Now showing items 1-5 of 5

  • 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 ...
  • 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 ...
  • 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 ...
  • Multiantenna spectrum sensing exploiting spectral a priori information 

    Vázquez Vilar, Gonzalo; López Valcarce, Roberto; Sala Álvarez, José (2011-12)
    Article
    Restricted access - publisher's policy
    Dynamic Spectrum Access (DSA) is receiving considerable interest as a means to improve spectral usage in licensed bands. In order to avoid interference to licensed users, spectrum sensing has emerged as an enabling technology ...
  • Multiantenna spectrum sensing for cognitive radio: overcoming noise uncertainty 

    López Valcarce, Roberto; Vázquez Vilar, Gonzalo; Sala Álvarez, José (2010)
    Conference report
    Open Access
    Spectrum sensing is a key ingredient of the dynamic spectrum access paradigm, but it needs powerful detectors operating at SNRs well below the decodability levels of primary signals. Noise uncertainty poses a significant ...