Browsing by Author "Shih, Chia-Sheng"

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Fast Converging Nonlinear Echo Cancellation Based On Optimum Step Size
(2009)
Shih, Chia-Sheng
;
Hsieh, Shih-Fu
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
Adaptive Volterra filter is generally known to track nonlinear echo path at slow convergence rate. An optimum time- and tap- variant step-size for second-order Volterra filter is proposed to speed up its convergence rate. The step-size is derived based on the MMSE criterion. As the optimum step-size needs to know the real echo path coefficient, an exponential echo-path model is proposed for practical implementations. Computer simulations are provided to validate the proposed algorithms.