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基于子空间的MIMO OFDM盲载波同步方法
引用本文:WANG De-gang,魏急波,HAN Xiang.基于子空间的MIMO OFDM盲载波同步方法[J].系统仿真学报,2008,20(11):2806-2809.
作者姓名:WANG De-gang  魏急波  HAN Xiang
作者单位:国防科学技术大学电子科学与工程学院,湖南长沙,410073
摘    要:针对MIMO OFDM系统,分析了多径信道与频域信号Hadamard积子空间的特点,构造了适合多天线条件下的基于子空间投影的频偏估计代价函数.该代价函数只和归一化频偏与接收数据有关,不需要信道信息和发送数据信息,因此是一种能有效提高数据传输效率的盲频偏估计方法.与已有盲同步方法相比,所提方法不需要使用虚子载波,因而频谱利用率可得到进一步提高.文中对算法的性能进行了仿真,验证了算法可对一个子载波间隔内的归一化频偏进行精确估计.结果表明,该方法性能优于已有文献提出的MIMO OFDM盲载波同步方法.

关 键 词:子空间  载波频偏  盲估计

Blind Carrier Synchronization Method for MIMO OFDM System Based on Subspace
WANG De-gang,WEI Ji-bo,HAN Xiang.Blind Carrier Synchronization Method for MIMO OFDM System Based on Subspace[J].Journal of System Simulation,2008,20(11):2806-2809.
Authors:WANG De-gang  WEI Ji-bo  HAN Xiang
Abstract:By analyzing the properties of Hadamard production subspace between the multipath channel and frequency domain signal of the MIMO OFDM system, the cost function of CFO (Carrier Frequency Offset) for the scene of multi antennas was given based on the subspace projection. No preliminary knowledge of the channels and the transmitter data are needed, so the method is one of the blind CFO estimation algorithms which can improve the transmitting efficiency of the system. Compared with the existing blind synchronization methods, the proposed algorithm does not need the virtual subcarriers, so that the available data bandwidth is higher furthermore. Simulation results confirm that it can estimate the normalized carrier frequency within a subcarrier space efficiently,and the superior performance of the proposed algorithm is achieved over the other available blind approaches for MIMO OFDM systems in the literature.
Keywords:MIMO OFDM
本文献已被 CNKI 维普 万方数据 等数据库收录!
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