基于MIMO-OFDM系统的时频同步分析  

Time and Frequency Analysis of Synchronization Based on MIMO-OFDM System

作　　者：李建国[1] 李达飞[2] 韩方景[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南省长沙市410073 [2]北京航天飞行控制中心,北京100094

出　　处：《信息化研究》2010年第6期26-29,共4页INFORMATIZATION RESEARCH

摘　　要：MIMO-OFDM(多输入多输出-正交频分复用)作为第四代移动通信标准中最有力的竞争者,其优势十分突出。MIMO-OFDM系统既结合了两个系统的优点,又克服了OFDM在多径衰落问题上和MIMO在频率选择性问题上的不足。系统利用了时间、频率和空间的三种分集技术,使无线系统对噪声、干扰、多径的容限大大增加,在提高无线链路的有效性和可靠性方面具有巨大潜力。本文介绍了MIMO-OFDM系统的模型,并分析了系统时频同步的原理及各种常用算法,最后对系统的同步做了仿真并分析其结果,提出了算法的改进意见。MIMO-OFDM, as the most powerful competitor in the fourth generation mobile communication standards, has obvious advantages. MIMO-OFDM system not only incorporates the merits of MIMO and OFDM, but also overcomes the problems of multi-path fading in OFDM and frequency selectivity in MIMO. The system uses time, frequency and space diversity technology, substantially improving the tolerance of wireless system against noise, interference and multi-path fading, having great potential of improving the efficiency and reliability of wireless link. In this paper, MIMO-OFDM system model is presented, the principle of timefrequency synchronization and several commonly used algorithms are analyzed. Finally, we simulate the synchronization and analyze the result, propose some improvement suggestions for the algorithm.

关 键 词：MIMO OFDM 定时同步 频率同步 

分 类 号：TN929.5[电子电信—通信与信息系统]