摘要
该文介绍了一种新颖的非线性自适应有源噪声对消器—基于sigmoid函数的Volterra自适应有源噪声对消器,并采用输入信号和瞬时误差归一化的LMS自适应算法调整其系数。这种基于sigmoid函数的Volterra自适应有源噪声对消器具有参数少和便于实现的模快化结构等优点。仿真结果表明:这种基于sigmoid函数的Volterra自适应有源噪声对消系统具有良好的抗噪声性能。
A novel class of nonlinear adaptive active noise cancellation filter-sigmoid-based Volterra, adaptive active noise cancellation filter is introduced. The normalized data and instantaneous error LMS algorithm is modified to update the coefficients of this sigmoid-based Volterra filter. Because the sigmoid-based Volterra adaptive filter, equivalent to second-order Volterra filter, is of the reduced coefficients and modularity, it is applied for adaptive active noise cancellation. Experimental results of adaptive active noise cancellation show that the proposed sigmoid-based Volterra adaptive active noise cancellation filter not only has good anti-noise performance, but also can be easily implemented.
出处
《电子与信息学报》
EI
CSCD
北大核心
2002年第4期461-466,共6页
Journal of Electronics & Information Technology
基金
国家部级基金(批准号:98JS05.4.1.DZ0205)
