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Ara es mostren els items 42-61 de 79

    • Hybrid turbo FEC/ARQ systems and distributed space-time coding for cooperative transmission 

      Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga (2005-08-24)
      Article
      Accés obert
      Cooperative transmission can be seen as a "virtual" MIMO system, where the multiple transmit antennas are in fact implemented distributed by the antennas both at the source and the relay terminal. Depending on the system ...

    • Interference statistics approximations for data rate analysis in uplink massive MTC 

      Liesegang Maria, Sergi; Muñoz Medina, Olga; Pascual Iserte, Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      Machine-type-communications have attracted a lot of interest in the past years. They rely on interactions between devices with no human supervision. This will help to the advent of a plethora of applications such as the ...

    • Joint allocation of radio and computational resources in wireless application offloading 

      Muñoz Medina, Olga; Pascual Iserte, Antonio; Vidal Manzano, José (European Commission. EU Publications, 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Providing femto-access points (FAPs) with computational capabilities will allow (either totally or partially) offloading of highly demanding applications from smart-phones to the so called femto-cloud. Such offloading ...

    • Joint scheduling of communication and computation resources in multiuser wireless application offloading 

      Molina Pena, Marc; Muñoz Medina, Olga; Pascual Iserte, Antonio; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés obert
      We consider a system where multiple users are connected to a small cell base station enhanced with computational capabilities. Instead of doing the computation locally at the handset, the users offload the computation ...

    • 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 ...