Efficient integer frequency offset estimation for OFDM systems  

作　　者：吴贇 Ding Ming Luo Hanwen Huang Jianguo Liu Renmao 

机构地区：[1]Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200240, P.R.China t [2]Marine Engineering College, Northwestern Polytechnical University, Xi＇an 710072, P.R.China [3]Sharp Advanced R＆D Centre, Sharp Electronnics Co. Ltd., Shanghai, P.R.China

出　　处：《High Technology Letters》2007年第2期164-168,共5页高技术通讯（英文版）

摘　　要：An efficient scheme of integer frequency offset estimate for orthogonal frequency division multiplexing （OFDM） systems is proposed based on a training symbol with several identicalparts. In this scheme, the received training symbol is first reshaped into several sub-symbols.It shows that the reshaping process in-troduees time diversity multiplexing.After a special fast Fourier transform （FFT） algorithm is applied to the sub-symbol,the integer frequency is estimated by finding the maximum magnitude of the resulting fre-quency domain signal.To improve the estimate performance,diversity combining methods are presented to makefull use of the multiple frequency domain sub-symbols.Compared to the traditional scheme, theproposed one has an improved estimate performance demonstrated by the computation simulation, while maintaining a very low complexity.

关 键 词：OFDM ESTIMATION integer carrier frequency offset FFT 

分 类 号：TN911[电子电信—通信与信息系统]