Adaptive IIR filtering employing subband decomposition

In this paper, a novel adaptive IIR filter employing subband decomposition is presented, To derive the subband IIR adaptive filter, the subband ARMA model is introduced. Then the subband IIR adaptive filter is proposed. The proposed subband IIR filter employs reduced order adaptive IIR filter in each subband, which can approximate high order adaptive ARMA system. The computer simulations reveal that the convergence performance of the proposed subband IIR filter outperforms the conventional parallel form adaptive IIR filter.