适用于IEEE 802.11ac的帧同步算法  

Frame synchronization algorithm based on IEEE 802.11ac

作　　者：陈哲[1] 杨洋[2] 唐小虎[1] 

机构地区：[1]西南交通大学信息科学与技术学院,四川成都610031 [2]西南交通大学数学学院,四川成都610031

出　　处：《计算机工程与设计》2015年第10期2645-2649,共5页Computer Engineering and Design

摘　　要：由于采用了OFDM技术,IEEE 802.11ac系统对同步误差极其敏感,为获得较好的帧同步性能,提出一种帧同步算法。通过采用统计分析的方法获得该算法中延时自相关函数实部的统计特征,推导虚警概率与漏检概率的理论公式及最佳的理论门限。仿真结果表明,与传统算法相比,该算法具有更低的虚警概率与漏检概率,具有更好的帧同步性能。IEEE 802.11 ac system is sensitive to synchronization error since it adopts OFDM technology,to obtain better performance of frame synchronization,a frame synchronization algorithm was proposed.According to the analysis of the real component of the delay autocorrelation function,the theoretical formula of both the false alarm probability and the missed detection probability were derived.Simulation results show that,compared with traditional algorithms,the proposed algorithm has lower false alarm probability and lower missed detection probability,which better performs in terms of frame synchronization.

关 键 词：IEEE 802.11ac 帧同步 虚警概率 漏检概率 符号间干扰 信噪比 

分 类 号：TP393.17[自动化与计算机技术—计算机应用技术]