基于导频的OFDM信道估计算法的比较与分析  

Research and Analysis on the Pilot-aided OFDM Channel Estimation

作　　者：蒋琦[1] 刘洋[1] 王家恒[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏省南京市210096

出　　处：《电子工程师》2005年第8期32-35,共4页Electronic Engineer

摘　　要：OFDM(正交频分复用)作为一种频谱利用率较高的技术,越来越受到人们的关注。介绍了基于导频的OFDM信道估计的基本算法,主要研究了梳状导频插入的LS(最小平方误差)算法和块状导频插入的LMMSE(线性最小均方误差)算法,对各种方法的性能、适用性和复杂度进行了分析,并在此基础上提出了进一步的研究方向。As a technology offering high spectral efficiency, orthogonal frequency division multiplexing （OFDM） draws more people＇s attention. This paper presents various pilot-aided channel estimation methods of the OFDM systems and mainly focuses on the channel estimation based on comb-type pilot assignment and block-type pilot assignment. The performance, application and complexity of the different methods are compared. Based on the sutdies, a direction for the advanced research is proposed in conclusion of the paper.

关 键 词：信道估计 正交频分复用 LS LMMSE 

分 类 号：TN911.2[电子电信—通信与信息系统]