Ara es mostren els items 1-20 de 45

  • 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)
    Text en actes de congrés
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    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 ...
  • Adaptive bitrate and resource allocation for relay-assisted ARQ transmissions 

    Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga (2009)
    Text en actes de congrés
    Accés obert
    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 ...
  • 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)
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    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)
    Text en actes de congrés
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    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) ...
  • A stochastic approach for resource allocation with backhaul and energy harvesting constraints 

    Rubio López, Javier; Muñoz Medina, Olga; Pascual Iserte, Antonio (2016-07)
    Article
    Accés obert
    We propose a novel stochastic radio-resource-allocation strategy that achieves long-term fairness considering backhaul and air-interface capacity limitations. The base station (BS) is powered only with a finite battery ...
  • Beamforming and Multiuser Detection in CDMA Systems with External Interferences 

    Muñoz Medina, Olga; Fernández Rubio, Juan Antonio (ICASSP'99, 1999)
    Text en actes de congrés
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    Multiuser detection has been investigated to mitigate the near-far effect in CDMA systems. Antenna arrays have been shown to provide spatial diversity and cancel undesired signals. In this paper we consider the synergy of ...
  • Blind multiuser adaptive combining for asynchronous cdma systems 

    Muñoz Medina, Olga; Fernández Rubio, Juan Antonio (1996)
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    This paper presents a novel technique to globally estimate and track the direction of arrival (DOA) of different users in an asynchronous CDMA system. The estimates are obtained exploiting the temporal structure of CDMA ...
  • Blind multi-user combining at the base station for asynchronous CDMA systems 

    Muñoz Medina, Olga; Fernández Rubio, Juan Antonio (Institute of Electrical and Electronics Engineers (IEEE), 1996)
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    This paper studies the potential benefits of antenna arrays in cellular CDMA communications and proposes a powerful scheme to undertake the array processing at the base station in CDMA mobile systems. The proposed technique ...
  • Cancellation of external and multiple access interference in cdma systems using antenna arrays 

    Muñoz Medina, Olga; Fernández Rubio, Juan Antonio (D. DOCAMPO, A. R. FIGUEIRAS, F. PÉREZ, 1996)
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    This paper deals with the problem of multisensor-multiuser detection in CDMA systems in the presence of interferences external to the system. The paper presents a new method able to estimate the spatial signature of all ...
  • Cancellation of external and multiple access interference in cdma systems using antenna arrays 

    Muñoz Medina, Olga; Fernández Rubio, Juan Antonio (1997-09)
    Article
    Accés restringit per política de l'editorial
    This paper deals with the problem of multisensor-multiuser detection in CDMA systems in the presence of interferences external to the system. The paper presents a new method able to estimate the spatial signature of all ...
  • Closed-form capacity bounds for downlink and uplink decoupling 

    Aravanis, Alexios; Pascual Iserte, Antonio; Muñoz Medina, Olga (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Comunicació de congrés
    Accés obert
    Downlink (DL) and uplink (UL) decoupling (DUDe) is a new architectural paradigm where DL and UL are not constrained to be associated to the same base station (BS). Thus, a user having access to multiple BSs within a dense ...
  • 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
    Accés obert
  • 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)
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    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)
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  • Decentralized weighted sum rate maximization in MIMO-OFDMA femtocell networks 

    Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga; Rodríguez Fonollosa, Javier (2012)
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    We propose a decentralized strategy for downlink interference management in overlaid MIMO femtocell-macrocell deployments operating in the same band under OFDMA access. The resource allocation, consisting of MIMO precoders ...
  • Deliverable D21 (project TUCAN3G). Socio-economic scenarios, technical specifications and architecture for the proof of concept 

    García Rey, Ana; Prieto Egido, Ignacio; Sánchez, Ernesto; Muñoz Medina, Olga; Vidal Manzano, José; Agustín de Dios, Adrián; Pascual Iserte, Antonio; Simó Reigadas, Javier; Paco Fernández, Juan; Castillo Molina, Yury Yohana; Ramírez, Gustavo; Tupayachi Calderón, Omar (2013-05)
    Report de recerca
    Accés obert
    TUCAN3G aims to develop solutions to provide 3G services in isolated rural areas of developing countries. In order to do so, this document starts by analysing the reference scenarios where TUCAN3G solutions could be applied, ...
  • Downlink coordinated radio resource management in cellular networks with partial CSI 

    Calvo Page, Eduard; Muñoz Medina, Olga; Vidal Manzano, José; Agustín de Dios, Adrián (2012-03)
    Article
    Accés restringit per política de l'editorial
    We explore decentralized coordination of sectored cellular networks to adapt the usage of downlink resources to the instantaneous network conditions. The transmission frame consists of an orthogonal bandwidth usage ...
  • Downlink multi-cell radio resource management for coordinated base stations 

    Muñoz Medina, Olga; Calvo Page, Eduard; Vidal Manzano, José; Agustín de Dios, Adrián (2010)
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  • Efficient use of paired spectrum bands through TDD small cell deployments 

    Agustín de Dios, Adrián; Lagén Morancho, Sandra; Vidal Manzano, José; Muñoz Medina, Olga; Pascual Iserte, Antonio; Zhiheng, Guo; Ronghui, Wen (2017-09)
    Article
    Accés obert
    Traditionally, wireless cellular systems have been designed to operate in frequency division duplexing (FDD) paired bands that allocate the same amount of spectrum for both downlink (DL) and uplink (UL) communications. ...
  • Energy efficiency in latency-constrained application offloading from mobile clients to multiple virtual machines 

    Lagén Morancho, Sandra; Pascual Iserte, Antonio; Muñoz Medina, Olga; Vidal Manzano, José (2017-11-28)
    Article
    Accés obert
    This paper addresses the energy-latency trade-off in distributed application offloading, in which an energy-limited handset offloads totally or partially an application to one or several virtual machines (VMs) located in ...