DS-UWB系统中利用辅助序列的MAX/TC准则同步算法研究  

Study of MAX/TC Criterion Acquisition Algorithm Using Auxiliary Sequence for DS-UWB System

作　　者：齐丽娜[1] 朱洪波[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《电子与信息学报》2007年第12期2943-2947,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60572024);教育部博士点基金(20050293003)资助课题

摘　　要：DS-UWB系统是否能够获得快速可靠的信号同步是系统设计的一项重要指标。该文在最大值选择/过门限(MAXimum selection/Threshold Comparison,MAX/TC)准则DS-UWB系统同步捕获算法的基础上,提出一种采用辅助序列的MAX/TC准则改进型同步捕获算法,算法利用辅助序列信息判断本地伪随机序列发生器相位更新方向,能够较大程度降低系统伪随机序列同步捕获时间;通过对改进算法进行较为详细的理论分析,并且在超宽带室内信道环境中进行仿真实验,结果表明,采用该文算法可以在保证系统同步捕获性能的同时有效缩短平均同步捕获时间。The code acquisition is an important issue of DS-UWB system design. Because the MAXimum selection/Threshold Comparison（MAX/TC） criterion for code acquisition has good performance in DS-UWB system, in this paper, a MAX/TC criterion for code acquisition algorithm using the information of the auxiliary sequence, which can be used to reduce the acquisition time of the coarse Pseudo-Noise （PN） sequences, is presented. Then the theoretical analysis is given and simulation tests of proposed acquisition algorithm are carried out in UWB indoor channel environment. The simulation results show that with the proposed algorithm, the mean acquisition time can be reduced considerably while the acquisition performance is maintained.

关 键 词：直接序列超宽带 多区最大值选择和过门限 伪随机序列 辅助序列 平均捕获时间 

分 类 号：TN92[电子电信—通信与信息系统]