基于导频的OFDM信道估计方法及分析  

Methods and Analysis of OFDM Channel Estimation Based on Pilot Frequency

作　　者：顾礼荣[1] 赵姚同[1] 

机构地区：[1]上海交通大学卫星通信研究所,上海200030

出　　处：《电视技术》2004年第2期7-8,12,共3页Video Engineering

摘　　要：对OFDM系统中基于导频的信道估值器进行了比较分析,分析了DVB-T系统中导频的分布,在DVB-T系统基础上结合最大似然准则和最小均方误差准则,提出了信道估计的方法,并在Reyleigh信道模型下,运用Matlab实现仿真。Comparative analysis is made for channel estimator based on pilot frequency in OFDM system, and the distribution of pilot frequencies in DVB-T system is analysed. Methods for channel estimation are proposed on the basis of DVB-T system in combination with maximum likelyhood and minimum mean square error. Simulation is realized on the basis of Matlab and Reyleigh channel model.

关 键 词：OFDM 地面数字电视广播 正交频分复用 信道估计 最大似然估计 最小均方误差估计 

分 类 号：TN949.197[电子电信—信号与信息处理]