UWB-IR中一种基于ML准则的快速同步捕获低阶算法  

Rapid timing acquisition low-step algorithm for UWB-IR based on ML criterion

作　　者：马龙[1] 王庭昌[2] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007 [2]总参第63研究所,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2006年第5期417-420,共4页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：超宽带冲击无线电（UWB-IR）通信系统需要有高速和高效的同步算法.通过对基于最大似然ML（maximum likelihood）准则的理论推导,提出了一种快速同步捕获算法,建立了基于脉冲通信的UWB-IR仿真通信系统,并且,在此基础上利用仿真数据分析了其估计误差性能及基于此算法的通信系统的误码性能.仿真结果表明,此算法能够在40 μs左右实现平均估计误差均值为0及平均估计误差均方根为0.12～0.15,而且经过此同步捕获算法的补偿,可以一定程度地提高系统的误比特性能.Ultra wideband-impulse radio（UWB-IR） communication system needs a high speed and high efficiency synchronization algorithm. Based on the maximum likelihood criterion, a rapid timing acquisition low-step algorithm was proposed. Then a UWB-IR communication system for simulation was established. And through simulations, both the evaluation performance of this algorithm and the BER performance of the communication system, which were based on this algorithm, were achieved. These results show that this algorithm can realize 0 of bias mean value and 0. 12-0. 15 of root of mean square in 40 μs, and can so improve BER of the communication system.

关 键 词：超宽带冲击无线电 脉冲重复速率 归一化误差均值 归一化误差均方根 

分 类 号：TN973[电子电信—信号与信息处理]