水声通信系统基于分布式的导频放置  

Distributed Pilot Pattern for Underwater Acoustic Communication System

作　　者：顾晨[1] 孟庆功[1] 束锋[1,2,3] 王进[1] 徐彦青[1] 钱振宇[1] 未元[1] 陆锦辉[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094 [2]东南大学移动通信国家重点实验室,南京210096 [3]南京理工大学近程高速目标探测技术国防重点学科实验室,南京210094

出　　处：《电子器件》2016年第1期144-147,共4页Chinese Journal of Electron Devices

基　　金：国家自然基金项目(61271230;61472190);中央高校基本科研业务费专项资金项目(30920130122004);东南大学移动通信国家重点实验室开放课题项目(2013D02)

摘　　要：针对基于正交频分复用水声通信系统的频率选择性信道,传统的导频放置方式不能获取较好的信道估计性能,提出了一种分布式导频放置方式,该方法通过设定相邻导频符号的间距大于信道相关带宽,从而来减小信道的频率响应波谷对信道估计性能的影响。仿真结果表明:提出的分布式导频放置方式较传统的等间距和集中式导频放置方式具有更优的性能。In frequency-selective underwater acoustic channel based on orthogonal frequency division multiplexing （OFDM）,conventional pilot pattern cannot achieve a better channel estimation performance. To avoid this poor situ-ation,we proposed a random distributed pilot pattern,this pattern effectively reduces the frequency selective fading impact by placing pilot symbols such that distance between any two adjacent pilot symbol being larger than or equal to coherent bandwidth. From our simulation results,we find the proposed distributed pilot pattern has a better bit er-ror rate performance compared to conventional equi-spaced and consecutive patterns.

关 键 词：海底水声信道 正交频分复用 频率选择性衰落 导频放置方式 误码率(BER) 

分 类 号：TN912.16[电子电信—通信与信息系统] TN929.3[电子电信—信息与通信工程]