Blind Carrier Frequency Offset Estimation via Power Spectrum Analysis in MIMO OFDM Systems  

作　　者：武露 张贤达 

机构地区：[1]State Key Laboratory on Intelligent Technology and Systems, Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Automation, Tsinghua University

出　　处：《Tsinghua Science and Technology》2009年第1期146-150,共5页清华大学学报（自然科学版（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos. 60675002 and 60496311);the Basic Research Foundation of Tsinghua National Laboratory for Information Science and Technology (TNList)

摘　　要：As a generalization of orthogonal frequency-division multiplexing （OFDM） systems, multi-input multi-output （MIMO） OFDM systems are very sensitive to carrier frequency offset （CFO）. This paper proposes a blind CFO estimation method based on power spectrum analysis, which has high bandwidth efficiency and is much less complex. This method can be used to estimate the residual CFO, which is less than half of the subcarrier spacing. The method uses a cosine cost function to get a closed-form CFO estimate. Simulation results illustrate that the method is effective for MIMO OFDM systems.As a generalization of orthogonal frequency-division multiplexing （OFDM） systems, multi-input multi-output （MIMO） OFDM systems are very sensitive to carrier frequency offset （CFO）. This paper proposes a blind CFO estimation method based on power spectrum analysis, which has high bandwidth efficiency and is much less complex. This method can be used to estimate the residual CFO, which is less than half of the subcarrier spacing. The method uses a cosine cost function to get a closed-form CFO estimate. Simulation results illustrate that the method is effective for MIMO OFDM systems.

关 键 词：carrier frequency offset （CFO） multi-input multi-output orthogonal frequency-division multiplexing （MIMO OFDM） power spectrum analysis （PSA） 

分 类 号：TN919.3[电子电信—通信与信息系统]