基于TR-STBC的MIMO水声通信方法  

Multi-input-multi-output acoustic communications using time-reversal space-time block coding

作　　者：孙琳[1,2] 李海森[1,2] 董照琦 邹博[1,2] 

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]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2016年第3期355-359,367,共6页Journal of Harbin Engineering University

基　　金：中国高等学校博士学科点专项科研基金资助项目(20112304130003)

摘　　要：针对水下小尺度接收平台通过仅使用接收分集的被动时反水声通信方法,获得的空间处理能力弱、通信性能较差的问题,提出了时反空时分组编码(TR-STBC)多输入多输出(MIMO)水声通信方法。根据正交空时分组编码的原理,设计了码率为1/2的TR-STBC方案,所提方法利用该编码方案可以实现发射分集,从而提高系统的空间处理性能,进而降低误码率和后处理所用自适应均衡器的复杂度。仿真和试验结果表明:与仅使用接收分集的被动时反水声通信方法相比,所提方法性能更优,并且当发射阵元数固定、阵元间距与信道的垂直相关长度相等时,所提方法能获得最佳的空间处理性能。A multi-input-multi-output（ MIMO） acoustic communication method using time-reversal space-time block coding（ TR-STBC） was proposed to solve the problem that small-scale receivers in shallow water have low spatial processing performance and poor communication performance when using the passive time reversal（ PTR） acoustic communication method,which employs receiver diversity alone. Through the 1 / 2 rate TR-STBC scheme,based on orthogonal space-time block coding,the proposed method uses transmitter diversity to improve spatial processing performance,and therefore,bit error rate（ BER） and the complexity of the adaptive equalizer for post-processing could be reduced. Simulation and experiment results show that the proposed method is superior to the PTR communication method using receiver diversity alone. The proposed method shows best spatial processing performance,when the number of transmitter elements remains constant and the spacing of the transmitter elements equals the vertical coherence length of channel.

关 键 词：水声通信 被动时反 时反空时分组编码 多输入多输出 自适应均衡 

分 类 号：TN929.3[电子电信—通信与信息系统]