Now showing items 1-11 of 11

  • A diffusion-based distributed EM algorithm for density estimation in wireless sensor networks 

    Silva Pereira, Silvana; López Valcarce, Roberto; Pagès Zamora, Alba Maria (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    We address the problem of distributed estimation of a parameter from a set of noisy observations collected by a sensor network, assuming that some sensors may be subject to data failures and report only noise. In such ...
  • A diffusion-based em algorithm for distributed estimation in unreliable sensor networks 

    Silva Pereira, Silvana; López Valcarce, Roberto; Pagès Zamora, Alba Maria (2013-01)
    Article
    Restricted access - publisher's policy
    We address the problem of distributed estimation of a parameter from a set of noisy observations collected by a sensor network, assuming that some sensors may be subject to data failures and report only noise. In such ...
  • Consensus for distributed EM-based clustering in WSNs 

    Silva Pereira, Silvana; Barbarossa, Sergio; Pagès Zamora, Alba Maria (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
    Conference lecture
    Open Access
    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 ...
  • Consensus in random WSNs with correlated symmetric links 

    Silva Pereira, Silvana; Pagès Zamora, Alba Maria (2011)
    Conference lecture
    Restricted access - publisher's policy
    In this paper we study the convergence of consensus algorithms in wireless sensor networks with random topologies and instantaneous symmetric links which exist with different probabilities independently in time but correlated ...
  • Distributed consensus algorithms for wireless sensor networks: convergence analysis and optimization 

    Silva Pereira, Silvana (Universitat Politècnica de Catalunya, 2012-01-26)
    Doctoral thesis
    Open Access
  • Distributed Total Least Squares estimation over networks 

    López Valcarce, Roberto; Silva Pereira, Silvana; Pagès Zamora, Alba Maria (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    We consider Total Least Squares (TLS) estimation in a network in which each node has access to a subset of equations of an overdetermined linear system. Previous distributed approaches require that the number of equations ...
  • Fast mean square convergence of consensus algorithms in WSNs with random topologies 

    Silva Pereira, Silvana; Pagès Zamora, Alba Maria (2009)
    Conference lecture
    Open Access
    The average consensus in wireless sensor networks is achieved under assumptions of symmetric or balanced topology at every time instant. However, communication and/or node failures, as well as node mobility or changes in ...
  • How to implement doubly-stochastic matrices for consensus-based distributed algorithms 

    Valcarcel Macua, Sergio; Moreno Leon, Carlos; Samuel Romero, Jhoan; Silva Pereira, Silvana; Zazo Muncharaz, Javier; Pagès Zamora, Alba Maria; López Valcarce, Roberto; Zazo Bello, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    Doubly-stochastic matrices are usually required by consensus-based distributed algorithms. We propose a simple and efficient protocol and present some guidelines for implementing doubly-stochastic combination matrices even ...
  • Mean square convergence of consensus algorithms in random WSNs 

    Silva Pereira, Silvana; Pagès Zamora, Alba Maria (2010-05)
    Article
    Open Access
    Distributed consensus algorithms for estimation of parameters or detection of events in wireless sensor networks have attracted considerable attention in recent years. A necessary condition to achieve a consensus on the ...
  • Randomized transmission power for accelerated consensus in asymmetric WSNs 

    Silva Pereira, Silvana; Pagès Zamora, Alba Maria (2009)
    Conference report
    Open Access
    The total energy consumed in a wireless sensor network until reaching a consensus is proportional to the product of the sum of the transmission power of each node and the convergence time. In a network where the nodes are ...
  • When gossip meets consensus : convergence in correlated random WSNs 

    Silva Pereira, Silvana; Pagès Zamora, Alba Maria (2011)
    Conference report
    Open Access