Blind CFO estimation algorithm for OFDM systems by using generalized precoding and trilinear model  

作　　者：Xiaofei Zhang Dazhuan Xu 

机构地区：[1]Electronic Engineering Department, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, R R. China

出　　处：《Journal of Systems Engineering and Electronics》2012年第1期10-15,共6页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (60801052);the Aeronautical Science Foundation of China(2009ZC52036);Nanjing University of Aeronautics and Astronautics Research Funding (NS2012010; NP2011036)

摘　　要：This paper discusses the blind carrier frequency offset （CFO） estimation for orthogonal frequency division multiplexing （OFDM） systems by utilizing trilinear decomposition and genera- lized preceding. Firstly, the generalized precoding is employed to obtain multiple covariance matrices which are requisite for the trilinear model, and then a novel CFO estimation algorithm is proposed for the OFDM system. Compared with both the joint diagonalizer and estimation of signal parameters via rotational invariant technique （ESPRIT）, the proposed algorithm enjoys a better CFO estimation performance. Furthermore, the proposed algorithm can work well without virtual carriers. Simulation results illustrate the performance of this algorithm,This paper discusses the blind carrier frequency offset （CFO） estimation for orthogonal frequency division multiplexing （OFDM） systems by utilizing trilinear decomposition and genera- lized preceding. Firstly, the generalized precoding is employed to obtain multiple covariance matrices which are requisite for the trilinear model, and then a novel CFO estimation algorithm is proposed for the OFDM system. Compared with both the joint diagonalizer and estimation of signal parameters via rotational invariant technique （ESPRIT）, the proposed algorithm enjoys a better CFO estimation performance. Furthermore, the proposed algorithm can work well without virtual carriers. Simulation results illustrate the performance of this algorithm,

关 键 词：carrier frequency offset （CFO） orthogonal frequency division multiplexing （OFDM） generalized precoding trilinear model. 

分 类 号：TN929.5[电子电信—通信与信息系统] TP301.6[电子电信—信息与通信工程]