OFDM系统中基于梳状导频的空时信道估计  

Space-time Channel Estimation for OFDM Systems Based on Comb-type Pilot Arrangement

作　　者：万琦[1] 李平安[1] 

机构地区：[1]武汉理工大学信息工程学院,湖北武汉430070

出　　处：《武汉理工大学学报（信息与管理工程版）》2006年第11期20-23,共4页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：湖北省自然科学基金资助项目(2005ABA224)

摘　　要：研究了OFDM系统中基于梳状导频的空时信道估计方法,并提出了一种新的信道估计算法,即实现了空时二维信道估计。基于梳状导频的空时信道估计的算法分为两步:第一步是利用导频信号对导频位置的信道进行估计;第二步是信道插值,得到所有频域位置的信道信息。基于LS准则的信号估计以及基于线性插值的信道插值,笔者进行了详细研究。The channel estimation methods for OFDM systems based on comb - type pilot sub - carrier arrangement are investigated, and a new method for estimating channel transfer function is proposed to estimate the channel transfer function from time and space. The channel estimation algorithm based on comb - type pilots is divided into pilot signal estimation and channel interpolation. The pilot signal estimation based on LS together with channel interpolation based on linear interpolation is studied.

关 键 词：OFDM 梳状导频 空时 信道估计 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]