• Exploiting the cylic prefix for beamforming in OFDM receivers 

    Pérez Neira, Ana Isabel; Bartolomé Calvo, Diego (2002)
    Texto en actas de congreso
    Acceso abierto
    ­Blind and semiblind antenna array algorithms are proposed for Orthogonal Frequency Division Multiplexing (OFDM) systems in the time domain. A blind technique is proposed for the maximization of the temporal Signal to Noise ...
  • Fairness Analysis of Wireless Beamforming Schedulers 

    Bartolomé Calvo, Diego (Universitat Politècnica de Catalunya, 2005-01-12)
    Tesis
    Acceso abierto
    Aquesta tesi es dedica a l'anàlisi de la justícia a la capa física en entorns de comunicacions amb múltiples antenes i diversos usuaris, cosa que implica un nou punt de vista sobre problemas tradicionals. Malgrat això, el ...
  • Multiuser spatial scheduling algorithms for wireless systems 

    Pérez Neira, Ana Isabel; Bartolomé Calvo, Diego; Pascual, T. (2003)
    Texto en actas de congreso
    Acceso abierto
    Optimizing a communication of a Q-antenna Access Point (AP) with K single antenna terminals is not straightforward. Since a global optimization might not be solvable in real time, the AP has several alternatives involving ...
  • Practical bit loading schemes for multi-antenna multi-user wireless OFDM systems 

    Bartolomé Calvo, Diego; Pérez Neira, Ana Isabel (2004)
    Texto en actas de congreso
    Acceso abierto
    This paper deals with practical multi-antenna multiuser OFDM systems. With the additional degrees of freedom of multiple antennas and multiple subcarriers, the performance might be enhanced, but the scheduling complexity ...
  • Pre-and post FFT SIMO array techniques in H2 environments 

    Pérez Neira, Ana Isabel; Bartolomé Calvo, Diego (2002)
    Texto en actas de congreso
    Acceso abierto
    The performance of very high data rate Wireless Local Area Networks (WLANs) is degraded by several problems such as long delay spread in outdoor environments or interference that may arise both from other WLANs or from ...
  • Real-time scheduling for wireless multiuser MISO systems under different fairness criteria 

    Bartolomé Calvo, Diego; Palomar, Daniel P.; Pérez Neira, Ana Isabel (2003)
    Texto en actas de congreso
    Acceso abierto
    This paper deals with the spatio-temporal scheduling of a set of users for downlink transmission in a cell where the base station is provided with multiple antennas. Two main issues are addressed: how the users are ...
  • Single input multiple output techniques for Hiperlan/ 2 

    Pérez Neira, Ana Isabel; Bartolomé Calvo, Diego; Mestre Pons, Francesc X. (2001)
    Texto en actas de congreso
    Acceso abierto
    In this paper, the use of adaptive antennas for Orthogonal Frequency Division Multiplexing (OFDM) is studied. More in concrete the paper is devoted to possible standard-jiendly techniques for Hiperlan/2 (HL/2). First, the ...
  • Spatial scheduling in multiusersWireless systems: from power allocation to admission control 

    Bartolomé Calvo, Diego; Pérez Neira, Ana Isabel (2006-08)
    Artículo
    Acceso abierto
    Given a zero forcing transmit beamforming, we focus on how the multi-antenna access point distributes the scarce resource (power) among the single-antenna terminals. Since there is a clear trade-off between the satisfaction ...