A Robust Adaptive Notch Filter for Broadband Signal and Its Application

Abstract

The adaptive notch filter that is composed of the exponential type all-pass circuit has the stable and the robust characteristics for the broadband signal. In this paper, a method to reduce the degree and the constant delay of the adaptive filter and a adaptive algorithm using the window function are presented. The application to the narrowband signal canceling in the speech signal, the sound noise canceling and the howling signal canceling are also presented.