基于VBLAST的水声MIMO高速通信技术研究  

Research on VBLAST based underwater MIMO high speed communication technique

作　　者：姜煜[1] 白兴宇[1] 

机构地区：[1]杭州应用声学研究所声纳技术国家级重点实验室,杭州310012

出　　处：《声学技术》2011年第4期345-349,共5页Technical Acoustics

摘　　要：为实现高速水下通信,提出了一种基于VBLAST(贝尔实验室垂直分层空时)编码的水声MIMO(多输入多输出)通信技术。该技术通过在发射端和接收端同时采用多个阵元进行多发多收,借助空间复用,可有效解决水下通信系统带宽资源缺乏的难题,使系统在不增加带宽的条件下成倍提高数据传输速率。在水声MIMO通信系统的接收端,提出采用带有二阶数字锁相环、基于自适应空时判决反馈均衡的相干解调技术。该技术可有效克服水声MIMO信道中的多径干扰及同频干扰,且能自适应跟踪信道变化。仿真及湖试结果证明了所提水声MIMO高速通信技术的良好性能。The underwater acoustic MIMO communication technique based on VBLAST code is proposed to obtain high data rate.The technique can realize spatial multiplexing with multiple transmitters and receivers simultaneously to greatly increase data rate without increasing the system bandwidth.Robust coherent demodulation technique based on space-time adaptive decision-feedback equalization is proposed.The technique can efficiently suppress multi-path in-terference,co-channel interference and rapid phase fluctuation of MIMO channel.In addition,it can track the variable channel adaptively.Good performance is demonstrated by both simulation and lake trial results.

关 键 词：高速水下通信 垂直分层空时编码 多输入多输出 自适应空时判决反馈均衡 

分 类 号：TN913[电子电信—通信与信息系统]