Recent Submissions

  • 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) ...
  • Noncooperative day-ahead bidding strategies for demand-side expected cost minimization with real-time adjustments: a GNEP approach 

    Atzeni, Italo; García Ordoñez, Luis; Scutari, Gesualdo; Palomar, Daniel P.; Rodríguez Fonollosa, Javier (2014-05-01)
    Article
    Restricted access - publisher's policy
    The envisioned smart grid aims at improving the interaction between the supply-and the demand-side of the electricity network, creating unprecedented possibilities for optimizing the energy usage at different levels of the ...
  • Frequency-domain GLR detection of a second-order cyclostationary signal over fading channels 

    Riba Sagarra, Jaume; Font Segura, Josep; Villares Piera, Nemesio J.; Vázquez Grau, Gregorio (2014-04-01)
    Article
    Restricted access - publisher's policy
    Cyclostationary processes exhibit a form of frequency diversity. Based on that, we show that a digital waveform with symbol period T can be asymptotically represented as a rank-1 frequency-domain vector process which ...
  • Radio context awareness and applications 

    Reggiani, Luca; Fiorina, Jocelyn; Gezici, Sinan; Morosi, Simone; Nájar Martón, Montserrat (2013)
    Article
    Open Access
    The context refers to “any information that can be used to characterize the situation of an entity, where an entity can be a person, place, or physical object.” Radio context awareness is defined as the ability of detecting ...

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