一种基于二维导频的信道估计改进算法  

An Advanced Channel Estimation Method Based on Two-Dimensional Pilot

作　　者：李冰[1] 易波[1] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082

出　　处：《微处理机》2009年第1期78-80,83,共4页Microprocessors

摘　　要：针对充满噪声干扰和多径效应的无线信道环境,提出一种基于二维导频的信道估计改进算法。该算法采用二维导频设置图案,利用导频点处充分记录的信道信息,提取信道参数的最优初始估计。在此基础上,利用优化的LMMSE算法,修正初始信道估计中的估计误差。理论分析及仿真实验表明,在多径时变衰落信道下,改进后的信道估计方法有效提高了系统的估计性能。This paper investigates an advanced channel estimation method under the wireless environment with multipath and noise. And a novel two - dimensional pilot pattern is proposed which fully keeps the channel information, by which can we get the optimal initial estimation result of channel parameter. Based on the proposed method, a LMMSE algorithm is employed to revise the estimation error. Analysis and simulation result show that the novel channel estimation algorithm of this paper improves the estimate performance remarkably.

关 键 词：正交频分复用 信道估计 维纳滤波 导频图案 

分 类 号：TN929.5[电子电信—通信与信息系统]