Now showing items 1-12 of 12

  • A framework for joint design of pilot sequence and linear precoder 

    Pastore, Adriano; Joham, Michael; Rodríguez Fonollosa, Javier (2016-09-01)
    Article
    Open Access
    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 ...
  • 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) ...
  • A rate-splitting approach to fading multiple-access channels with imperfect channel-state information 

    Pastore, Adriano; Koch, Tobias; Rodríguez Fonollosa, Javier (2014)
    Conference report
    Restricted access - publisher's policy
    As shown by Medard, the capacity of fading channels with imperfect channel-state information (CSI) can be lowerbounded by assuming a Gaussian channel input and by treating the unknown portion of the channel multiplied ...
  • Balancing egoistic and altruistic transmit beamforming in femtocell networks 

    Husso, Mika; Dowhuszko, Alexis; Hamalainen, K.; Pastore, Adriano; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2011)
    Conference report
    Restricted access - publisher's policy
    In this paper, we study the balancing of egoistic (maximum-ratio, MR) and altruistic (zero-forcing, ZF) beamforming (BF) in femtocells through simulations. To investigate the achievable gains from operating between the ...
  • Communication rates for fading channels with imperfect channel-state information 

    Pastore, Adriano (Universitat Politècnica de Catalunya, 2014-07-26)
    Doctoral thesis
    Open Access
    The present thesis studies information rates for reliable transmission of information over fading channels in the realistic situation where the receiver has only imperfect channel-state knowledge. Of particular interest ...
  • Exploratory analysis of superposition coding and rate splitting for multibeam satellite systems 

    Caus, Marius; Pastore, Adriano; Navarro Rodero, Mònica; Ramirez, Tomás; Mosquera Nartallo, Carlos; Noels, Nele; Alagha, Nader; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    The adoption of aggressive frequency reuse schemes along with interference management techniques has become the leading paradigm in satellite communications to increase the spectral efficiency. In general terms, one cannot ...
  • FREEDOM D3.2 Interference Coordination Protocols in Femto-based Networks 

    Agustín de Dios, Adrián; Muñoz Medina, Olga; Vidal Manzano, José; Goldhammer, Mariana; Rodríguez Fonollosa, Javier; Pastore, Adriano; Sardellitti, Stefania; Pescosolido, Loreto; di Lorenzo, Paolo; Barbarossa, Sergio; Baiocchi, Andrea; de Marinis, Enrico; Imponente, Giovanni; Pucci, Fabrizio; Rosi, Guido (2011-11-28)
    External research report
    Open Access
    This document looks into coordinated radio resource allocation algorithms in deployments of huge number of femto-access points (FAP) by exploiting the message exchange at control-plane level through the wired ISP backhaul ...
  • Improved capacity lower bounds for fading channels with imperfect CSI using rate splitting 

    Pastore, Adriano; Koch, Tobias; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    As shown by Medard (“The effect upon channel capacity in wireless communications of perfect and imperfect knowledge of the channel,” IEEE Trans. Inform. Theory, May 2000), the capacity of fading channels with imperfect ...
  • Joint pilot and precoder design for optimal throughput 

    Pastore, Adriano; Joham, Michael; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2011)
    Conference report
    Restricted access - publisher's policy
    For single-user, multiple-input multiple-output (MIMO) channels with Rayleigh fading correlated at the transmitter side, and where the receiver only has partial channel knowledge in form of an MMSE channel estimate, we ...
  • On a mutual information and a capacity bound gap of pilot-aided MIMO channels 

    Pastore, Adriano; Joham, Michael; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2011)
    Conference report
    Restricted access - publisher's policy
    For single-user MIMO channels with partial re ceiver CSI, we study the difference between a lower bound and two alternative upper bounds of the mutual information achieved with Gaussian codebooks. These differences are ...
  • Optimal pilot design and power control in correlated MISO links 

    Pastore, Adriano; Rodríguez Fonollosa, Javier (2012)
    Conference report
    Restricted access - publisher's policy
    We study the maximization of an achievable ergodic rate expression of a multiple-input single-output (MISO) channel where both ends are cognizant of the same erroneous estimate of the current fading state, yet they have ...
  • Rate balancing in the vector BC with erroneous CSI at the receivers 

    Joham, Michael; Gründinger, Andreas; Pastore, Adriano; Rodríguez Fonollosa, Javier; Utschick, Wolfgang (2013)
    Conference report
    Restricted access - publisher's policy
    For the vector broadcast channel (BC), the case of erroneous channel state information (CSI) at the receiver is considered. Employing a well established lower bound for the mutual information with Gaussian signaling, a ...