基于置零干扰抵消的水声移动多用户通信技术  

Underwater acoustic mobile multi-user communication technology based on hyperspace cancellation by coordinate zeroing algorithm

作　　者：张居成 邓锦豪 刘衍超 史铭 洪小平 ZHANG Jucheng;DENG Jinhao;LIU Yanchao;SHI Ming;HONG Xiaoping(Qingdao Deep-trans Information&Technology Co.,LTD,Qingdao 266000,Shandong,China;College of Underwater Acoustic Engineering,Harbin Engineering University,Harbin 150001,Heilongjiang,China;Qingdao Innovation and Development Base,Harbin Engineering University,Qingdao 266000,Shandong,China)

机构地区：[1]青岛眀深信息技术有限责任公司,山东青岛266000 [2]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001 [3]哈尔滨工程大学青岛创新发展基地,山东青岛266000

出　　处：《声学技术》2024年第5期628-635,共8页Technical Acoustics

基　　金：哈尔滨工程大学青岛创新发展基地青年科学家培育基金项目(79000012/012)。

摘　　要：文章对变换域置零干扰抵消算法进行了改进,使其适用于水声移动多用户通信系统,并将置零干扰抵消算法与多通道合并技术相结合,通过引入空间处理增益进一步克服多用户通信系统中的多址干扰。仿真结果表明,该算法在2用户场景,信干比为-10 dB的条件下,能够有效克服干扰用户的干扰,在误码率达到10^(-4)时,其性能曲线与无干扰情况下接收性能曲线相差1 dB左右,与传统串行干扰抵消算法相比,改进后的置零干扰抵消算法在水声移动场景下表现更佳。经过湖试数据测试,在3用户系统中,利用改进后的置零干扰抵消算法使多址干扰得到了有效抑制,期望用户的输出信噪比较处理前提高了约8 dB,证明了该算法的有效性。In this paper,the hyperspace cancellation by coordinate zeroing(HCC0)algorithm is improved to make it suitable for underwater acoustic mobile multi-user communication systems.The improved HCC0 algorithm combines multi-channel processing and introduces spatial gain to further overcome the multiple access interference(MAI)in multi-user communication systems.Simulation results demonstrate that the proposed algorithm can effectively overcome the interferences from the interfering user in the two user scenario at the signal to interference ratio(SIR)of-10 dB.When the bit error rate reaches 10^(-4),the performance loss is around 1 dB compared with a single user without interference.Compared with the traditional successive interference cancellation(SIC)algorithm,the improved HCC0 algorithm performs better in underwater acoustic moving scenes.The lake test data show that MAI is effectively suppressed by using the improved HCC0 algorithm when the desired user is interfered by two other users at different speeds,and the output signal to noise ratio(SNR)of the desired user is about 8 dB higher than the original data,which proves the effectiveness of the algorithm.

关 键 词：水声通信 码分复用 空时处理 多用户检测 

分 类 号：TN929.3[电子电信—通信与信息系统]