Ara es mostren els items 46-65 de 79

    • Linear transceiver design in nonregenerative relays with channel state information 

      Muñoz Medina, Olga; Vidal Manzano, José; Agustín de Dios, Adrián (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-06)
      Article
      Accés obert
      This paper deals with the design of nonregenerative relaying transceivers in cooperative systems where channel state information (CSI) is available at the relay station. The conventional nonregenerative approach is the ...
    • Long-term provisioning of radio resources based on their utilization in dense OFDMA networks 

      Lagén Morancho, Sandra; Muñoz Medina, Olga; Pascual Iserte, Antonio; Vidal Manzano, José; Agustín de Dios, Adrián (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents long-term resource provisioning schemes for dense multi-cell OFDMA-based networks, where multiple cells with possibly overlapping coverage areas compete for the same set of resources. The optimization ...
    • LOS/NLOS estimators for mmWave cellular systems with blockages 

      Ortega Sánchez-Colomer, Tomás; Pascual Iserte, Antonio; Muñoz Medina, Olga (2022-01)
      Article
      Accés obert
      Designers of millimeter wave (mmWave) cellular systems need to evaluate line-of-sight (LOS) maps to provide good service to users in urban scenarios. In this letter, we derive estimators to obtain LOS maps in scenarios ...
    • MCS and sub-band selection for downlink interference coordination in LTE-A Femtocells 

      Muñoz Medina, Olga; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper proposes a decentralized algorithm for interference coordination in LTE-A networks, based on the exchange of information (pricing) at control plane level. In our approach, every user equipment (UE) report the ...
    • Multi-user precoder designs for RGB visible light communication systems 

      Viñals Terrés, Roser; Muñoz Medina, Olga; Agustín de Dios, Adrián; Vidal Manzano, José (2020-11-29)
      Article
      Accés obert
      In this paper, we design linear precoders for the downlink of a visible light communication (VLC) system that simultaneously serves multiple users. Instead of using phosphor-coated white light-emitting diodes (PWLEDs), we ...
    • Network dimensioning and base station on/off switching strategies for sustainable deployments in remote areas 

      Rubio López, Javier; Olmo Alòs, Jaume del; Pascual Iserte, Antonio; Vidal Manzano, José; Muñoz Medina, Olga; Agustín de Dios, Adrián (2017-12)
      Article
      Accés obert
      This paper provides a methodology for the dimensioning of the access network in remote rural areas, considering the progressive introduction of cellular services in these regions. A 3G small cell (SC) network with one or ...
    • Network-MIMO backhauling for QOS-constrained relay transmission 

      Vidal Manzano, José; Agustín de Dios, Adrián; Lagén Morancho, Sandra; Valera, Eduard; Muñoz Medina, Olga; García Armada, Ana; Sánchez Fernández, Matilde (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A relay station (RS)-based cellular system deployment is considered, where multiple base stations (BS) cooperate in the BS-RS in-band transmission for the downlink. With the joint optimization of the resources allocated ...
    • On the coordination of base stations in ultra dense cellular networks 

      Aravanis, Alexios; Muñoz Medina, Olga; Pascual Iserte, Antonio; di Renzo, Marco (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
      Accés obert
      Ultra dense networks (UDNs) allow for efficient spatial reuse of the spectrum, giving rise to substantial capacity and power gains. However, recent findings have demonstrated that the reduction of inter-site distances after ...
    • Optimization of radio and computational resources for energy efficiency in latency-constrained application offloading 

      Muñoz Medina, Olga; Pascual Iserte, Antonio; Vidal Manzano, José (2015-10)
      Article
      Accés obert
      Providing femto access points (FAPs) with computational capabilities will allow (either total or partial) offloading of highly demanding applications from smartphones to the so-called femto-cloud. Such offloading promises ...
    • Performance of downlink schedulers with superposed or orthogonal transmissions 

      Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga (2010)
      Text en actes de congrés
      Accés obert
      This work looks into the extension of the proportional fair (PF) scheduler to the multi-user case, where the source is transmitting several messages under the superposition coding (SC) strategy in a Gaussian Broadcast ...
    • Preemption and QoS management algorithms for coordinated and uncoordinated base stations 

