A complete parallel narrowband active noise control system based on residual error separation using variable leaky LMS

In this paper, a residual error separation (RES) scheme using variable leakage LMS algorithm is proposed for a complete parallel narrowband active noise control (ANC, NANC) system. The RES subsystem is dedicated to separating individual sinusoid being targeted from the residual noise. Each separated sinusoid, instead of the whole residual noise, is used to update the corresponding control filter weights, which may significantly improve the overall performance of the system. A variable leakage (VL) LMS (VL-LMS) algorithm is developed for the RES subsystem to maintain its stability and to improve the system performance. Extensive simulations are provided to confirm the superiority of the proposed NANC system.