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Ara es mostren els items 27-46 de 71

    • 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
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      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
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      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 ...

    • FREEDOM D3.3 - Cooperative schemes in the femto-based networks 

      Agustín de Dios, Adrián; Vidal Manzano, José; Pescosolido, L.; Barbarossa, S.; Kammoun, M.; Sarkiss, M. (2012-01)
      Report de recerca
      Accés obert
      We investigate cooperative transmission schemes that can be applied to joint deployments of femto-access points (FAPs) and macro base stations (MBS) by exploiting backhaul communication links between nodes at the data-plane ...

    • FREEDOM D4.2 Design and evaluation of effective procedures for MAC layer 

      Mach, Pavel; Becvar, Zdenek; Bestak, Robert; Neruda, M.; Roux, Pierre; Hariyanto, Hari; Ari Wibowo, Franciscus X.; Agustín de Dios, Adrián; Muñoz Medina, Olga; Vidal Manzano, José; Carfagna, Alessandro (2012-01-16)
      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 Project. Interference coordination protocols in femto-based networks 

      Rosi, Guido; Pucci, Fabrizio; Imponente, Giovanni; de Marinis, Enrico; Baiocchi, Andrea; Barbarossa, Sergio; di Lorenzo, Paolo; Agustín de Dios, Adrián; Muñoz Medina, Olga; Vidal Manzano, José; Goldhamer, M.; Rodríguez Fonollosa, Javier; Pastore, A.; Sardellitti, Stefania; Pescosolido, Loreto (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 ...

    • FREEDOM Project. Scenario, requirements and first business model analysis 

      Imponente, Giovanni; Vivier, G.; Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga; Barbarossa, Sergio; Pescosolido, Loreto; Omilipo, M; de Marinis, Enrico; Simamora, L; Widiawan, A.K.; Hariyanto, H; Corre, Y; Mach, P; Becvar, Z; Kamoun, M; Roux, P; Lopatka, M (2010-06-20)
      Report de recerca
      Accés obert
      This deliverable is the first of FREEDOM project. It provides an outlook of the scenarios and assumptions widely shared in the wireless community when addressing femtocell deployment. It starts by providing scenarios as ...

    • Hierarchical beamforming in random access channels 

      Agustín de Dios, Adrián; Cabrera-Bean, Margarita; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Comunicació de congrés
      Accés obert
      Managing a massive number of terminals in a contention-based multiple access is challenging due to its intrinsic limited efficiency. For example, in the random access channel considered in LTE-A and 5G NR, Base Station ...

    • 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 ...

    • Improper Gaussian signaling for the Z-interference channel 

      Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The optimal transmission scheme for a multiple-input multiple-output point-to-point channel (MIMO-P2P) is dependent on the type of received interference, which can be either proper or improper. We will show that the presence ...

    • Improved interference alignment precoding for the MIMO X channel 

      Agustín de Dios, Adrián; Vidal Manzano, José (2011)
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      Accés restringit per política de l'editorial
      We derive a linear transmit precoding scheme based on interference alignment at the transmitters and zero-forcing at the receivers, for the MIMO X channel based on the Generalized Singular Value Decomposition (GSVD) that ...

    • Innovative mmWave transmissions schemes channel models and antennas 

      Agustín de Dios, Adrián; Vidal Manzano, José; Pascual Iserte, Antonio; Raafat Hosny Mohamed Fahm, Ahmed; Aslam, Zahid; Corre, Yoann; Basavarajappa, Vedaprabhu; Bedia, Beatriz; Tan, Yi; Wang, Cheng-Xiang (2017-10-12)
      Report de recerca
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      The next generation (5G) of wireless communication will improve upon existing mobile communication standards significantly while taking into account the increasing amount of stress on the limited amount of available ...

    • Joint user scheduling and transmit direction selection in 5G TDD dense small cell networks 

      Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper proposes a joint user scheduling and transmit direction selection procedure for dynamic TDD in 5G dense small cell networks, where the transmit direction (i.e. downlink (DL) or uplink (UL)) selected per small ...

    • Joint user scheduling, precoder design, and transmit direction selection in MIMO TDD small cell networks 

      Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2017-04-01)
      Article
      Accés obert
      New short-length single-direction frame structures are proposed for 5G time division duplex (TDD) systems, where the transmit direction [i.e., either downlink (DL) or uplink (UL)] can be independently chosen at each cell ...

    • 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 obert
      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 ...

    • 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 ...

    • MMSE precoding for receive spatial modulation in large MIMO systems 

      Raafat Hosny Mohamed Fahm, Ahmed; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Comunicació de congrés
      Accés obert
      Receive spatial modulation (RSM) schemes enable simple and energy efficient multiple-input-multiple-output (MIMO) transceivers and yet attain high spectral efficiency, which renders them promising schemes for millimeter ...

    • 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 ...

    • Net DoF analysis for the K-user MISO IC with outdated and imperfect channel feedback 

      Torrellas Socastro, Marc; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The net degrees of freedom (DoF ) describe the efficiency of a protocol in terms of network throughput at high signal-to-noise ratio (SNR). As the conventional DoF, it captures how the achievable user data rate grows as ...

    • 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 ...