基于ZC序列的CO-OFDM系统定时同步改进算法  

Timing synchronization algorithm based on Zadoff-Chu sequences for CO-OFDM systems

作　　者：刘剑飞[1,2] 魏春歌 曾祥烨[1,2] 卢嘉[1,2] 

机构地区：[1]河北工业大学电子信息工程学院,天津300401 [2]天津市电子材料与器件重点实验室,天津300401

出　　处：《光通信技术》2017年第9期56-59,共4页Optical Communication Technology

基　　金：天津市自然科学基金(15JCYBJC17000)资助;河北省自然科学基金青年项目(F2015202331)资助;河北省教育厅基金重点项目(ZD2017021)资助

摘　　要：首先简单介绍了CO-OFDM系统的组成结构及符号定时同步方法。针对采用Schmidl&Cox算法及相关改进算法进行符号定时同步时存在的峰值平台与副峰干扰问题,提出一种基于Zadoff-Chu(ZC)序列的改进算法。最后通过仿真实验验证了该算法的有效性,提高了定时同步的精度,同时解决了基于PN序列符号定时同步算法存在的高PAPR的问题。Firstly this paper simply introduces the structure and symbol timing synchronization method of CO-OFDM system. Aiming at solving the plateau and side lobes interference problem of Schmidl＆Cox and the other improved algorithms, an improved timing synchronization algorithm based on Zadoff-Chu sequence is proposed. At last, by experimental simulation, the efficiency of the proposed algorithm has been proved. The new method can not only improve the accuracy of timing synchronization, but also solve the problem of high PAPR.

关 键 词：CO—OFDM ZADOFF-CHU序列 符号定时同步 

分 类 号：TN915.62[电子电信—通信与信息系统]