基于ML准则的UWB信号同步捕获方法  

Timing acquisition scheme for UWB signals based on ML criterion

作　　者：李进[1] 郑继禹[1] 

机构地区：[1]桂林电子科技大学通信研究所,广西桂林541004

出　　处：《计算机应用研究》2007年第10期68-69,74,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(60372037);广西高校百名中青年学科带头资助计划项目(桂教人[2004]76)

摘　　要：为了在超宽带通信系统中,简单、快速地实现信号的同步捕获和信道估计,提出一种首先利用相关器粗略估计出有用信号的起始位置,然后采用最大似然估计准则实现同步捕获和信道估计的分步同步捕获方法。该方法既提高了估计精度,又有效降低了接收机的复杂度和处理时间。In order to implement timing acquisition and channel estimation simply and rapidly in UWB communications, this paper proposed a two-stage acquisition scheme. The first step was to approximately estimate the starting position of the useful signals by correlator,then employed a maximum likelihood criterion for achieving both timing acquisition and channel estimation. This method improves estimation accuracy, and also reduces complexity of receiver and operating time.

关 键 词：超宽带 同步捕获 信道估计 最大似然 

分 类 号：TN911.23[电子电信—通信与信息系统]