도로소음 입력의 ANC시스템에서 실시간 적용의 CLMS 알고리즘의 성능

Abstract

Recently, many active noise control (ANC) systems, which employ the adaptive filter controlling method,have been reported for eliminating unwanted noise. ANC systems based on the filtered-X least mean square (FXLMS)algorithm have a problem with compensating the acoustic feedback of secondary route. It is difficult to apply the realtime, because transfer function of secondary route must be measured by off-line method to solve this problem. In thispaper, we propose the ANC system that applies a correlation LMS(CLMS) algorithm for improving a problem of transferfunction measurement. The proposed algorithm is based on input of road noise. The proposed ANC systems have anadvantage of real-time process without degradation of performance, although there are many calculation compared withFXLMS algorithm.