华南理工大学学报(自然科学版) ›› 2009, Vol. 37 ›› Issue (1): 1-5.

• 电子、通信与自动控制 •    下一篇

一种稳定的直扩超宽带系统快速同步算法

王洪江韦岗刘桂开冯义志刘磊安2   

  1. 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
  • 收稿日期:2008-02-29 修回日期:2008-07-30 出版日期:2009-01-25 发布日期:2009-01-25
  • 通信作者: 王洪江(1977-),男,博士后,主要从事超宽带通信系统关键技术研究. E-mail:eehjwang@hotmail.com
  • 作者简介:王洪江(1977-),男,博士后,主要从事超宽带通信系统关键技术研究.
  • 基金资助:

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

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

Wang Hong-jiang1  Wei Gang1  Liu Gui-kai1  Feng Yi-zhi1  Liu Lei-an2   

  1. 1. School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. College of Computer Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, Guangdong, China
  • Received:2008-02-29 Revised:2008-07-30 Online:2009-01-25 Published:2009-01-25
  • Contact: 王洪江(1977-),男,博士后,主要从事超宽带通信系统关键技术研究. E-mail:eehjwang@hotmail.com
  • About author:王洪江(1977-),男,博士后,主要从事超宽带通信系统关键技术研究.
  • Supported by:

    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: 本文分析了超宽带通信系统中同步算法的特点及其重要性,提出了一种快速捕获最大能量值路径信号的同步算法,利用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路径信号来实现稳定的定时同步。文中推导了平均捕获时间的表达式,并进行了仿真实验。结果表明,与已有的各种快速算法相比,本文推荐的算法具有更快速、更稳定的同步性能。

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

Abstract:

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.

Key words: direct-spread uhra-wideband system, multi-path propagation, multi-hypothesis timing synchronization algorithm, mean acquisition time