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Title:
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Consensus for distributed EM-based clustering in WSNs
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Author:
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Silva Pereira, Silvana; Barbarossa, Sergio; Pagès Zamora, Alba Maria
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions |
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Abstract:
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A distributed EM algorithm with consensus is proposed for density estimation and clustering using WSNs in the presence of mixtures of Gaussians. The EM algorithm is a general framework for maximum likelihood estimation in hidden variable models, usually implemented in a central node with global information of the network. The average consensus algorithm is a simple robust scheme for computing averages in a distributed manner. In this contribution, we run a distributed EM algorithm where the nodes obtain global knowledge of the statistics through consensus with local information exchange only in a WSN with
instantaneous random links. Starting from a set of initial values, the nodes are able to compute the complete statistics of a mixture
of Gaussians and classify into clusters according to the sensed density using a simple decision rule. A trade off between power consumption and final accuracy of the estimates is established through simulations. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Processament del senyal::Processament del senyal en les telecomunicacions
-Underwater acoustic telemetry
-MIMO radar
-Radio networks
-Signal processing
-Processament del senyal |
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Rights:
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Document type:
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Article - Published version
Conference Object |
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Published by:
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IEEE Press. Institute of Electrical and Electronics Engineers
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