一种基于最小二乘估计的UWB同步捕获算法  

A Timing Acquisition Algorithm Based on LSE for UWB Communication

作　　者：杨莘元[1] 毕晓艳 吕威 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,哈尔滨150001

出　　处：《宇航学报》2008年第3期983-988,共6页Journal of Astronautics

基　　金：黑龙江科技攻关项目(GZ04A127)

摘　　要：在相关接收机的基础上提出了一种基于最小二乘估计的低复杂度PAM-TH-UWB信号同步捕获算法,并利用巴克码的局部自相关特性设计了一种简单的训练序列。该算法只需要对符号速率的采样结果作简单的相关运算就能实现同步参数的估计,与传统需要极高采样率(几GHz)的同步算法相比,它极大地降低了系统的复杂度和运算量,同时也提高了捕获速度。仿真结果表明,该算法在密集多径信道模型下能精确快速地实现同步捕获,使用较短的训练序列就可实现优良的捕获性能和系统误符号率。A timing acquisition algorithm based on Least Square Estimation （LSE） is presented. Using the Barker code, a novel training sequence is judiciously designed. Compared to the conventional algorithm with high sample rate （GHz）, the scheme achieves timing acquisition at the receiver using simple correlation operations over the samples at the symbol rate, which reduces considerably implementation complexity and acquisition time. The acquisition performance in the mutipath channel are also provided in terms of simulation, which indicates that with a small number of training symbols, the scheme achieves a high synchronization performance.

关 键 词：PAM-TH-UWB 同步捕获 最小二乘估计(LSE) 训练序列 

分 类 号：TN92[电子电信—通信与信息系统]