Now showing items 1-20 of 114

  • 3G access network dimensioning in isolated rural areas based on femtocells 

    Olmo Alòs, Jaume del; Pascual Iserte, Antonio; Vidal Manzano, José; Muñoz Medina, Olga; Agustín de Dios, Adrián (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference report
    Restricted access - publisher's policy
    Based on the definition of the access network architecture and the forecast of voice and data traffic evolution, this paper derives engineering rules for radio network dimensioning of 3G femtocell-based access networks in ...
  • 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
    Open Access
    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). ...
  • Adaptive bitrate and resource allocation for relay-assisted ARQ transmissions 

    Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga (2009)
    Conference report
    Open Access
    Automatic repeat request (ARQ) protocols deal with the situations where the selected data rate is not supported by the current channel realization. The inappropriate selection is motivated by the limited channel state ...
  • Adaptive blind equalization using weighted cumulant slices 

    Vidal Manzano, José; Rodríguez Fonollosa, José Adrián (Institute of Electrical and Electronics Engineers (IEEE), 1994)
    Conference report
    Open Access
    Many linear methods have been proposed in the literature to blindly estimate the ARMA parameters of a time series using HOS. Nevertheless, they are mainly off-line and not much has been done in the adaptive case. The method ...
  • Adaptive blind system identification using weighted cumulant slices 

    Vidal Manzano, José; Rodríguez Fonollosa, José Adrián (1996-03)
    Article
    Restricted access - publisher's policy
    Many linear methods have been proposed in the literature to blindly estimate the ARMA parameters of a time series using HOS. Nevertheless, they are mainly off-line and not much has been done in the adaptive case. The method ...
  • Analysis of downlink and uplink decoupling in dense cellular networks 

    Aravanis, Alexios; Muñoz Medina, Olga; Pascual Iserte, Antonio; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Restricted access - publisher's policy
    Decoupling uplink (UL) and downlink (DL) is a new architectural paradigm where DL and UL are not constrained to be associated to the same base station (BS). Building upon this paradigm, the goal of the present paper is to ...
  • Analytical resource optimization for DF relay-assisted transmission under HARQ 

    Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga (IEEE Press. Institute of Electrical and Electronics Engineers, 2009)
    Conference report
    Open Access
    Under limited channel state information at the transmitter the communication suffers from the outage events produced by a data rate selection not supported by the current channel realization. Automatic repeat request (ARQ) ...
  • Analytic performance evaluation of cumulant-based arma system identification methods 

    Rodríguez Fonollosa, José Adrián; Vidal Manzano, José (IEEE IEEE PRESS, 1993)
    Conference report
    Open Access
    The authors perform an analytic study of some cumulant-based methods for estimating the AR parameters of ARMA processes. The analysis includes new AR identifiability results for pure AR process and the analytic performance ...
  • An architecture for mobile computation offloading on cloud-enabled LTE small cells 

    Lobillo Vilela, Felicia; Becvar, Zdenek; Puente, Miguel Angel; Mach, Pavel; Lo Presti, Francesco; Gambetti, Fabrizio; Goldhamer, Mariana; Vidal Manzano, José; Widiawan, Anggoro K.; Calvanesse, Emilio (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Conference lecture
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    Small cell networks are currently seen as a new way to satisfy the increasing wireless traffic demand. The proximity of base stations to subscribers brings many possibilities for the development of new applications, including ...
  • An improved interference alignment scheme for frequency selective channels 

    Shen, Minqi; Host-Madsen, Anders; Vidal Manzano, José (2008)
    Conference report
    Open Access
    In this paper, the achievable rate of a K-user interference channel with single antenna at individual node is studied. Interference alignment and zero forcing are applied at the transmitter and receiver, respectively. ...
  • A practical approach for NLOS mitigation in location-aware networks 

    René, Játiva A.; Valdiviezo, Santiago; Espinosa, Andy; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    This paper introduces a practical two-stage approach to achieve the mitigation of the Non Line Of Sight condition by using space-time diversity in timing-based mobile subscribers positioning systems. The first stage performs ...
  • A service-constrained positioning strategy for an autonomous fleet of airborne base stations 

    José Torra, Ferran; Pascual Iserte, Antonio; Vidal Manzano, José (Multidisciplinary Digital Publishing Institute (MDPI), 2018-10)
    Article
    Open Access
    This paper proposes a positioning strategy for a fleet of unmanned aerial vehicles (UAVs) airlifting wireless base stations driven by communication constraints. First, two schedulers that model the distribution of resources ...
  • Blind multiuser deconvolution in fading and dispersive channels 

    Rodríguez Fonollosa, Javier; Rodríguez Fonollosa, José Adrián; Zvonar, Z; Vidal Manzano, José (. S.N., 1995)
    Conference report
    Open Access
    An adaptive near-far resistant technique for the blind joint multiuser identification and detection in asynchronous CDMA systems is analyzed in fading and dispersive GSM channels.
  • Blind multiuser identification and detection in cdma systems 

    Rodríguez Fonollosa, Javier; Rodríguez Fonollosa, José Adrián; Zvonar, Z; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 1995)
    Conference report
    Open Access
    Multiuser detection in code division multiple access systems usually requires either knowledge of the transmitted signature sequences and channel state information or use of a known training sequence for adaptation. We ...
  • Channel training procedures for MIMO interfering point-to-multipoint channel 

    Agustín de Dios, Adrián; Lagén Morancho, Sandra; Vidal Manzano, José (2014)
    Conference report
    Restricted access - publisher's policy
    A precise knowledge of the MIMO channel between the serving node and the user equipment (UE) is important for attaining good data rates in downlink transmissions (DL) in cellular systems. The interfering point-tomulti ...
  • Coexisting linear and widely linear transceivers in the MIMO interference 

    Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2016-01)
    Article
    Open Access
    Recent results have shown the benefits of widely linear precoding (WLP) in the MIMO interference channel (MIMO IC) assuming that all transmitters can follow the same strategy. Motivated by a transitional scenario where ...
  • Compress-and-forward cooperative MIMO relaying with full channel state information 

    Simoens, Sebastien; Muñoz Medina, Olga; Vidal Manzano, José; Coso, Aitor del (2010-02)
    Article
    Open Access
  • Cooperative linear precoding for multi-user MISO visible light communications 

    Viñals Terrés, Roser; Muñoz Medina, Olga; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Open Access
    This paper develops and evaluates precoding techniques for coordinated joint transmission in visible light communications (VLC). A multi-user multiple-input single-output (MISO) setup is adopted. Transmitters are equipped ...
  • Coordinated MIMO precoding for power minimization in femtocell systems 

    Muñoz Medina, Olga; Vidal Manzano, José; Agustín de Dios, Adrián; Pascual Iserte, Antonio; Barbarossa, Sergio (IEEE, 2011)
    Conference report
    Restricted access - publisher's policy
  • Cramer-Rao bounds in the estimation of time of arrival in fading channels 

    René Jativa, E.; Vidal Manzano, José (2018-03-16)
    Article
    Open Access
    This paper computes the Cramer-Rao bounds for the time of arrival estimation in a multipath Rice and Rayleigh fading scenario, conditioned to the previous estimation of a set of propagation channels, since these channel ...