Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1995.07b
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- Pages.758-760
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- 1995
A Design of Adaptive Noise Canceller via Walsh Transform
Walsh변환에 의한 적응 잡음제거기의 설계
- Ahn, Doo-Soo (Dept. of Electrical Engineering, Sungkyunkwan Univ.) ;
- Kim, Jong-Boo (Dept. of Electronic Engineering, Induk Junior college) ;
- Choi, Seung-Wook (The 1st Research Institute of LG Industrial system Co. Ltd.) ;
- Lee, Tae-Pyo (The research institute of Hyundai motor company)
- Published : 1995.07.20
Abstract
The purpose of noise cancellation is to estimating signals corrupted by additive noise or interference. In this paper, an adaptive noise canceller is built from a Walsh filter with a new adaptive algorithm. The Walsh filter consists of a Walsh function. Since the Walsh functions are either even or odd functions, the covariance matrix in the tap gain adjustment algorithm can be reduced to a simple form. In this paper, minimization of the mean squre error is accomplished by a proposed adaptive algorithm. The conventional adaptation techniques use a fixed time constant convergence factor by trial and error methods. In this paper, a convergence factor is obtained that is tailored for each adaptive filter coefficient and is updated at each block iteration.
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