도로환경 정온화의 실시간 적용을 위한 Co-LMS 알고리즘의 특성 고찰

Abstract

The active noise control(ANC) method for noise problems solution generally uses filtered-X LMS algorithms. However, Filtered-X LMS algorithms were mainly used but these had a limitation that had to measure a transferfunction of secondary noise path. However, newly proposed correlation-LMS algorithms have slightly much calculationand are minutely behind performance, these have a advantage not in measuring transfer function onerously so that wecan easily adapt these in real time. Thus Co-LMS algorithm was developed to improve the real-time implementationperformance under the variable input noise such as road noise environment. In this paper, the performance of theCo-LMS is presented in comparison with that of the Filtered-X LMS algorithm. Simulation results show that activenoise control using Co-LMS have slightly much calculation and are minutely behind performance, these have a advantagenot in measuring transfer function onerously so that we can easily adapt these in real time.