基于训练循环前缀的OFDM同步算法  

Synchronization algorithm for OFDM based on training cyclic prefix

作　　者：冯媛[1] 蒋亚平[1] 张荣涛[2] 蔡增玉[1] 李娜娜[1] 

机构地区：[1]郑州轻工业学院计算机与通信工程学院,河南郑州450002 [2]广东省电信规划设计院有限公司,广东广州510630

出　　处：《郑州轻工业学院学报（自然科学版）》2009年第3期116-119,共4页Journal of Zhengzhou University of Light Industry:Natural Science

基　　金："十一五"国家科技支撑计划项目(2006BAK01A38);河南省教育厅基础研究项目(2008A510018);郑州市科技计划项目(074SCCG23109-2)

摘　　要：提出了一种基于训练循环前缀的OFDM同步算法:在OFDM符号后端插入训练序列,由此训练序列产生循环前缀,在接收端根据两者的时域相关性质做定时估计,进而进行小数倍频偏估计.该算法不仅能大幅度提高符号定时估计和载波小数倍频偏估计的性能,还能在一定范围内进行载波整数倍频偏估计.仿真结果表明,该算法复杂度小,完全能解决实际的OFDM同步问题.An OFDM synchronization algorithm was presented, which utilized the training cyclic prefix. First, the training sequence was inserted into the back-end of OFDM symbol. Second, the cyclic prefix was gotten according to the training sequence. And then it made the timing estimation at receiver based on time domain correlation. At last, the fractional frequency offset was estimated. The algorithm not only im- proved the performance of symbol timing and fractional frequency offset estimation, but also estimated the integer frequency offset under certainty range. The simulation results showed that the complexity of this algorithm is very small; and this algorithm can completely solve the synchronization acquisition problem of OFDM system in practice.

关 键 词：OFDM 符号定时估计 小数倍载偏 循环训练前缀 同步算法 

分 类 号：TN914.53[电子电信—通信与信息系统]