A new adaptive strategy to improve online secondary path modeling in active noise control systems using fractional signal processing approach精品.pdfVIP

Signal Processing 107 (2015) 433–443 Contents lists available at ScienceDirect Signal Processing journal homepage: /locate/sigpro A new adaptive strategy to improve online secondary path modeling in active noise control systems using fractional signal processing approach Muhammad Saeed Aslam a, Muhammad Asif Zahoor Raja b,n a Pakistan Institute of Engineering and Applied Sciences, Islamabad, Pakistan b COMSATS Institute of Information Technology, Attock Campus, Attock, Pakistan a r t i c l e i n f o a b s t r a c t Article history: In this paper, a new adaptive strategy based on fractional signal processing is proposed Received 31 December 2013 using multi-directional step size fractional least mean square algorithm for online Received in revised form secondary path modeling, which is a fundamental problem in practical active noise 6 April 2014 control systems, as opposed to the generally-employed increasing step size strategy that Accepted 7 April 2014 compromises model accuracy for faster convergence. The design approach presents step Available online 18 April 2014 size strategy in relation with disturbance signal in the desired response of modeling filter Keywords: which is not available directly so an indirect approach is used to track its variations. Modified filtered-x least mean square Comparative results for narrowband and broadb