IMPROVED PARALLEL REALIZATION OF IIR ADAPTIVE FILTERS

A frequency-domain adaptive-filter realisation which uses a parallel a rrangement of real second-order IIR sections and preprocessing based o n a real orthogonal transform is examined. Experimental results and si mulations show that the proposed scheme leads to increased convergence rates and lower computational complexity. The paper also deals with a n efficient technique for optimising the convergence factor for the cl ass of Gauss-Newton algorithms. Some experimental results obtained sho w that this technique leads to a further increase in the rate of conve rgence, to improved robustness of the adaptation algorithm, and to red uced mean-square error.