An ANC algorithm based on an adjustable phase shifter without secondary path modeling

摘要

The ANC (active noise control) algorithm always suffers from an auxiliary modelling process with adaptive filtering. One type of perturbation based algorithm applies a phase response on the reference signal in each frequency bin instead of the estimation of the secondary path. However, the values of the potential phases angles are fixed which limits the convergence performance of the ANC system. In this paper, we propose an active noise control's algorithm based on the method in which the phase shifter for the reference signal can be adjusted according to the results of the signal monitoring. Compared with the other algorithms of this type, the proposed algorithm has a superiority in convergence performance, which is proved by simulation results.