온라인 2차경로 모델링을 위한 파워 스케쥴링과 VSS-NLMS 알고리즘을 이용한 다채널 능동소음제어

Abstract

In active noise control (ANC) systems, some filtered-x least mean square (FXLMS) algorithms with additive random noise based online secondary path modeling (OSPM) have been often applied. However, the random noise signal can contribute to the residual noise. In this paper, a multi-channel active noise control (ANC) system with noise power scheduling for OSPM is proposed. The proposed method not only controls the power of the additive random noise based on the convergence status of the OSPM filter, but also employs the OSPM filter with a variable step-size normalized LMS (VSS-NLMS) algorithm to reduce the residual noise. Simulation results demonstrate the effectiveness of the proposed method.