An Effective Approach to Estimate the Second-Order Polynomial Models in Time-Varying Channels  

作　　者：HUANG Min LI Bingbing SUN Ruqin 

机构地区：[1]The State Key Laboratory of Integrated Service Networks, Xidian University [2]The Institute of Multi-dimensional Signal Processing, College of Information Engineering, Shenzhen University

出　　处：《Chinese Journal of Electronics》2017年第1期199-204,共6页电子学报（英文版）

基　　金：supported by the 111 Project(No.B08038);the National Natural Science Foundation of China(No.61501348,No.61271299,No.U1501253);the Natural Science Basic Research Plan in Shaanxi Province of China(No.2016JQ6039);the Natural Science Foundation of Guangdong Province(No.2015A030311030);the Science and Technology Innovation Commission of Shenzhen(No.JCYJ20150324140036835,No.ZDSYS201507081625213,No.KC2015ZDYF0023A)

摘　　要：This paper deals with an efficient method for channel estimation in Orthogonal frequency-division multiplexing(OFDM) systems. The channels are assumed to be Time-varying(TV) and approximated by a Secondorder polynomial(SOP) model. Increasing the polynomial order reduces the model error, but requires more polynomial estimation time. In order to circumvent the problem,we construct two SOP models by using a repeated-pattern preamble and pilots. As the channel information can be obtained from the second SOP model which polynomial estimation period is shorter than that of general SOP model,the proposed scheme is superior to the existing methods.Simulation results are presented to illustrate the superiority of our proposed approach.This paper deals with an efficient method for channel estimation in Orthogonal frequency-division multiplexing（OFDM） systems. The channels are assumed to be Time-varying（TV） and approximated by a Secondorder polynomial（SOP） model. Increasing the polynomial order reduces the model error, but requires more polynomial estimation time. In order to circumvent the problem,we construct two SOP models by using a repeated-pattern preamble and pilots. As the channel information can be obtained from the second SOP model which polynomial estimation period is shorter than that of general SOP model,the proposed scheme is superior to the existing methods.Simulation results are presented to illustrate the superiority of our proposed approach.

关 键 词：Orthogonal frequency-division multiplexing（OFDM） Time-varying（TV） Second-order polynomial（SOP） Channel estimation A repeated-pattern preamble 

分 类 号：TN929.53[电子电信—通信与信息系统]