Now showing items 21-40 of 53

    • Experimental results for an SDMA mobile communication's antenna array system 

      Goldberg, Jason Matthew; Pagès Zamora, Alba Maria; Lagunas Hernandez, Miguel A.; Rodríguez Fonollosa, Javier; Vázquez Grau, Gregorio (Institute of Electrical and Electronics Engineers (IEEE), 1996)
      Conference report
      Open Access
      This paper presents experimental results for a SpatialDivision Multiple Access cellular mobile communicationssystem. The basestation antenna array testbedused to obtain the results is described in addition tosophisticated ...
    • 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 ...
    • Fourier models for non linear signal processing 

      Pagès Zamora, Alba Maria; Lagunas Hernandez, Miguel A. (1999-12)
      Article
      Restricted access - publisher's policy
      This paper proposes a trigonometric functional extension, hereafter named the Fourier model, as an alternative framework to the Volterra approach for non-linear systems modelling. This work is focused on the general ...
    • Generalization error bounds for kernel matrix completion and extrapolation 

      Giménez Febrer, Pedro Juan; Pagès Zamora, Alba Maria; Giannakis, Georgios B. (2020-01-27)
      Article
      Open Access
      Prior information can be incorporated in matrix completion to improve estimation accuracy and extrapolate the missing entries. Reproducing kernel Hilbert spaces provide tools to leverage the said prior information, and ...
    • High-SNR analytical performance of spatial multiplexing MIMO systems with CSI 

      García Ordoñez, Luis; Palomar, Daniel P.; Pagès Zamora, Alba Maria; Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-11-30)
      Article
      Open Access
      In this paper, we investigate the average and outage performance of spatial multiplexing multiple-input multiple-output (MIMO) systems with channel state information at both sides of the link. Such systems result, for ...
    • HISPANET: a digital television/multimedia payload 

      Sala Álvarez, José; Sergio, Calvo; Pagès Zamora, Alba Maria; Vázquez Grau, Gregorio; Riba Sagarra, Jaume (European Spatial Agengy (ESA), 1998)
      Conference report
      Open Access
    • 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 ...
    • Joint probability density function estimation by spectral estimate methods 

      Pagès Zamora, Alba Maria; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 1996)
      Conference report
      Open Access
      The estimation of probability density functions (PDFs) of a given random variable (r.v.) is involved in topics related to codification, speech or whenever a short record of data is available but a greater amount is needed. ...
    • Learning from unequally reliable blind ensembles of classifiers 

      Traganitis, Panagiotis; Pagès Zamora, Alba Maria; Giannakis, Georgios B. (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Open Access
      The rising interest in pattern recognition and data analytics has spurred the development of a plethora of machine learning algorithms and tools. However, as each algorithm has its strengths and weaknesses, one is motivated ...
    • Matrix completion and extrapolation via kernel regression 

      Giménez Febrer, Pedro Juan; Pagès Zamora, Alba Maria; Giannakis, Georgios B. (2019-10-01)
      Article
      Open Access
      Matrix completion and extrapolation (MCEX) are dealt with here over reproducing kernel Hilbert spaces (RKHSs) in order to account for prior information present in the available data. Aiming at a fast and low-complexity ...
    • Matrix completion of noisy graph signals via proximal gradient minimization 

      Giménez Febrer, Pedro Juan; Pagès Zamora, Alba Maria (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference lecture
      Open Access
      This paper takes on the problem of recovering the missing entries of an incomplete matrix, which is known as matrix completion, when the columns of the matrix are signals that lie on a graph and the available observations ...
    • 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 ...
    • Memoryless predistortion of nonlinear amplifiers based on Fourier series based models 

      Pagès Zamora, Alba Maria; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 1996)
      Conference report
      Open Access
      In order to maximise the efficiency of the RF amplifier located in a transmitter, for instance in both analog and digital terrestrial TV links, it is forced to work near saturation thus introducing an undesirable nonlinear ...
    • Muestreo aleatorio en frecuencia aplicado a la identificación de sistemas no lineales 

      Pagès Zamora, Alba Maria; Nájar Martón, Montserrat; Pérez Neira, Ana Isabel (Universidad de Valencia, 1994)
      Conference report
      Open Access
    • Muestreo aleatorio en frecuencia aplicado a la identificación de sistemas no lineales 

      Pagès Zamora, Alba Maria; Nájar Martón, Montserrat; Pérez Neira, Ana Isabel (Universitat Politècnica de València, 1993)
      Conference report
      Open Access
    • Multitone tracking with coupled EKFs and high order learning 

      Lagunas Hernandez, Miguel A.; Pagès Zamora, Alba Maria (1992)
      Conference report
      Open Access
      A multitone tracker is described using two basic principles in optimum frequency estimation: processing bandwidth depending on the distance from the estimate to the actual frequency values, and parallel estimates with ...
    • Nonlinear system inversion applied to random variable generation 

      Pagès Zamora, Alba Maria; Lagunas Hernandez, Miguel A.; Mestre Pons, Francesc X. (Institute of Electrical and Electronics Engineers (IEEE), 2000)
      Conference report
      Open Access
      A method to design random variable (RV) generators with the same probability density function (PDF) as a given RV record is presented. The resulting RV generator is a nonlinear system that when driven by a uniformly ...
    • Online EM-based distributed estimation in sensor networks with faulty nodes 

      Giménez Febrer, Pedro Juan; Pagès Zamora, Alba Maria; López Valcarce, Roberto (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference lecture
      Restricted access - publisher's policy
      This paper focuses on the problem of the distributed estimation of a parameter vector based on noisy observations regularly acquired by the nodes of a wireless sensor network and assuming that some of the nodes have faulty ...
    • Parameter estimation in wireless sensor networks with faulty transducers: a distributed EM approach 

      Silva Pereira, Silvana; López Valcarce, Roberto; Pagès Zamora, Alba Maria (2018-03-01)
      Article
      Open Access
      We address the problem of distributed estimation of a vector-valued parameter performed by a wireless sensor network in the presence of noisy observations which may be unreliable due to faulty transducers. The proposed ...
    • 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 ...