Recent Submissions

  • Decentralized coordinated precoding for dense TDD small cell networks 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2015-08-01)
    Article
    Open Access
    Cellular networks need the densification of small eNBs (SeNBs) to face the tremendous data traffic demand growth, implying an interference increase and making transmit coordination a key enabler. This article proposes a ...
  • Optimization of radio and computational resources for energy efficiency in latency-constrained application offloading 

    Muñoz Medina, Olga; Pascual Iserte, Antonio; Vidal Manzano, José (2015-10)
    Article
    Open Access
    Providing femto access points (FAPs) with computational capabilities will allow (either total or partial) offloading of highly demanding applications from smartphones to the so-called femto-cloud. Such offloading promises ...
  • On the performance of Hadamard ratio detector-based spectrum sensing for cognitive radios 

    Sedighi, Saeid; Taherpour, Abbas; Sala Álvarez, José; Khattab, Tamer (2015-07-15)
    Article
    Open Access
    We consider the problem of multiantenna spectrum sensing (SS) in cognitive radios (CRs) when the receivers are assumed to be uncalibrated across the antennas. The performance of the Hadamard Ratio Detector (HRD) is analyzed ...
  • Nonuniform sampling walls in wideband signal detection 

    Font Segura, Josep; Vázquez Grau, Gregorio; Riba Sagarra, Jaume (2014-01-01)
    Article
    Open Access
    This work shows the existence of sampling walls in detection of wideband signals from Bernoulli nonuniform sampling (BNS) in the presence of noise uncertainty. A sampling wall is defined as the sampling density below which ...
  • The DoF of the 3-User (p, p+1) MIMO Interference Channel 

    Torrellas Socastro, Marc; Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga (2014-11-01)
    Article
    Restricted access - publisher's policy
    The degrees of freedom (DoF) of the 3-user multiple-input multiple-output (MIMO) interference channel (IC) with full channel state information and constant channel coefficients are investigated when (p, p + 1) antennas are ...
  • Single and multi-frequency wideband spectrum sensing with side-information 

    Font Segura, Josep; Vázquez Grau, Gregorio; Riba Sagarra, Jaume (2014-10-01)
    Article
    Restricted access - publisher's policy
    This study addresses the optimal spectrum sensing detection based on the complete or partial side-information on the signal and noise statistics. The use of the generalised-likelihood ratio test (GLRT) involves maximum-likelihood ...
  • Asymptotically optimal linear shrinkage of sample LMMSE and MVDR filters 

    Serra, Jordi; Nájar Martón, Montserrat (2014-07-15)
    Article
    Restricted access - publisher's policy
    Conventional implementations of the linearminimum mean-square (LMMSE) and minimum variance distortionless response (MVDR) estimators rely on the sample matrix inversion (SMI) technique, i.e., on the sample covariance matrix ...
  • Pattern matching for building feature extraction 

    Lagunas Targarona, Eva; Amin, Moeness G.; Ahmad, Fauzia; Nájar Martón, Montserrat (2014-12-01)
    Article
    Restricted access - publisher's policy
    We address the problem of detecting building dominant scatterers using a reduced number of measurements with applications to through-the-wall radar (TWR) and urban sensing. We consider oblique illumination, which specially ...
  • Energy-aware broadcast multiuser-MIMO precoder design with imperfect channel and battery knowledge 

    Rubio López, Javier; Pascual Iserte, Antonio (2014-06)
    Article
    Restricted access - publisher's policy
    This paper addresses the problem of resource allocation and precoder design in a multiuser MIMO broadcast system where the terminals are battery-powered devices provided with energy harvesting capabilities. Energy harvesting ...
  • A rate-splitting approach to fading channels with imperfect channel-state information 

    Pastore, Adriano; Koch, Tobias; Rodríguez Fonollosa, Javier (2014-07)
    Article
    Restricted access - publisher's policy
    As shown by Médard, the capacity of fading channels with imperfect channel-state information can be lower-bounded by assuming a Gaussian channel input X with power P and by upper-bounding the conditional entropy h(X|Y,H) ...

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