FSE在水声微多径信道条件下应用的实验验证  

Experimental studies on the application of FSE in micro-multi-path underwater acoustic communication system

作　　者：刘巧林[1] 李斌[1] 雷亚龙[1] 

机构地区：[1]西北工业大学航海学院,西安710072

出　　处：《国外电子测量技术》2010年第4期68-70,77,共4页Foreign Electronic Measurement Technology

摘　　要：水声信道特别是浅海水声信道中不仅存在着很强的多径现象,给水声通信带来很严重的码间干扰(Inter-symbol interference),而且各多径分量到达时间差远远小于一个码元宽度,这种多径现象造成了很强的码内干扰(intra-symbol interference),码间干扰和码内干扰严重影响了水声通信的性能。而分数间隔均衡器(fractionally spaced equalizer,FSE)对克服码间干扰尤其是克服码内干扰效果很好。本文根据水声实验,创新的将实验中遇到的多径时延差小于一个码元宽度的多径现象,定义为微多径现象,并从理论分析和实验验证两个角度阐述了水声通信中分数间隔均衡器(FSE)应用的重要性,得出分数间隔均衡器具有很强的工程应用价值。An underwater acoustic channel,especially a shallow water channel,is often corrupted by inter-symbol interference caused by strong multi-path phenomena and intra-symbol interference caused by micro-multi-path phenomena, which seriously affect the underwater acoustic communication quality.Fractionally spaced equalizer（FSE）is remarkable in the way to overcome the Inter-symbol interference and Intra-symbol interference.In this paper,a innovative concept of micro-multi-path phenomena is encountered and the importance of applying fractionally spaced equalizer in underwater acoustic communication is demonstrated from two perspectives,the simple theoretical analysis and experimental verification, both showing FSE is valuable in project.

关 键 词：水声通信 多径 码间干扰 码内干扰 微多径 分数间隔均衡器 

分 类 号：TN911.5[电子电信—通信与信息系统]