Fractional Frequency Offset Estimation for OFDM Systems in Non-Cooperative Communication  

作　　者：Mingqian Liu Jian Chen Bingbing Li Junfang Li 

机构地区：[1]State Key Laboratory of Integrated Service Networks,Xidian University [2]Collaborative Innovation Center of Information Sensing and Understanding,Xidian University

出　　处：《China Communications》2016年第9期65-71,共7页中国通信（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.61501348 and 61271299;China Postdoctoral Science Foundation funded project under Grant No.2014M562372;Natural Science Basic Research Plan in Shaanxi Province of China under Grant No.2016JQ6039;the 111 Project under Grant No.B08038

摘　　要：The traditional fractional frequency offset(FFO) estimation schemes for orthogonal frequency division multiplexing(OFDM) in non-cooperative communication have the problems of susceptible performance with the frequency offset values and the number of OFDM symbols,a novel fractional frequency offset blind estimation scheme based on EKF for OFDM systems is conceived.The nonlinear function of the frequency offset is calculated by employing the correlation.And then the frequency offset is estimated by means of the iterative algorithm of EKF.The finally fractional frequency offset is estimated by adopting repeated the above process.Simulation results demonstrate that the proposed scheme is robust to the frequency offset values without any requirements of a prior knowledge.The traditional fractional frequency offset （FFO） estimation schemes for orthogonal frequency division multiplexing （OFDM） in non-cooperative communication have the problems of susceptible performance with the frequency offset values and the number of OFDM symbols, a novel fractional frequency offset blind estimation scheme based on EKF for OFDM systems is conceived. The nonlinear function of the frequency offset is calculated by employing the correlation. And then the frequency offset is estimated by means of the iterative algorithm of EKF. The finally fractional frequency offset is estimated by adopting repeated the above process. Simulation results demonstrate that the proposed scheme is robust to the frequency offset values without any requirements of a prior knowledge.

关 键 词：parameter estimation fractional frequency offset orthogonal frequency division multiplexing extended kalman filter 

分 类 号：TN929.53[电子电信—通信与信息系统]