一种适用于高速OFDM的符号定时同步算法  

A Symbol Timing Synchronization Method for High-rate OFDM System

作　　者：张竞[1] 张洪太[1] 李立[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2013年第1期62-68,共7页Space Electronic Technology

摘　　要：OFDM系统以其优秀的频带利用率受到了广泛的应用。本文就OFDM系统在高速数据传输环境下出现的符号定时同步问题与经典同步算法中的问题的不同点做了分析,并对针对小子载波数情况出现的不同对已有的经典符号定时同步算法做出了相应的改进。最后使用Matlab对其进行了仿真,可以得出在小子载波数的情况下捕获性能良好,是一种可以用于高速OFDM系统的符号定时同步算法。OFDM system is wildly used fot its high bandwidth efficiency. In this paper we analyze the symbol timing synchronization problem which is different between high-rate OFDM system and classic method. Then make a corresponding improvement according to the differ appeared in the situation of small number of subcarrier. At last do the simulation with Matlab. The result shows that the acquisition performance is good enough for the high-rate OFDM system symbol timing syn-chronization.

关 键 词：正交频分复用(OFDM) 符号定时同步 导频 时间度量判决 

分 类 号：TN929.5[电子电信—通信与信息系统]