双向干扰抑制的多用户滤波多音水声通信研究  

Bidirectional interference suppression for multiuser filtered multitone acoustic communications

作　　者：孙琳[1,2] 李海森[1,3,4] 李羿萱[5] SUN Lin;LI Haisen;LI Yixuan(College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,China;School of Cyber Science and Engineering,Qufu Normal University,Qufu 273165,Shandong China;Acoustic Science and Technology Laboratory,Harbin Engineering University,Harbin 150001,China;Key Laboratory of Marine Information Acquisition and Security,Harbin Engineering University,Harbin 150001,China;Shanghai Marine Electronic Equipment Research Institute,Shanghai 201206,China)

机构地区：[1]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001 [2]曲阜师范大学网络空间安全学院,山东曲阜273165 [3]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001 [4]哈尔滨工程大学海洋信息获取与安全工信部重点实验室,黑龙江哈尔滨150001 [5]上海船舶电子设备研究所,上海201206

出　　处：《华中科技大学学报（自然科学版）》2023年第9期40-47,共8页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：山东省自然科学基金资助项目(ZR2021MD115);中国博士后基金资助项目(2017M621248).

摘　　要：为了进一步抑制多用户滤波多音(FMT)水声通信中的同道干扰和码间干扰,提出了双向干扰抑制的方法.采用双向并行的干扰抑制结构,前向结构用于处理FMT解调后的各子信号,反向结构用于处理各子信号的时间反转形式.前向和反向结构均采用时反技术进行预处理,采用干扰抵消和判决反馈均衡进行后处理,合并双向处理的结果就可以得到用户序列最终的判决值.分析了所提方法的原理,并基于实际的试验数据对所提方法的有效性展开了验证.结果表明:所提方法通过双向处理可以获得额外的分集增益,与传统的单向干扰抑制方法相比,多用户FMT水声通信采用所提方法处理后的误码率和输出均方误差更低,性能更优.To further suppress cochannel interference and intersymbol interference in multiuser filtered multitone(FMT)acoustic communications,a bidirectional interference suppression method was proposed.Two parallel structures for interference suppression were adopted,normal structure was used to deal with each output sub-signal of FMT demodulation and backward structure was used to process the time reversed version of each sub-signal.In normal and backward parallel structures,time reversal technique was used as preprocessing,successive interference cancellation and decision feedback equalization were used as postprocessing,final decision of each user sequence can be obtained by combining the outputs of two parallel processes.The principle of the proposed method was described in detail,and the data collected in an actual experiment was used to verify the validity of the method.The results show that compared with traditional one-way interference suppression methods,the proposed method benefits from the diversity gain achieved by bidirectional processing,which can further reduce symbol error rate and output mean square error in the multiuser FMT acoustic communication,and achieve better performance.

关 键 词：多用户水声通信 滤波多音 双向干扰抑制 时反 干扰抵消 判决反馈均衡 

分 类 号：TN929.3[电子电信—通信与信息系统]