Analysis of the adaptive filter algorithm for feedback-type active noise control
Analysis of the adaptive filter algorithm for feedback-type active noise control
复制标题
反馈型有源噪声控制自适应滤波器算法分析
DOI：
10.1109/icassp.2001.940681
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
S. Miyagi
中科院分区：
文献类型：
--
作者：
H. Sakai;S. Miyagi
反馈型主动噪声控制（ANC）系统仅使用一个传声器来提供调整自适应滤波器所需的信号。由于整个自适应滤波器结构的复杂性，目前还没有关于其收敛性的理论结果。首先利用平均法和频域技术相结合的方法得到滤波- x LMS自适应滤波器的平稳点；然后导出了局部收敛条件。这是众所周知的前馈型ANC的90/spl度/条件的对应。最后通过一个简单的算例给出了收敛条件，并通过仿真验证了其有效性。
The feedback-type active noise control (ANC) system uses only one microphone to provide necessary signals for adjusting the adaptive filter. Due to the complicated nature of the whole adaptive filter structure there have been no theoretical results about its convergence properties. First a stationary point of the adaptive filter using the filtered-X LMS algorithm is obtained by the averaging method combined with the frequency domain technique. Then the local convergence condition is derived. This is a counterpart of the well-known 90/spl deg/ condition for the feedforward-type ANC. Finally, the convergence condition is explicitly given for a simple example and its validity is shown by some simulations.