PROPAGATOR BASED CLOSED-FORM BLIND CARRIER FREQUENCY OFFSET ESTIMATION FOR OFDM SYSTEMS  

作　　者：Li Jun Liao Guisheng Wu Yuntao 

机构地区：[1]Key Lab for Radar Signal Processing, Xidian Univ., Xi＇an 710071, China [2]Integrated Digital System Lab, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Journal of Electronics(China)》2006年第1期121-123,共3页电子科学学刊（英文版）

基　　金：Supported by National Natural Science Foundation of China (No. 60172028)

摘　　要：Most of the blind Orthogonal Frequency Division Multiplexing (OFDM) Carrier Frequency Offset (CFO) estimators necessitate large number of samples to ensure the estimation accuracy. However, the number of samples can not be selected too large because of the carrier offset drift. In this letter, a new closed form algorithm for blind OFDM CFO estimation in frequency-selective channel is proposed. This method utilizes the propagator obtained from data matrix and the diagonal loading technique, thus it has better performance even only using one or two OFDM blocks. Furthermore, the range of the CFO estimation which can be handled is overall transmission spectral. Simulation results confirm its effectiveness.Most of the blind Orthogonal Frequency Division Multiplexing （OFDM） Carrier Frequency Offset （CFO） estimators necessitate large number of samples to ensure the estimation accuracy. However, the number of samples can not be selected too large because of the carrier offset drift. In this letter, a new closed form algorithm for blind OFDM CFO estimation in frequency-selective channel is proposed. This method utilizes the propagator obtained from data matrix and the diagonal loading technique, thus it has better performance even only using one or two OFDM blocks. Furthermore, the range of the CFO estimation which can be handled is overall transmission spectral. Simulation results confirm its effectiveness.

关 键 词：Orthogonal Frequency Division Multiplexing （OFDM） Carrier Frequency Offset （CFO） PROPAGATOR Diagonal loading 

分 类 号：TN91[电子电信—通信与信息系统]