OFDM系统在动态环境下的自适应信道估计  

Adaptive Channel Estimation for Mobile OFDM Systems

作　　者：白阳[1] 葛建华[1] 韩良冬[1] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,陕西西安710071

出　　处：《电视技术》2006年第2期34-37,共4页Video Engineering

摘　　要：分析了OFDM通信系统信道估计采用二维自适应维纳滤波的情形,信道估计根据对不同的信道环境(多径时延,多普勒频移)的实时检测,自适应地选择适宜的滤波参数,动态地跟踪信道的变化特征。仿真分析得到了最优的滤波参数并且证明了在非完全匹配条件下的插值亦有很好的效果。In this paper we investigate adaptive two dimensional （2D） Wiener filtering for channel estimation in OFDM based communication systems. An estimation of the users current speed and multipath spread has been done currently for varied channel environment. According to the result, we will adaptively select one of the prestored Wiener filters in each time and frequency direction for channel estimation. Extensive simulations have been performed to determine the best choice of filterset and to investigate the effects of mismatch to channel state.

关 键 词：正交频分复用 二维维纳滤波 信道估计 DVB-T标准 数字音频广播 

分 类 号：TN911.23[电子电信—通信与信息系统]