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Multitask Diffusion Adaptation Over Networks
Jie Chen ; Richard, Cedric ; Sayed, Ali H.
IEEE transactions on signal processing, 2014-08, Vol.62 (16), p.4129-4144
[Periódico revisado por pares]
New York, NY: IEEE
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Título:
Multitask Diffusion Adaptation Over Networks
Autor:
Jie Chen
;
Richard, Cedric
;
Sayed, Ali H.
Assuntos:
Adaptive systems
;
Algorithms
;
Applied sciences
;
Asymmetric regularization
;
Collaboration
;
collaborative processing
;
data unmixing
;
Detection, estimation, filtering, equalization, prediction
;
Diffusion
;
diffusion strategy
;
distributed optimization
;
Estimation
;
Exact sciences and
technology
;
Indexes
;
Inference
;
Information, signal and communications theory
;
Mathematical analysis
;
Mean square error methods
;
Mean square errors
;
multitask learning
;
Networks
;
Optimization
;
Signal and communications theory
;
Signal, noise
;
Strategy
;
target localization
;
Telecommunications and information theory
;
Vectors
;
Vectors (mathematics)
É parte de:
IEEE transactions on signal processing, 2014-08, Vol.62 (16), p.4129-4144
Notas:
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição:
Adaptive networks are suitable for decentralized inference tasks. Recent works have intensively studied distributed optimization problems in the case where the nodes have to estimate a single optimum parameter vector collaboratively. However, there are many important applications that are multitask-oriented in the sense that there are multiple optimum parameter vectors to be inferred simultaneously, in a collaborative manner, over the area covered by the network. In this paper, we employ diffusion strategies to develop distributed algorithms that address multitask problems by minimizing an appropriate mean-square error criterion with l2-regularization. The stability and performance of the algorithm in the mean and mean-square error sense are analyzed. Simulations are conducted to verify the theoretical findings, and to illustrate how the distributed strategy can be used in several useful applications related to target localization and hyperspectral data unmixing.
Editor:
New York, NY: IEEE
Idioma:
Inglês
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