Proceedings of the Korean Institute of Communication Sciences Conference (한국통신학회:학술대회논문집)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A Study on the New Adaptive Notch Filter Based on All Pass Filter

All Pass Filter를 이용한 새로운 적응노치필터에 관한 연구

  • 양윤기 (서울대학교 공과대학 제어계측공학과 신호처리연구실) ;
  • 이상욱 (서울대학교 공과대학 제어계측공학과 신호처리연구실)
  • Published : 1991.10.01

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Abstract

In this paper, a new adaptive IIR notch filter employing all pass filter is proposed. Proposed all pass filter is composed of all pole and all zero sections, each of which utilizes modulation lattice filter [11]. And, adaption algorithm for proposed notch filter is also derived. In addition, the error surface for proposed IIR adaptive notch filter is analyzed. Computer simulation results reveal that the proposed adaptation algorithm works well for low SNR(signal to noise ratio) single and multiple sinusoids. And it is shown that for estimation time varying frequency, the parameter which is related to notch bandwidth is important than any other parameters.

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