基于OFDMA的同频组网下的同步算法  

Synchronization Algorithm in Networking with the Same Frequency Based on OFDMA

作　　者：张兢[1] 徐伟[1] 李雪梅[1] 李成勇[1] 王猛[1] 

机构地区：[1]重庆理工大学电子信息与自动化学院,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2012年第1期85-89,共5页Journal of Chongqing University of Technology：Natural Science

基　　金：重庆市教委自然科学基金资助项目(KJ070606)

摘　　要：在同频组网环境下,提出一套OFDMA系统的同步算法,在扇区干扰的情况下能很好地完成同步,特别是在扇区干扰严重的情况下仍然能准确地估计出频偏和帧起始位置,可以在同频组网的条件下很好地完成帧检测、符号定时、频偏估计。仿真结果表明:该算法在有扇区干扰的多径信道下同步性能很好,虚警概率比较低,算法复杂度也不高。Program requires a lot of different frequencies and spectrum consumption in networking has different frequencies.With the actual constraints of the limited frequency band,the same frequency network is the better choice.One or more frequencies can complete it.The synchronization algorithm based on pseudo period of preamble in 802.16e fails in interference of the adjacent sectors.The synchronization algorithm based on OFDMA proposed in this paper can implement the frame detection,symbol timing,and frequency offset estimation.Simulation results show that the algorithm in a sector interference under multipath channel synchronization performance has good performance even in multi-path channel with severe interference caused by the adjacent sectors.

关 键 词：同步 帧检测 定时 频偏 

分 类 号：TP911[自动化与计算机技术]