脉冲无线电通信系统的正交定时估计方法  

Orthogonal Timing Recovery of Impulse Radio

作　　者：尹华锐[1] 黄嵢 徐佩霞[1] 卫国[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,合肥230027

出　　处：《电子与信息学报》2006年第9期1630-1635,共6页Journal of Electronics & Information Technology

基　　金：国家863计划项目(2005AA123310)资助课题

摘　　要：超宽带(UWB)通信是目前无线通信研究的热点,其中脉冲无线电(ImpulseRadio,IR)技术采用亚纳秒脉冲信号作为信息传输的载体,数据传输速率大于100Mbps,具有超宽频谱和极低功率谱密度的优点。在采用IR技术的UWB通信中,脉冲的捕捉和同步是它的核心技术和难点。该文给出了采用基于正交分解进行脉冲同步的方法,相对于传统的使用匹配滤波器进行的定时估计和接收,具有结构简单,实现方便,在室内密集多径信道下和极大的符号间干扰下均能稳定工作的特点。仿真表明,该方法对多径捕获、脉冲重复频率和定时估计都有很好的性能。Ultra Wide-Band（VWB） communication is the focus of the research of wireless communication. Impulse radio （IR）is one of the most important technology of UWB with data rate higher than 100Mbps and it has ultrawide frequency span and ultra low power spectra density. The timing recovery and pulse synchronization are the most critical problems of IR. In this paper, anovel mechanism based on orthogonal decomposition is proposed for joint timing recovering and multi-path components detection. Simulation shows that the algorithm has good performance on multi-path components detection, pulse repetition period estimation and timing recovery in dense multi-path environment with heavy ISI.

关 键 词：脉冲无线电 定时估计 正交分解 

分 类 号：TN92[电子电信—通信与信息系统]