分布式MIMO-OFDM定时同步算法的研究及比较  

Comparative Timing Synchronization Method for Distributed MIMO-OFDM Systems

作　　者：张驰[1] 韩太林[1] 陈小云[2] 

机构地区：[1]长春理工大学,长春130022 [2]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《计算机系统应用》2014年第4期164-167,213,共5页Computer Systems & Applications

摘　　要：多输入多输出-正交频分复用(MIMO-OFDM)技术是下一代4G通信的核心技术,具有频谱利用率高,抗干扰能力强,信道容量大等优点.分布式MIMO-OFDM系统会产生多时延、多频偏,同时对定时和频偏非常敏感,所以对分布式MIMO-OFDM同步算法的研究更加具有实际意义.文章对目前三种分布式MIMO-OFDM定时同步算法从序列结构,性能做了全面的比较分析与总结,并通过MATLAB仿真进行比较,得出运用CAZAC序列作为子载波数据的反向共轭定时算法性能突出.Multiple input multiple output-orthogonal frequency division multiplexing MIMO-OFDM technology is the core of the next generation（4G） of communication technology. MIMO-OFDM has the advantages of high spectrum efficiency, strong anti-interference capability and large Channel capacity. Distributed MIMO-OFDM system can produce time delay and frequency offset. It is also very sensitive to the timing and frequency offset. So, the study of distributed MIMO-OFDM synchronization algorithm is more practical significance. The article made a comprehensive analysis and summary from the sequence structure and the performance of these three current kinds of distributed MIMO-OFDM timing synchronization algorithm, and through the MATLAB simulation comparison. It acquires to use CAZAC sequence as subcarrier data reverse conjugate timing algorithm has outstanding performance.

关 键 词：定时敏感 频偏估计 定时同步 频率同步 

分 类 号：TN929.53[电子电信—通信与信息系统]