INVESTIGADORES
REY VEGA Leonardo Javier
artículos
Título:
A New Robust Variable Step-Size NLMS Algorithm
Autor/es:
LEONARDO REY VEGA; HERNÁN REY; JACOB BENESTY; SARA TRESSENS
Revista:
IEEE TRANSACTIONS ON SIGNAL PROCESSING
Editorial:
IEEE
Referencias:
Lugar: New York; Año: 2008 vol. 56 p. 1878 - 1893
ISSN:
1053-587X
Resumen:
A new framework for designing robust adaptive filters is introduced. It is based on the optimization of a certain cost function subject to a time-dependent constraint on the norm of the filter update. Particularly, we present a robust variable step-size NLMS algorithm which optimizes the square of the a posteriori error. We also show the link between the proposed algorithm and another one derived using a robust statistics approach. In addition, a theoretical model for predicting the transient and steady-state behavior and a proof of almost sure filter convergence are provided. The algorithm is then tested in different environments for system identification and acoustic echo cancellation applications.
