Ara es mostren els items 1-20 de 40

  • 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)
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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 ...
  • 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 ...
  • Adaptive bitrate and resource allocation for relay-assisted ARQ transmissions 

    Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga (2009)
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    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)
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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) ...
  • Beamforming and Multiuser Detection in CDMA Systems with External Interferences 

    Muñoz Medina, Olga; Fernández Rubio, Juan Antonio (ICASSP'99, 1999)
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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 ...
  • 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 ...
  • 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 ...
  • Compress-and-forward cooperative MIMO relaying with full channel state information 

    Simoens, Sebastien; Muñoz Medina, Olga; Vidal Manzano, José; Coso, Aitor del (2010-02)
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    Accés obert
  • 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
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    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-latency trade-off for multiuser wireless computation offloading 

    Muñoz Medina, Olga; Pascual Iserte, Antonio; Vidal Manzano, José; Molina Pena, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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    This paper addresses the trade-off between latency and energy consumption in wireless application offloading in a multiuser set-up. The advantages of carrying out offloading versus executing an application locally at the ...
  • Estudio comparativo de las matrices de correlación clásica y cíclica en arrays de banda estrecha 

    Cerquides Bueno, José Ramón; Muñoz Medina, Olga; Fernández Rubio, Juan Antonio (1993)
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    The aim of this communication is to study the differences and similarities between the classic and cyclic correlation matrices of the data snapshots sensed by an array. We will focus our study in the comparison of ...
  • FREEDOM - D42 Design and evaluation of effective procedures for MAC layer 

    Mach, P.; Becvar, Z.; Bestak, R.; Neruda, M.; Roux, P.; Hariyanto, H.; Ari Wibowo, F.X.; Agustín de Dios, Adrián; Muñoz Medina, Olga; Vidal Manzano, José; Carfagna, A. (2012-01)
    Report de recerca
    Accés obert
    The implementation of femtocells introduces many technical challenges that must be solved in order to fully exploit their potentials. This deliverable primarily focuses on control procedures for radio resource management ...
  • 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)
    Report de recerca
    Accés obert
    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 ...