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Ara es mostren els items 40-59 de 71

    • 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 ...

    • 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
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      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 ...

    • Network MIMO for downlink in-band relay transmissions with relaying phases of fixed duration 

      Agustín de Dios, Adrián; Vidal Manzano, José; Lagén Morancho, Sandra; Valera, Eduard (2011)
      Text en actes de congrés
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      A half-duplex 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. The duration of the relay-receive and the ...

    • 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)
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      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 ...

    • Network-MIMO for downlink in-band relay transmissions 

      Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2013-01-23)
      Article
      Accés restringit per política de l'editorial
      With the objective of improving the spectral efficiency and coverage homogeneity of wireless cellular systems in the downlink, we investigate how to take advantage of two promising transmission technologies envisioned in ...

    • On the degrees of freedom of the K-user MISO interference channel with imperfect delayed CSIT 

      Torrellas Socastro, Marc; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
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      This work investigates the degrees of freedom (DoF) of the K-user multiple-input single-output (MISO) interference channel (IC) with imperfect delayed channel state information at the transmitters (dCSIT). For this setting, ...

    • On the superiority of improper Gaussian signaling in wireless interference MIMO scenarios 

      Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José (2016-08)
      Article
      Accés obert
      Recent results have elucidated the benefits of using improper Gaussian signaling (IGS) as compared to conventional proper Gaussian signaling (PGS) in terms of achievable rate for interference-limited conditions. This paper ...

    • Optimizing access demand for mMTC traffic using neural networks 

      Llobet Turró, Martí; Cabrera-Bean, Margarita; Vidal Manzano, José; Agustín de Dios, Adrián (Institute of Electrical and Electronics Engineers (IEEE), 2023-12)
      Article
      Accés obert
      Machine-type communications show unique spatial and temporal correlation properties that often lead to bursty access demand profiles. With the expected large-scale deployment of the Internet of Things (IoT), next-generation ...

    • Performance analysis of feedback-free collision resolution NDMA protocol 

      Lagén Morancho, Sandra; Agustín de Dios, Adrián; Vidal Manzano, José; García Mateos, Jorge (2018-12-01)
      Article
      Accés obert
      To support communications of a large number of deployed devices while guaranteeing limited signaling load, low energy consumption, and high reliability, future cellular systems require efficient random access protocols. ...

    • Performance analysis of inter-cell interference coordination in small-cell networks with long feedback delays 

      Torrellas Socastro, Marc; Agustín de Dios, Adrián; Vidal Manzano, José (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Current state-of-the-art approaches are evaluated for the downlink (DL) of an LTE-based wireless network when multiple Small-Cells (SC) eNBs coexist in the same area. With the aim of increasing data-rate performance of ...

    • 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 ...

    • 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
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      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 ...

    • Receive antenna selection and hybrid precoding for receive spatial modulation in massive 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
      Recently, a receive spatial modulation (RSM) for massive multiple-input-multiple-output operating in millimeter wave (mmWave) was introduced with the purpose of simplifying user terminal circuit by employing only one ...

    • Receive spatial modulation for massive MIMO systems 

      Raafat Hosny Mohamed Fahm, Ahmed; Agustín de Dios, Adrián; Vidal Manzano, José (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Text en actes de congrés
      Accés obert
      In this paper, we consider the downlink of a massive multiple-input-multiple-output (MIMO) single user transmission system operating in the millimeter wave outdoor narrowband channel environment. We propose a novel receive ...