一种新的用于UWB RAKE接收机的自适应算法:快速横向滤波算法  

A Novel Adaptive Algorithm Using in UWB RAKE Receiver: Fast Transversal Filter Algorithm

作　　者：尹勇[1] 俞能海[1] 董伟杰[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系多媒体计算与通信教育部-微软重点实验室,安徽合肥230027

出　　处：《电子学报》2005年第10期1845-1848,共4页Acta Electronica Sinica

基　　金：国家自然基金重大项目(No.60390540);国家863高技术研究发展计划(No.2002AA783043)

摘　　要：本文首次提出将快速横向滤波(FTF)算法引入超宽带(UWB)通信系统的接收机结构中.通过引入遗忘因子对角矩阵,推导了带有遗忘因子的FTF滤波器的递推算法.FTF算法可以自适应地跟踪接收机输入信号的幅度衰减,做出实时地估计.仿真实验表明:FTF算法在运算量、收敛速度和误码率等性能上要优于常用的RLS算法,尤其FTF算法的收敛速度对数据的相关性不敏感,比RLS算法更具有吸引力.A novel idea of using Fast Transversal Filter （FTF） adaptive algorithm in Ultra WideBand （UWB） RAKE receiver is proposed for the first time. By using forgetting factor diagonal matrix, we derive the recursion formula of FTF algorithm with forgetting factor lambda. The receiver with FTF adaptive filters can track the amphtude of received signal to form a real-time amphtude estimation. The simulation results show that FTF algorithm has a better performance than RLS algorithm in convergence speed, bit error rate and computational complexity, and the special point is that the convergence speed is insensitive to the relativity of the data in FTF algorithm.

关 键 词：超宽带 RAKE接收机 快速横向滤波器 

分 类 号：TN915[电子电信—通信与信息系统]