Online secondary-path-modeling ANC system with simultaneous perturbation method
Online secondary-path-modeling ANC system with simultaneous perturbation method
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DOI：
10.1109/apsipa.2016.7820891
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发表时间：
2016-12
期刊：
影响因子：
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通讯作者：
Takahiro Shimizu;Y. Kajikawa
中科院分区：
文献类型：
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作者：
Takahiro Shimizu;Y. Kajikawa
本文提出了一种基于同时扰动法的在线二次路径建模ANC系统。该系统采用FXNLMS算法对噪声控制滤波器进行更新，在次级路径模型的建模误差较小的情况下，该算法具有较快的收敛速度。如果次级路径发生变化，则通过SP方法更新噪声控制滤波器，该方法不需要次级路径模型，仅利用在误差麦克风处获得的误差信号，并且使用SP方法中的扰动分量进行在线次级路径建模。当次级路径的建模完成时，应用FXNLMS算法通过再次使用更新的次级路径模型来更新噪声控制滤波器。因此，所提出的在线次级路径建模ANC系统可以补偿基于SP方法的次级路径变化的FXNLMS算法的缺点。
In this paper, we propose an online secondary-path-modeling ANC system with simultaneous perturbation (SP) method. This system updates the noise control filter by the FXNLMS algorithm, which has fast convergence in the case when the modeling error of the secondary path model is small. If the secondary path changes, the noise control filter is updated by the SP method, which does not require the secondary path model and only utilizes the error signal obtained at the error microphone, and the online secondary path modeling is conducted using the perturbation components in the SP method. When the modeling of the secondary path is finished, the FXNLMS algorithm is applied to update the noise control filter by using the updated secondary path model again. Thus, the proposed online secondary-path-modeling ANC system can compensate the disadvantage of the FXNLMS algorithm for the secondary path changes based on the SP method.