Título:
Online coordinate descent for adaptive estimation of sparse signals
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Autor:
Angelosante, Daniele
Bazerque, Juan Andrés
Giannakis, Georgios B
Bazerque, Juan Andrés
Giannakis, Georgios B
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Tipo de documento:
Ponencia
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Descriptores:
Sistemas y Control
Año de publicación:
2009
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Resumen:
Two low-complexity sparsity-aware recursive schemes are developed for real-time adaptive signal processing. Both rely on a novel online coordinate descent algorithm which minimizes a time-weighted least-squares cost penalized with the scaled lscr1 norm of the unknown parameters. In addition to computational savings offered when processing time-invariant sparse parameter vectors, both schemes can be used for tracking slowly varying sparse signals. Analysis and preliminary simulations confirm that when the true signal is sparse the proposed estimators converge to a time-weighted least-absolute shrinkage and selection operator, and both outperform sparsity-agnostic recursive least-squares alternatives
Descripción:
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IEEE
EN:
15th Workshop on Statistical Signal Processing, Cardiff, UK, 2009.
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Citación:
Angelosante, D, Bazerque, J, Giannakis, G. “Online coordinate descent for adaptive estimation of sparse signals”. 15Th Workshop on Statistical Signal Processing, Cardiff, UK, 2009.. doi: 10.1109/SSP.2009.5278561
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Licencia:
Licencia Creative Commons Atribución - No Comercial - Sin Derivadas (CC - By-NC-ND 4.0)
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| Ficheros | Descripción | Tamaño | Formato | ||
|---|---|---|---|---|---|
| ABG09.pdf | — | 159.21 KB | Adobe PDF |