基于状态参数调整的多速率自适应算法  

Algorithm for multi-rate adaptive filter based on coefficients updated

作　　者：董航[1] 孙洪[1] 

机构地区：[1]武汉大学电子信息学院信号处理研究室,湖北武汉430079

出　　处：《系统工程与电子技术》2008年第4期735-738,共4页Systems Engineering and Electronics

基　　金：国家自然科学基金资助课题(60372057)

摘　　要：通过对实际应用环境的分析,提出一种新的动态改变自适应滤波器权系数更新速率的算法。该算法在权系数的更新速率与误差信号之间建立一种非线性函数关系,具有在环境突变阶段,滤波器系数的更新速率自动变快,而在稳态阶段更新速率很慢的特点,可以极大的降低自适应滤波器的运算量。理论分析和计算机仿真结果表明该算法具有良好的收敛性能和跟踪性能,稳态误差的水平与传统算法保持一致。By analyzing the actual room acoustic environments, a novel algorithm which can dynamically change the coefficients update-rate of the adaptive filter is presented. This algorithm builds a nonlinear function relationship between update-rate and the error signal. The update-rate of the coefficients increase automatically when the environment varies, and it would be smaller in the stable state, which can lead to a significant reduction in the computational burden. Theoretical analysis and computer simulations indicate that the convergence and tracking properties of this algorithm is better while it does not more errors than the traditional algorithms.

关 键 词：更新速率 权系数 自适应滤波器 运算量 

分 类 号：TN911.72[电子电信—通信与信息系统]