| 講演抄録／キーワード |
| 講演名 |
2005-06-27 10:20
A Technique for Active Noise Control Systems with Online Secondary Path Modeling Using Additive Noise Power Scheduling
○Muhammad Tahir Akhtar・Masahide Abe・Masayuki Kawamata（Tohoku Univ.） |
| 抄録 |
（和） |
This paper proposes a new method for active noise control (ANC) systems with online secondary path modeling. Here the control filter is adapted by using same error signal as used in the adaptation of the modeling filter. The modeling filter is adapted using a variable step size (VSS) LMS algorithm already proposed by authors. Furthermore, the modeling filter is excited by an additive random noise with variable power. The basic idea of VSS and varying noise power stems from the fact that the disturbance signal in the desired response of the modeling filter is decreasing in nature, (ideally) converging to zero. Initially, when the disturbance signal is large, a small step size and large additive noise are used in the modeling filter. Later, when ANC system converges, step size is increased and the variance of the additive random noise is decreased. The computer simulations show that the proposed method gives best performance among the existing methods. |
| （英） |
This paper proposes a new method for active noise control (ANC) systems with online secondary path modeling. Here the control filter is adapted by using same error signal as used in the adaptation of the modeling filter. The modeling filter is adapted using a variable step size (VSS) LMS algorithm already proposed by authors. Furthermore, the modeling filter is excited by an additive random noise with variable power. The basic idea of VSS and varying noise power stems from the fact that the disturbance signal in the desired response of the modeling filter is decreasing in nature, (ideally) converging to zero. Initially, when the disturbance signal is large, a small step size and large additive noise are used in the modeling filter. Later, when ANC system converges, step size is increased and the variance of the additive random noise is decreased. The computer simulations show that the proposed method gives best performance among the existing methods. |
| キーワード |
（和） |
active noise control / FxLMS algorithm / online secondary path modeling / variable step size / noise power scheduling / / / |
| （英） |
active noise control / FxLMS algorithm / online secondary path modeling / variable step size / noise power scheduling / / / |
| 文献情報 |
信学技報, vol. 105, no. 149, SIP2005-27, pp. 13-18, 2005年6月. |
| 資料番号 |
SIP2005-27 |
| 発行日 |
2005-06-20 (CAS, VLD, SIP) |
| ISSN |
Print edition: ISSN 0913-5685 |
| PDFダウンロード |
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