Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1996.07b
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- Pages.1327-1329
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- 1996
Performance improvement of active noise control using orthogonalization property of Walsh transform
월쉬 변환의 직교화 특성을 이용한 능동 소음제어의 성능 향상
- Ahn, Doo-Soo (Dept. of Electrical Eng., Sung Kyun Kwan Univ.) ;
- Kim, Jong-Boo (Dept. of Electronics, In Duk Jr. College) ;
- Choi, Seung-Uk (Dept. of Electrical Eng., Sung Kyun Kwan Univ.) ;
- Yim, Kook-Hyun (R&D Center, Tae San Precision Co. Ltd.)
- Published : 1996.07.22
Abstract
This paper presents an active noise control (ANC) algorithm using orthogonalization property of Walsh transform. Conventional ANC algorithm known as filtered-x LMS(FXL) algorithm has a problem of decreasing convergence speed in FIR adaptive filters operating in colored noise environments. Walsh transform decompose an input signal into a set of N uncorrelated components and reduce eigenvalue spread of autocorrelation matrix of input sequences. Computer simulations show that proposed (FXW) algorithm is superier to FXL in convergence speed.
Keywords