Análise de Degradação do Cancelador de Eco Híbrido FIR-IFIR

Abstract

In this paper, we present an analysis of the degradation introduced by the interpolated filter into the FIR-IFIR hybrid echo canceller. Through a joint approach combining interpolated transversal filtering and linearlyconstrained optimization, the optimum filters are determined and a degradation measure, which is a function of the input signal correlation, of the IFIR filter sparseness degree and of the interpolator parameters, is obtained.