基于IEEE 802.11a改进的OFDM符号定时算法  

An Improved Symbol Synchronization Algorithm Based on IEEE 802.11a

作　　者：陈适[1] 张京梅[1] 

机构地区：[1]武汉理工大学信息工程学院,湖北武汉430070

出　　处：《武汉理工大学学报（信息与管理工程版）》2009年第3期354-357,共4页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：湖北省科技攻关基金资助项目(2006lg0049)

摘　　要：同步技术是正交频分复用(orthogonal frequency division multiplexing,OFDM)的关键技术之一,同步性能的优劣会对OFDM系统性能造成直接的影响。在系统分析同步误差对OFDM影响的基础上,针对延时自相关定时同步算法同步精度低的问题,提出了适用于IEEE802.11a标准的改进定时相关算法,并采用Matlab进行了仿真。仿真结果表明,该算法能有效克服噪声的影响,定时准确。The Synchronization technology,as one of the key technologies in OFDM, has become a heated topic in recent years. Whether the resuhs of synchronization are good or bad will make direct effect on the OFDM receivers. Based on the analysis of the effect of the synchronous errors on OFDM system, in view of the problem that the delay autocorrelation timing synchronization algorithm has the drawback of low precision, an improved algorithm suitable for IEEE 802.11 a standard was presented and simulated with Matlab. The simulation results show that the proposed algorithm can decrease the influence of noise and get exact symbol timing.

关 键 词：IEEE802.11A OFDM 定时同步 自相关 

分 类 号：TN929.5[电子电信—通信与信息系统]