Enviaments recents

  • Sparse multiple relay selection for network beamforming with individual power constraints using semidefinite relaxation 

    Blanco, Luis; Nájar Martón, Montserrat (2016-02)
    Article
    Accés obert
    This paper deals with the multiple relay selection problem in two-hop wireless cooperative networks with individual power constraints at the relays. In particular, it addresses the problem of selecting the best subset of ...
  • Achievable DoF-delay trade-offs for the K-user MIMO interference channel with delayed CSIT 

    Torrellas, Marc; Agustín de Dios, Adrián; Vidal Manzano, José (2016-12-01)
    Article
    Accés obert
    The degrees of freedom (DoFs) of the K-user multiple-input multiple-output (MIMO) interference channel are studied when perfect, but delayed channel state information is available at the transmitter side (delayed CSIT). ...
  • Joint optimization of power and data transfer in multiuser MIMO systems 

    Rubio López, Javier; Pascual Iserte, Antonio; Palomar, Daniel P.; Goldsmith, Andrea (2017-01-01)
    Article
    Accés obert
    We present an approach to solve the nonconvex optimization problem that arises when designing the transmit covariance matrices in multiuser multiple-input multiple-output (MIMO) broadcast networks implementing simultaneous ...
  • A framework for joint design of pilot sequence and linear precoder 

    Pastore, Adriano; Joham, Michael; Rodríguez Fonollosa, Javier (2016-09-01)
    Article
    Accés obert
    Most performance measures of pilot-assisted multiple-input multiple-output systems are functions of the linear precoder and the pilot sequence. A framework for the optimization of these two parameters is proposed, based ...
  • On the superiority of improper Gaussian signaling in wireless interference MIMO scenarios 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2016-08)
    Article
    Accés obert
    Recent results have elucidated the benefits of using improper Gaussian signaling (IGS) as compared to conventional proper Gaussian signaling (PGS) in terms of achievable rate for interference-limited conditions. This paper ...
  • A polynomial rooting approach for synchronization in multipath channels using antenna arrays 

    Seco Granados, Gonzalo; Swindlehurst, A K; Fernández Rubio, Juan Antonio (2000-08)
    Article
    Accés obert
    The estimation of the delay of a known training signal received by an antenna array in a multipath channel is addressed. The effect of the co-channel interference is taken into account by including a term with unknown ...
  • Guest editorial: adaptive antennas in wireless communications 

    Rodríguez Fonollosa, Javier (1999-06)
    Article
    Accés restringit per política de l'editorial
  • Numerical simulation of long path spherical wave propagation in three-dimensional random media 

    Fernández Rubio, Juan Antonio; Belmonte Molina, Aniceto; Comerón Tejero, Adolfo (1999-09)
    Article
    Accés restringit per política de l'editorial
    A new method to overcome some limitations in the simulation of the propagation of waves originating from a point source through a very long path in a turbulent medium is presented. Existing propagation simulation algorithms ...
  • Blind multiuser detection with array observations 

    Rodríguez Fonollosa, Javier; Zvonar, Z; Rodríguez Fonollosa, José Adrián; Catala, J (1998-01)
    Article
    Accés obert
    Cochannel interference is usually a major limitation to the performance of mobile wireless systems. Examples of different forms of cochannel interference include multi-access interference in CDMA systems and cochannel ...
  • Fourier models for non linear signal processing 

    Pagès Zamora, Alba Maria; Lagunas Hernandez, Miguel A. (1999-12)
    Article
    Accés restringit per política de l'editorial
    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 ...

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