O Algoritmo LMS no Domínio da Transformada Wavelet Aplicado a Filtros de Volterra

Paúl Bernal, Juraci Galdino, José Apolinário Jr.

DOI: 10.14209/sbrt.2005.771

Evento: XXII Simpósio Brasileiro de Telecomunicações (SBrT2005)

Keywords: Modelamento não-linear Séries de Volterra wavelet Filtros Adaptativos

Abstract

This paper investigates the use of the Least-Mean Square (LMS) Algorithm in the Wavelet transform domain in the scenario of non-linear adaptive filters implemented with truncated Volterra series. Such transformation aims an increase in the speed of convergence of the LMS algorithm, very slow for this particular application, without a proportional increase in the computational complexity. The basic idea behind this approach is the Wavelet special feature of concentrating a higher amount of energy in a few coefficients, making possible a better weighting of the step size as well as a reduction of the coefficient vector order.

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