      Muñoz Medina, Olga; Pascual Iserte, Antonio; Baquero, Pau; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2011)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper addresses the problem of resource allocation and quality of service (QoS) management in a downlink communication system where the users are allowed to be attached to and receive data from one or several ...
    • Project Final Report – FREEDOM ICT-248891 

      Muñoz Medina, Olga; Vidal Manzano, José; Agustín de Dios, Adrián; de Marinis, Enrico; Janneteau, Christophe; Barbarossa, Sergio; Becvar, Zdenek; Vivier, Guillaume; Lostanlen, Yves; Sundara, Rahadian K.; Hariyanto, Hadi (2012-03-13)
      Report de recerca
      Accés obert
      This document is the final publishable summary report of the objective and work carried out within the European Project FREEDOM, ICT-248891.
    • Protocols and resource allocation for the two-way relay channel with half-duplex terminals 

      Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga (2009)
      Text en actes de congrés
      Accés obert
      The two-way relay channel (TWRC) describes the communication between two terminals sharing a common relay. In this work we compare different protocols for the TWRC with a half-duplex relay (forwarding and protocol I) and ...
    • Rate optimization for RIS-aided mMTC networks in the finite blocklength regime 

      Liesegang Maria, Sergi; Zappone, Alessio; Muñoz Medina, Olga; Pascual Iserte, Antonio (2023-03)
      Article
      Accés obert
      Reconfigurable intelligent surfaces (RISs) have become a promising candidate for the development of future mobile systems. In the context of massive machine-type communications (mMTC), a RIS can be used to support the ...
    • Robust precoding for multi-user visible light communications with quantized channel information 

      Muñoz Medina, Olga; Pascual Iserte, Antonio; San Arranz, Guillermo (Multidisciplinary Digital Publishing Institute (MDPI), 2022-11-28)
      Article
      Accés obert
      In this paper, we address the design of multi-user multiple-input single-output (MU-MISO) precoders for indoor visible light communication (VLC) systems. The goal is to minimize the transmitted optical power per light ...
    • Sensor selection and distributed quantization for energy efficiency in massive MTC 

      Liesegang Maria, Sergi; Muñoz Medina, Olga; Pascual Iserte, Antonio (2021-12)
      Article
      Accés obert
      This paper presents an estimation approach within the framework of uplink massive machine-type-communications (mMTC) that considers the energy limitations of the devices. We focus on a scenario where a group of sensors ...
    • Small rural operators techno-economic analysis to bring mobile services to isolated communities: The case of Peru Amazon rainforest 

      Prieto Egido, Ignacio; Aragon Valladares, Joel; Muñoz Medina, Olga; Córdoba Bernuy, César; Simó Reigadas, Javier; Auccapuri Quispetupa, Darwin; Bravo Fernández, Alenjandro; Martínez Fernández, Andrés (2020-11)
      Article
      Accés obert
      A large number of rural communities in developing countries do not have access to communications services, unlike urban areas where these services have rapidly grown. This connectivity gap is mainly caused by the urban-oriented ...
    • Spatial-temporal processing with restriction of degrees of freedom for CDMA-multiuser detection 

      Muñoz Medina, Olga; Fernández Rubio, Juan Antonio (1998)
      Text en actes de congrés
      Accés obert
      Multipath distortion and multiple access interference are major limitations for the performance of wireless CDMA systems. In order to overcome both problems, a base-station antenna array RAKE receiver is proposed in this ...
    • Stochastic geometry analysis and design of wireless powered MTC networks 

      Liesegang Maria, Sergi; Muñoz Medina, Olga; Pascual Iserte, Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Text en actes de congrés
      Accés obert
      Machine-type-communications (MTC) are being crucial in the development of next generation mobile networks. Given that MTC devices are usually battery constrained, wireless power transfer (WPT) and energy harvesting (EH) ...
    • Stochastic resource allocation with a backhaul constraint for the uplink 

      Rubio López, Javier; Muñoz Medina, Olga; Pascual Iserte, Antonio; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés obert
      We propose a novel stochastic radio resource alloca- tion strategy for the uplink that achieves long-term fairness in terms of similar bitrates considering backhaul and air-interface capacity limitations. We focus on a ...