Now showing items 1-12 of 12

    • Achievable DoF-delay trade-offs for the K-user MIMO interference channel with delayed CSIT 

      Torrellas, Marc; Agustín de Dios, Adrián; Vidal Manzano, José (2016-12-01)
      Article
      Open Access
      The degrees of freedom (DoFs) of the K-user multiple-input multiple-output (MIMO) interference channel are studied when perfect, but delayed channel state information is available at the transmitter side (delayed CSIT). ...
    • An alternative to IEEE 802.11ba: wake-up radio with legacy IEEE 802.11 transmitters 

      Cervià Caballé, Martí; Calveras Augé, Anna M.; López Aguilera, M. Elena; García Villegas, Eduard; Seyfettin Demirkol, Ilker; Paradells Aspas, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2019-04-09)
      Article
      Open Access
      Current standardization process for Wake-up Radio (WuR) within the IEEE 802.11 Working Group, known as the IEEE 802.11ba, has brought interest to the IEEE 802.11-related technologies for the implementation of WuR systems. ...
    • Closed form expressions for maximum delay and jitter in multibeam opportunistic beamforming 

      Zorba, Nizar; Pérez Neira, Ana Isabel (2007)
      Conference report
      Open Access
      Scheduling in a broadcast (BC) channel based on partial channel state information at the transmitter (CSIT) is carried out through a multibeam opportunistic beamforming technique. Within a more practical perspective, this ...
    • Constant-gain envelope tracking in a UHF outphasing transmitter based on continuousmode class-E GaN HEMT PAs 

      Ruiz Lavin, Maria de las Nieves; Benito, Adán L.; Pérez Cisneros, J. R.; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; García, J. A. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      A UHF outphasing transmitter, based on continuous-mode class-E power amplifiers (PAs) and implementing a constant-gain envelope tracking (ET) strategy, is presented in this paper. Drain terminating and biasing networks are ...
    • Dynamic bit allocation and differential quantization in feedback link for robust power allocation in multiuser opportunistic beamforming 

      Zorba, Nizar; Pascual Iserte, Antonio; Pérez Neira, Ana Isabel (2008)
      Conference report
      Open Access
      Multi-antenna systems provide advantages in terms of link quality and multiuser access capabilities, which can be achieved by using schemes as multibeam opportunistic beamforming. This scheme only requires partial channel ...
    • Limitaciones y alternativas de la recepción FM: diseño de receptores 

      Suárez Rilova, Adrián Roman (Universitat Politècnica de Catalunya, 2011-01)
      Master thesis (pre-Bologna period)
      Open Access
      Este proyecto consta de dos partes. En la primera se identifican diferentes factores de impacto de la radiodifusión (de tipo socio-económico y medioambiental). Se analiza el estado actual de la recepción en FM y ...
    • 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)
      Conference report
      Restricted access - publisher's policy
      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 ...
    • On the use of indoor radio environment maps for hetnets deployment 

      Umbert Juliana, Anna; Pérez Romero, Jordi; Casadevall Palacio, Fernando José; Kliks, Adrian; Kryszkiewicz, Pawel (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      This work analyses the feasibility of building an indoor Radio Environment Map (REM) for supporting the deployment of indoor small cells acting as secondary transmitters in the TVWS band. For that purpose, it proposes a ...
    • Phase only transmit beamforming for spectrum sharing microwave systems 

      Vázquez, Miguel Ángel; Blanco, Luis; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Open Access
      This paper deals with the problem of phase-only transmit beamforming in spectrum sharing microwave systems. In contrast to sub-6 GHz schemes, general microwave systems require a large number of antennas due to its huge ...
    • Prototipus de receptor superregeneratiu per a modulacions de fase 

      Casquero Rovira, Albert (Universitat Politècnica de Catalunya, 2008-07-30)
      Master thesis (pre-Bologna period)
      Open Access
    • Software radios: unifying the reconfiguration process over heterogeneous platforms 

      Revés Ballesté, Xavier; Gelonch Bosch, Antonio José; Majorevic, Vuk; Ferrús Ferré, Ramón Antonio (Hindawi Publishing Corporation, 2005)
      Article
      Open Access
      Future radio transceivers supporting the software radio concept will provide increased features for radio access networks. However, the reconfiguration of radio equipment requires the existence of architecture, a common ...
    • 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)
      Conference report
      Open Access
      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 ...