In this paper, we examine the effectiveness of an active noise control (ANC) system with period aware linear prediction (PALP) method and simplified PALP (SPALP) method for MR noise. The PALP method expanding ordinary linear prediction method using delayed signal has high prediction accuracy for periodic signal. We have attempted to apply the ANC system with the PALP method for reducing MR noise which has high periodicity. However PALP method requires two adaptive filters and delay device. Thus the PALP method requires large memory size and computational complexity. For this reason, we simplify the PALP method by removing one adaptive filter with undelayed signal. Simulation results demonstrate that the feedback ANC system with the SPALP method has the same noise reduction performance as the PALP method while saving the computational complexity.
['Hitoshi Sawano', 'Yoshinobu Kajikawa']
Active noise control systems with simplified period aware linear prediction method for MR noise