적응 IIR 대역 통과 필터와 적응 신호 발생 회로의 설계에 관한 연구

A Study on the Designs of the Adaptive IIR Band Pass Filter and the Adaptive Signal Generator

In this paper, digital adaptive IIR band pass filter and its corresponding adaptive signal generation circuit are derived based on pole angle, center frequency, pole radius and angle and pole radius and center frequency, respectively. In order to avoid divergence of an applied system, adaptive parameter update algorithm was obtained by multiplying three terms, which are output from the adaptive filter, output from adaptive signal and constant. An effect of the constant was observed through a normalized distribution of an output noise from the adaptive signal generation circuit for the band pass filter. A criteria generated from the graphical comparison of the derived noise distribution and its computer simulation result is used for selecting the constant which keeps from a system divergence. Therefore, this criteria is suggested for design of the digital adaptive IIR band pass filter, which stabilizes a given system.