dc.contributor.authorWang, Yuan
dc.contributor.authorTay, Wee Peng
dc.contributor.authorHu, Wuhua
dc.identifier.citationWang, Y., Tay, W. P., & Hu, W. (2017). A Multitask Diffusion Strategy With Optimized Inter-cluster Cooperation. IEEE Journal of Selected Topics in Signal Processing, 11(3), 504-517.en_US
dc.description.abstractWe consider a multitask estimation problem where nodes in a network are divided into several connected clusters, with each cluster performing a least-mean-squares estimation of a different random parameter vector. Inspired by the adapt-then-combine diffusion strategy, we propose a multitask diffusion strategy whose mean stability can be ensured whenever individual nodes are stable in the mean, regardless of the inter-cluster cooperation weights. In addition, the proposed strategy is able to achieve an asymptotically unbiased estimation when the parameters have same mean. We also develop an inter-cluster cooperation weights selection scheme that allows each node in the network to locally optimize its inter-cluster cooperation weights. Numerical results demonstrate that our approach leads to a lower average steady-state network mean-square deviation, compared with using weights selected by various other commonly adopted methods in the literature.en_US
dc.description.sponsorshipNRF (Natl Research Foundation, S’pore)en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.format.extent14 p.en_US
dc.relation.ispartofseriesIEEE Journal of Selected Topics in Signal Processingen_US
dc.rights© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [http://dx.doi.org/10.1109/JSTSP.2017.2679339].en_US
dc.subjectDistributed estimationen_US
dc.subjectDiffusion strategyen_US
dc.subjectDRNTU::Engineering::Electrical and electronic engineering
dc.titleA Multitask Diffusion Strategy With Optimized Inter-cluster Cooperationen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.description.versionAccepted versionen_US

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