信息与电子工程2012，Vol.10Issue(3)：300-304,318,6.
MU-MIMO-OFDM上行中基于部分频偏预补偿的频偏同步
Carrier frequency synchronization based on pre-compensation of partial frequency offset in MU-MIMO-OFDM uplink
摘要
Abstract
In MU-MIMO-OFDM (Multiple-User Multiple-Input-Multiple-Output-Orthogonal Frequency Division Multiplexing) uplink, the Carrier Frequency Offset(CFO) estimation and compensation need channel estimation results, and the estimations using pilots in frequency domain always suffer from Inter-Carrier Interference(ICI). A partial CFO compensation mechanism is proposed in this paper, which compensates part of CFO of a certain frequency before Fast Fourier Transform(FFT) at each receiving antenna. ICI power in the receiving signal is minimized, needing not to change the algorithms of CFO and channel estimations. In order to decide the frequency of the pre-compensated CFO, the relationship between ICI power and the pre-compensated frequency is analyzed first, and then an optimization problem is built, of which the close-form approximate optimal solution is given. At last, the improvements of the estimation with the partial CFO pre-compensation are verified by simulations.关键词
多用户多输入多输出系统/正交频分复用/载波频偏同步/载波间干扰Key words
Multiple-User Multiple-Input-Multiplc-Output/ Orthogonal Frequency Division Multiplexing/ carrier frequency synchronization/ Inter-Carrier Interference分类
电子信息工程引用本文复制引用
何凡,王旭,胡波..MU-MIMO-OFDM上行中基于部分频偏预补偿的频偏同步[J].信息与电子工程,2012,10(3):300-304,318,6.基金项目
国家自然科学基金资助项目(No.60972024) （No.60972024）
国家教育部博士点基金资助项目(No.20090071120087) （No.20090071120087）
联芯科技有限公司LTE-Advamced终端符号级算法优化课题资助项目(LC0321C11030366) （LC0321C11030366）
