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# 基于可变步长的多通道主动噪声控制算法

0   引言

1   控制算法

1.1

1.2 多通道可变步长

MIMO 滤波-x LMS 算法是应用最为广泛的噪声控制算法，系统框图如图1 所示。设系统中有I 个参考传感器，J 个次级扬声器，K 个误差传感器。IJ 个器采用横向滤波器，其长度为L，滤波器权系数采用矢量形式统一表示为W(z)。Hp(z) 代表IK 个初级通路的传递函数，Hs(z) 代表JK 个次级通路的传递函数，Hs`(z) 是次级通路传递函数的估计值。初级通路和次级通路等效为FIR 滤波器，假设其长度分别为Lp 和Ls。

w(n +1) = w(n)−2μr(n)e(n)   （10）

2   仿真实验

2.1 单通道算法性能

2.2 多通道区域降噪实现

3   结语

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