模板修正的超宽带定时抖动抑制方法  

Method of Suppressing Timing-Jitter Based on Modified Template (STMT) for UWB System

作　　者：陈英俊[1] 吴海涛[1] 聂东[1] 

机构地区：[1]肇庆学院电子信息与机电工程学院,广东肇庆526061

出　　处：《计算机仿真》2013年第8期198-203,共6页Computer Simulation

基　　金：广东省部产学研结合引导项目(2011B090400253);肇庆学院精品课程建设基金资助项目(200916)

摘　　要：在脉冲超宽带系统性能优化设计的研究中,脉冲超宽带系统对同步要求极高,特别是采用RAKE接收机时,一个微小的定时抖动可能会引起系统性能严重下降。为了降低系统对同步性能的要求,提出了在接收端采用本地模板修正的超宽带系统定时抖动的抑制方法,给出了具体的模板修正流程及系统实现方案。通过对接收端的较少改动,降低了系统设计的复杂度,避免了大量的迭代运算和复杂的信号处理。数学分析理论证明改进的抑制方法是最优接收机理论的扩展,仿真验证并分析了在抑制系统时延抖动方面的正确性与有效性。在提高系统定时抖动抑制作用的同时,并未引入过多的系统复杂度,更利于系统实现性能优化。Extremely short duration of pulse introduces stringent requirements for synchronization in UWB system.Especially when using RAKE receiver,a small timing jitter of system would cause performance degradation severely.In order to reduce the requirements for synchronization,a method of suppressing timing jitter based on modified local template at the receiver was proposed,providing the working procedures and block diagram of system implementation.Less alteration at the receiving end reduces the complexity of system design and avoids a large number of iterative calculation and complex signal processing.Results of mathematical analysis prove that the proposed method is an extension for optimal receiver theory.The correctness and effectiveness of the scheme were validated by some theoretical simulations which can illustrate the ability to reduce damage to system performance due to timing jitter.The proposed scheme introduces less complexity to implement the system in the event of enhancing the suppressing effect of time jitter.

关 键 词：脉冲超宽带 定时抖动 误码率 模板修正 

分 类 号：TN914[电子电信—通信与信息系统]