A study on the improvement of the convergence speed of cascaded adaptive notch filter utilizing allpass filter

摘要

A cascaded second order adaptive notch filters implemented using an allpass filter, for elimination of multiple sinusoids, has been proposed. A range of the step size that the adaptive algorism operates stably is already clarified. However, a convergence speed is not necessarily fast. In this paper, we propose a method of controlling the amplitude of the pole of the transfer function for improving a convergence speed.