A BLOCK GRADIENT-BASED ALGORITHM FOR ADAPTIVE IIR FILTERING

This paper presents a new block gradient-based adaptive algorithm for Infinite Impulse Response (IIR) adaptive filters. In contrast with the Recursive Prediction Error (RPE) algorithm, the proposed algorithm em ploys more accurate gradient estimates. The gradients are calculated b ased on sampled data blocks, within which the filter coefficients are kept constant. The proposed approach is characterised by improved stea dy-state performance and reduced computational complexity when compare d with the conventional RPE algorithm.