一种低复杂度的正交频分复用水声信道估计方法  

Low-complexity channel estimation in high speed OFDM underwater acoustic communication

作　　者：邓红超[1] 蔡惠智[1] 胡捍英[2] 

机构地区：[1]中国科学院声学研究所,北京100080 [2]解放军信息工程大学通信工程系,郑州450002

出　　处：《声学技术》2006年第5期393-396,共4页Technical Acoustics

基　　金：国家"863"基金(863-818-09-09);"十五"国防预研基金(10106050302)项目

摘　　要：高可靠性、低复杂度的信道估计是实现正交频分复用(OFDM)数据通信的必要前提。由于水声信道是时间、频率高度散射的信道,传统的基于维纳滤波的信道估计复杂度过高,参考无线信道的广义平稳非相关散射(WSSUS)模型,本文提出了一种基于最小均方误差(MMSE)准则的低复杂度OFDM水声信道估计方案,其运算复杂度明显降低,并被实际实验证明是可行、有效的。Underwater acoustic environment is a particularly hostile communication channel with severe time and frequency selectivity. In order to achieve reliable OFDM communications, reliable and low-complexity channel estimation is necessary. However conventional estimate schemes based on Winner filter are complicated. This paper proposes a low-complexity channel estimation using minimum mean-squared error （MMSE） principle under the assumption of underwater acoustic wide-sense stationary uncorrelated scattering （WSSUS） channel model. The computational complexity is much lower. It is applicable in practical lake experiments.

关 键 词：水声通信 正交频分复用 信道估计 广义平稳非相关散射 

分 类 号：TN929.3[电子电信—通信与信息系统]