05915737

j

05915737 Tabatabaei Ardekani, I. Abdulla, W.H. On the convergence of real-time active noise control systems. Signal Process. 91, No. 5, 1262-1274 (2011). 2011 Elsevier Science, Amsterdam EN active noise control fxLMS algorithm acoustic duct real time implementation

doi:10.1016/j.sigpro.2010.12.012

Summary: Available convergence analyses of adaptive active noise control systems apply to only theoretical cases with broad-band white noise or pure delay secondary paths. In order to investigate convergence behaviors of these systems in more practical conditions, this paper conducts a new convergence analysis for filtered-x LMS-based active noise control systems with band-limited white noise and moving average secondary paths. A linear model for the adaptation process is developed. Based on this model, the upper-bound of the adaptation step-size is derived. Also, the adaptation step-size leading to the fastest convergence rate is derived. In addition to the computer simulation, a fully implemented real time active noise control system is used to verify the validity of the analytical results.