| Texto completo | |
| Autor(es): |
Fernandez-Bes, Jesus
[1]
;
Azpicueta-Ruiz, Luis A.
[1]
;
Arenas-Garcia, Jeronimo
[1]
;
Silva, Magno T. M.
[2]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Carlos III Madrid, Dept Signal Theory & Commun, Leganes 28911 - Spain
[2] Univ Sao Paulo, Escola Politecn, Dept Elect Syst Engn, BR-05508010 Sao Paulo - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | DIGITAL SIGNAL PROCESSING; v. 36, p. 1-14, JAN 2015. |
| Citações Web of Science: | 11 |
| Resumo | |
We propose a diffusion scheme for adaptive networks, where each node obtains an estimate of a common unknown parameter vector by combining a local estimate with the combined estimates received from neighboring nodes. The combination weights are adapted in order to minimize the mean-square error of the network employing a local least-squares (LS) cost function. This adaptive diffusion network with LS combiners (ADN-LS) is analyzed, deriving expressions for its network mean-square deviation that characterize the convergence and steady-state performance of the algorithm. Experiments carried out in stationary and tracking scenarios show that our proposal outperforms a state-of-art scheme for adapting the weights of diffusion networks (ACW algorithm from {[}10], both during convergence and in tracking situations. Despite its good convergence behavior, our proposal may present a slightly worse steady-state performance in stationary or slowly-changing scenarios with respect to ACW due to the error inherent to the least-squares adaptation with sliding window. Therefore, to take advantage of these different behaviors, we also propose a hybrid scheme based on a convex combination of the ADN-LS and ACW algorithms. (C) 2014 Elsevier Inc. All rights reserved. (AU) | |
| Processo FAPESP: | 13/18041-5 - Combinação de algoritmos adaptativos e filtragem adaptativa distribuída aplicadas à acústica |
| Beneficiário: | Magno Teófilo Madeira da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisador Visitante - Internacional |
| Processo FAPESP: | 12/24835-1 - Algoritmos adaptativos, combinações e aplicações em desconvolução |
| Beneficiário: | Magno Teófilo Madeira da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |