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.
出处
《电子工程师》
2005年第8期32-35,共4页
Electronic Engineer
关键词
信道估计
正交频分复用
LS
LMMSE
channel estimation, orthogonal frequency division multiplexing, IS, LMMSE