Enviaments recents

  • Rate splitting for MIMO multibeam satellite systems 

    Vázquez Oliver, Miguel Ángel; Caus, Marius; Pérez Neira, Ana Isabel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Text en actes de congrés
    Accés obert
    This paper deals with the problem of precoding in multibeam satellite system with rate splitting (RS). In contrast to the single-stream (SS) case where a unique private frame is transmitted towards each beam, in RS we ...
  • 1.25–2.5 Gb/s simple nyquist transmitters for coherent UDWDM-PON with enhanced spectral efficiency 

    Velásquez Micolta, Juan Camilo; Tabares Giraldo, Jeison; Cano Valadez, Iván Nicolás; Prat Gomà, Josep Joan (2018-04-19)
    Article
    Accés obert
    We present a coherent ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON) with enhanced spectral efficiency. The benefit of using Gaussian or Nyquist pulse-shaping filters at the transmitter ...
  • Oriented trajectories as a method for audience measurement 

    López Palma, Manuel; Morros Rubió, Josep Ramon; Gago Barrio, Javier; Corbalán Fuertes, Montserrat (2018)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The quantification of the attention received by advertisements is of paramount importance to determine its effectiveness. In this work, a simple and effective objective method for the assessment of the attention given to ...
  • Performance study of uplink and downlink splitting in ultradense highly loaded networks 

    Wang, Hui; García Lozano, Mario; Mutafungwa, Edward; Yin, Xuefeng; Ruiz Boqué, Sílvia (2018-07-15)
    Article
    Accés obert
    This paper provides new insights into the performance of Uplink and Downlink Splitting (UDS) in highly loaded wireless communication systems, in terms of both serving nodes and the number of users with high traffic activity. ...
  • Intensity-based adaptive optics with sequential optimization for laser communications 

    Carrizo, Carlos E.; Mata Calvo, Ramón; Belmonte Molina, Aniceto (2018-06-25)
    Article
    Accés obert
    Wavefront distortions of optical waves propagating through the turbulent atmosphere are responsible for phase and amplitude fluctuations, causing random fading in the signal coupled into single-mode optical fibers. Wavefront ...
  • Passive optical networks: introduction 

    Altabas, Jose Antonio; Sarmiento Hernández, Samael; Lázaro Villa, José Antonio (John Wiley & sons, 2018-08-15)
    Capítol de llibre
    Accés restringit per política de l'editorial
    Passive optical networks (PONs) are telecommunication networks that provide services to users by no active elements. Only passive elements are used in the network to transmit the information and signals between users as ...
  • Assessment of 3-D printing technologies for millimeter-wave reflectors 

    Romeu Robert, Jordi; Blanch Boris, Sebastián; Vidal, Neus; Lopez-Villegas, Jose Maria; Aguasca Solé, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 2018-07-20)
    Article
    Accés obert
    Three different 3D printing technologies: Stereolithography (SLA), Fused Deposition Modeling (FDM) and HP Multi Jet Fusion Technology (MJF) are compared to build a parabolic reflector operating at 100 GHz. Fabrication ...
  • Economic uncertainty: a geometric indicator of discrepancy among experts’ expectations 

    Claveria González, Oscar; Monte Moreno, Enrique; Torra Porras, Salvador (2018-01-01)
    Article
    Accés restringit per acord de confidencialitat
    In this study we present a geometric approach to proxy economic uncertainty. We design a positional indicator of disagreement among survey-based agents’ expectations about the state of the economy. Previous dispersion-based ...
  • Seabed mapping in coastal shallow waters using high resolution multispectral and hyperspectral imagery 

    Marcello, Javier; Eugenio, Francisco; Martín Abasolo, Javier; Marqués Acosta, Fernando (Multidisciplinary Digital Publishing Institute (MDPI), 2018-08-01)
    Article
    Accés obert
    Coastal ecosystems experience multiple anthropogenic and climate change pressures. To monitor the variability of the benthic habitats in shallow waters, the implementation of effective strategies is required to support ...
  • Compact fully uniplanar bandstop filter based on slow-wave multimodal CPW resonators 

    Contreras Bleda, Adrián; Ribó i Pal, Miquel; Pradell i Cara, Lluís; Raynal, Víctor; Moreno, Ignacio; Combes, Maxence; Ten, Milena (2018-07-26)
    Article
    Accés obert
    In this letter, a compact, fully uniplanar bandstop filter is presented. It is based on multimodal coplanar waveguide resonators implemented using a slow-wave periodic structure that greatly reduces the filter’s horizontal ...
  • Perspectiva de la gestión de recursos radio en las redes celulares 

    Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (Asociación de Técnicos de Informática, 2004-01)
    Article
    Accés obert
    Este artículo proporciona una visión del problema de la gestión de recursos radio (RRM Radio Resource Management) en el contexto de la evolución de los sistemas de comunicaciones móviles. Se enfatiza la importancia creciente ...
  • Impact of wind-induced scatterers motion on GB-SAR imaging 

    Lort Cuenca, Marc; Aguasca Solé, Alberto; López Martínez, Carlos; Fabregas Canovas, Francisco Javier (Institute of Electrical and Electronics Engineers (IEEE), 2018-08-13)
    Article
    Accés obert
    Ground-based synthetic aperture radar (GB-SAR) sensors represent a cost-effective solution for change detection and ground displacement assessment of small-scale areas in real-time early warning applications. GB-SAR systems ...

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