一种OFDM系统的频差补偿同步方法  

A Novel Frequency Compensation Algorithm for OFDM Systems

作　　者：温学兵[1] 韩华亭[1] 陈西宏[1] 李荣昆[2] 王强[3] 

机构地区：[1]空军工程大学导弹学院,陕西咸阳713800 [2]西昌卫星发射中心,四川西昌615606 [3]中国航天二院空军代表室,北京100854

出　　处：《通信技术》2007年第12期38-39,42,共3页Communications Technology

摘　　要：一般的系统同步要求以定时同步为先,然后进行频偏的估计,但大频差偏移往往影响到了系统的符号粗同步定时。针对大频差下信号难以捕获的问题,文中提出预设频差补偿的同步技术。理论分析和仿真结果表明,所采用的同步方法,可以比较准确地完成系统的符号定时同步。Generally, the system synchronization requires timing synchronization for the first, and then the frequency estimates. However, the big frequency differences often affect the system rough timing synchronization. In the light of being difficult to capture the signal when big frequency offset occurs over the channel; frequency error compensation scheme is brought forward. Theoretical analysis and simulation results show that, by using the synchronization algorithm, more accurate system symbol timing synchronization can be achieved.

关 键 词：OFDM 频差补偿 符号定时同步 

分 类 号：TN915.04[电子电信—通信与信息系统]