An optimized online secondary path modeling method for single-channel feedback ANC systems

Davari, Pooya & Hassanpour, Hamid (2009) An optimized online secondary path modeling method for single-channel feedback ANC systems. International Journal of Engineering, 22(1).

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This paper proposes a new method for online secondary path modeling in feedback active noise control (ANC) systems. In practical cases, the secondary path is usually time varying. For these cases, online modeling of secondary path is required to ensure convergence of the system. In literature the secondary path estimation is usually performed offline, prior to online modeling, where in the proposed system there is no need for using offline estimation. The proposed method consists of two steps: a noise controller which is based on an FxLMS algorithm, and a variable step size (VSS) LMS algorithm which is used to adapt the modeling filter with the secondary path. In order to increase performance of the algorithm in a faster convergence and accurate performance, we stop the VSS-LMS algorithm at the optimum point. The results of computer simulation shown in this paper indicate effectiveness of the proposed method.

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ID Code: 59571
Item Type: Journal Article
Refereed: Yes
Keywords: Active Noise Control, Adaptive Filter, Feedback, FxLMS, Online Modelling
ISSN: 1728-1431
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 01 May 2013 22:44
Last Modified: 23 Jul 2013 03:48

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