一种TH-UWB信号同步捕获算法研究  

A Timing Acquisition Algorithm for TH-UWB Signals

作　　者：毕晓艳 杨莘元[1] 李一兵[1] 殷潜[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《微计算机信息》2007年第21期91-92,84,共3页Control & Automation

基　　金：黑龙江科技攻关项目(GZ04A127)

摘　　要：针对跳时超宽带(TH-UWB)系统,提出了一种基于特殊训练序列的同步捕获算法,该算法使用宽度为一个信息符号的滑动时间窗对接收信号依次截取,通过设计一种特殊的训练序列使得相邻两段截取信号的相关值仅与时间窗的滑动时延有关,然后利用这种滑动搜索来实现同步捕获参数的估计。这种算法能够有效地捕获密集多径信道下极窄脉冲的能量,并且降低了运算复杂度和同步捕获时间。结果表明,在训练序列长度为16、32时误码性能曲线和理想同步情况下十分接近。A timing acquisition algorithm based on special training symbols for TH-UWB signals is presented. In this scheme, received signal is truncated with a sliding window with symbol time duration and a special training sequsence is designed to ensure that the correlation between two adjacent signal interceptions depends only on the delay of the sliding window. And then estimation for timing acquisition parameters is achieved by serial searching. The algorithm is able to increase the energy captured in the dense muhipath channel and reduce considerably implementation complexity and acquisition time, Simulation results indicate that with 16. 32 training symbols, the scheme achieves BER performance close to that of perfect timing.

关 键 词：超宽带 同步捕获 训练序列 密集多径 

分 类 号：TN92[电子电信—通信与信息系统]