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.
出处
《微计算机信息》
北大核心
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)
关键词
超宽带
同步捕获
训练序列
密集多径
Ultra Wideband （UWB）, Timing Acquisition, training sequence, dense multipath
