Fast Fading Channel Estimation for OFDM Systems with Complexity Reduction  

作　　者：ZHANG Chen LI Dan 

机构地区：[1]College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Journal of Electronics》2021年第6期1173-1177,共5页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61901487,No.61871384)。

摘　　要：Channel estimation plays a significant role in the Inter-carrier interference(ISI)mitigation and symbol detection in Orthogonal frequency division multiplexing(OFDM)systems.As the speed of mobile terminal increases,the channel changes rapidly,causing fast fading which will degrade the system performance.In this paper,a low complexity fast fading channel estimation method suited for scattered pilot OFDM systems is proposed.This method is characterized by estimating channel matrix directly in the frequency domain,which can significantly reduce the channel estimation complexity with good system performance.Simulation results verify its superiority over the existing estimation methods.

关 键 词：OFDM Fast fading channel Basis expansion model 

分 类 号：TN929.53[电子电信—通信与信息系统]