OFDM系统在时变多径信道中的信道估计技术  

A novel OFDM system channel estimation algorithm under time-varying multipath channel

作　　者：刘琛[1] 王霞[1] 

机构地区：[1]西安交通大学电子与信息学院,陕西西安710049

出　　处：《西安邮电学院学报》2010年第1期54-58,共5页Journal of Xi'an Institute of Posts and Telecommunications

摘　　要：提出了一种OFDM系统在时变多径信道中的信道估计算法。这种算法是将时变信道看作在一段时间内作线性变化的基础上,利用连续的两个OFDM信号帧内的导频信息,对信道的时变性进行估计。论文应用数值仿真的方法对这一算法进行了仿真分析。分析结果表明,与已有的OFDM系统在时变多径信道中的信道估计技术相比,所建议的算法可以有效地减小信道估计的误差。A channel estimation algorithm is proposed for OFDM wireless communication system under time-varying multipath channel.Based on considering the channel to be linear varying in a short period of time,the proposed algorithm estimates the time variety of the channel on account of pilot information in two consecutive OFDM frames.Math simulation is used to analyze the algorithm.The result shows that,compared with the existing channel estimation algorithms for OFDM system under time-vary multipath channel,the proposed algorithm can effectively reduce estimation errors.

关 键 词：时变多径信道 OFDM 载频间干扰 信道估计 

分 类 号：TN911.5[电子电信—通信与信息系统]