一种稳定的直扩超宽带系统快速同步算法  

A Stable Rapid Synchronization Algorithm for Direct-Spread Ultra-Wideband Systems

作　　者：王洪江[1] 韦岗[1] 刘桂开[1] 冯义志[1] 刘磊安[2] 

机构地区：[1]华南理工大学电子与信息学院,广州广东510640 [2]仲恺农业工程学院计算机科学与工程学院,广州广东510225

出　　处：《华南理工大学学报（自然科学版）》2009年第1期1-5,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家“863”计划项目(2007AA01Z210,2007AA01Z2b3);中国博士后科学基金资助项目(20080430831)

摘　　要：为了提高直扩超宽带通信系统中同步算法的可靠性和快速性,提出了一种稳定的快速捕获最大能量值的路径信号的同步算法,推导了平均捕获时间的表达式.该算法根据室内多径信道的传输特性和多假设快速同步算法的特点,通过快速捕获具有最大能量值的路径信号来实现稳定的定时同步.仿真实验结果表明,与现有的快速算法相比,文中算法具有更快速、更稳定的同步性能.In order to improve the reliability and speed of the synchronization algorithms for a direct-spread ultrawideband communications system, a stable rapid synchronization algorithm is proposed to acquire the path signal with the maximum energy, with the mean acquisition time being also formulated. In this algorithm, the characteristics of indoor muhi-path propagation and multi-hypothesis rapid synchronization algorithms are considered, and the path signal with the maximum energy is rapidly acquired for the stable timing synchronization. Simulated results indicate that the proposed algorithm is more rapid and stable than the existing synchronization algorithms.

关 键 词：直扩超宽带系统 多径传输 多假设定时同步算法 平均捕获时间 

分 类 号：TN925.93[电子电信—通信与信息系统]