船舶噪声和时变多途干扰问题,提出基于双编码策略的水声正交频分复用(DE-OFDM)通信算法。基于信道卷积编码的冗余和记忆特性,将信息比特数量提升多倍,进行约束,得到编码比特,提高通信系统抗船舶噪声和时变多途干扰性能;提出差分编码技术,构建参考相位,利用相邻相位差值进行符号编码,有效消除船舶噪声和时变多途干扰;基于循环前缀技术和OFDM通信技术抗多途特性,有效消除时变多途干扰。进行仿真和100组水箱时变且含船舶噪声信道下的试验,试验结果验证了所提算法的有效性。In order to solve the problem of ship noise and time-varying multipath interference,an underwater acoustic orthogonal frequency division multiplexing communication algorithm based on dual encoding strategy(DE-OFDM)is proposed.Based on the redundancy and memory characteristics of the channel convolutional coding,the number of information bits is increased by multiple times,the constraints are obtained,and the coded bits are obtained to improve the performance of the communication system against ship noise and time-varying multipath interference.The differential coding technology is proposed,the reference phase is constructed,and the sign coding is carried out by using the difference of adjacent phases,which can effectively eliminate the ship noise and time-varying multipath interference.Based on the cyclic prefix technology and OFDM communication technology,it can effectively eliminate the time-varying multipath interference.Simulation and experiments were carried out 100 groups under the channel of water tank with time-varying and ship noise.Good experimental results demonstrate the effectiveness of the proposed algorithm.

关 键 词：船舶噪声 时变多途干扰 信道编码 差分编码 OFDM算法 

分 类 号：TN929.3[电子电信—通信与信息系统]