一种衰落信道下的OFDM载频同步跟踪算法  

Tracking algorithm of OFDM carrier frequency synchronization on fading channels

作　　者：朱光喜[1] 张青春[1] 蔡玮[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2004年第1期56-59,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划资助项目 (2 0 0 1AA12 10 31)

摘　　要：提出了一种适合无线衰落信道的正交频分复用 (OFDM )系统载频同步跟踪的算法 .算法的关键是在发送符号中插入相同的导频序列 ,利用相邻导频序列的差分相关值的相位来估计载波频率偏差 .理论分析和仿真表明 ,该算法估计范围较小 ,但估计精度高 ,适用于载频同步跟踪阶段 ,可工作于低信噪比条件下 。A tracking algorithm of OFDM carrier frequency synchronization on wireless fading channels was presented. In this algorithm, the same pilot sequences in symbols were inserted while the carrier frequency offset was estimated in the receiver by correlating pilot sequences from adjacent symbols. The analysis and simulation showed that the frequency offset efficiently estimated was little but accurate, and the algorithm was suitable for carrier frequency synchronization tracking, could work well in the environment with low SNR and had good performance on fading channels.

关 键 词：正交频分复用 衰落信道 同步跟踪 

分 类 号：TN929.5[电子电信—通信与信息系统]