二阶伏特拉滤波器RLS算法改进  

A Modified RLS Algorithm for Second-Order Volterra Filter

作　　者：陈凯亚[1] 王敏锡[1] 

机构地区：[1]西南交通大学电磁场与微波技术研究所,成都610031

出　　处：《电子科技大学学报》2005年第4期467-469,473,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家自然科学基金资助项目(60272003)

摘　　要：分析了二阶伏特拉滤波器的一种快速RLS算法,针对其存在的收敛速度与收敛精度之间的矛盾,构造了遗忘因子函数并取代该算法中的固定遗忘因子,得到改进的RLS算法。提出了遗忘因子函数的构造原则并分析了相关参数的选取方法。算例表明:改进的RLS算法能解决收敛速度与收敛精度之间的矛盾,有效地加快了收敛速度。A fast RLS algorithm for second-order Volterra filter is analyzed. And the contradiction between speed and accuracy of convergence is revealed. The modified RLS algorithm is presented by substituting constant forgetting-factor with function of forgetting-factor const ructed in this paper. Therules for constructing forgetting-factor function and the method for selecting parameters is discussed. Finally, a numerical example shows that the modified RLS algorithm result in faster convergence speed by solving the contradiction between speed and accuracy.

关 键 词：RLS算法 自适应滤波算法 二阶伏特拉滤波器 遗忘因子 最小二乘准则 

分 类 号：TN911[电子电信—通信与信息系统]