Effect of pole-radius in a piloted adaptive notch filter

Abstract

In this paper, we have presented a detailed analysis of pole position approximation for pilot notches to understand its overall effect on steering direction determination and convergence of the notch filter. We have introduced an improved piloted adaptive notch filter with transient suppression and a higher probability of correct steering direction. The concept of variable pole-radius has been employed to significantly reduce the transient effect and improving the directional properties of the notch. Computer simulations demonstrate the excellent performance of the variable-pole radius piloted notch filter to significantly outperform the traditional piloted notch filter with respect to the speed of convergence and steady-state mean square error (MSE).