Blind channel estimation for multiple antenna OFDM system subject to unknown carrier frequency offset  

作　　者：Xiaofei Zhang Dazhuan Xu 

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

出　　处：《Journal of Systems Engineering and Electronics》2014年第5期721-727,共7页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(61371169;61301108;61071164);the Fundamental Research Funds for the Central Universities(NS2013024)

摘　　要：The problem of channel estimation for multiple an- tenna orthogonal frequency division multiplexing （OFDM） systems subject to unknown carrier frequency offset （CFO） is addressed. Multiple signal classification （MUSIC）-Iike algorithm, which generally has been used for direction estimation or frequency estimation, is used for channel estimation in multiple antenna OFDM systems. A reduced dimensional （RD）-MUSIC based algorithm for channel estimation is proposed in multiple antenna OFDM systems with unknown CFO. The Cramer-Rao bound （CRB） of channel estimation in multiple antenna OFDM systems with unknown CFO is derived. The proposed algorithm has a superior performance of channel estimation compared with the Capon method and the least squares method.The problem of channel estimation for multiple an- tenna orthogonal frequency division multiplexing （OFDM） systems subject to unknown carrier frequency offset （CFO） is addressed. Multiple signal classification （MUSIC）-Iike algorithm, which generally has been used for direction estimation or frequency estimation, is used for channel estimation in multiple antenna OFDM systems. A reduced dimensional （RD）-MUSIC based algorithm for channel estimation is proposed in multiple antenna OFDM systems with unknown CFO. The Cramer-Rao bound （CRB） of channel estimation in multiple antenna OFDM systems with unknown CFO is derived. The proposed algorithm has a superior performance of channel estimation compared with the Capon method and the least squares method.

关 键 词：channel estimation orthogonal frequency division multiplexing （OFDM） multiple antennas multiple signal classification （MUSIC）. 

分 类 号：TN929.53[电子电信—通信与信息系统]