A variable step-size FxLMS algorithm for feedforward active noise control systems based on a new online secondary path modelling technique
Davari, Pooya & Hassanpour, Hamid (2008) A variable step-size FxLMS algorithm for feedforward active noise control systems based on a new online secondary path modelling technique. In IEEE/ACS International Conference on Computer Systems and Applications (AICCSA 2008), 31 March - 4 April 2008, Doha, Qatar.
Several approaches have been introduced in literature for active noise control (ANC) systems. Since FxLMS algorithm appears to be the best choice as a controller filter, researchers tend to improve performance of ANC systems by enhancing and modifying this algorithm. This paper proposes a new version of FxLMS algorithm. In many ANC applications an online secondary path modelling method using a white noise as a training signal is required to ensure convergence of the system. This paper also proposes a new approach for online secondary path modelling in feedfoward ANC systems. The proposed algorithm stops injection of the white noise at the optimum point and reactivate the injection during the operation, if needed, to maintain performance of the system. Benefiting new version of FxLMS algorithm and not continually injection of white noise makes the system more desirable and improves the noise attenuation performance. Comparative simulation results indicate effectiveness of the proposed approach.
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|Item Type:||Conference Paper|
|Keywords:||Active Noise Control, FxLMS, Online Modelling|
|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:||05 May 2013 22:28|
|Last Modified:||26 Jul 2013 03:00|
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