Enviaments recents

  • 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 ...
  • 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 ...
  • 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 ...
  • Separation of the optical and mass features of particle components in different aerosol mixtures by using POLIPHON retrievals in synergy with continuous polarized Micro-Pulse Lidar (P-MPL) measurements 

    Cordoba Jabonero, Carmen; Sicard, Michaël; Ansmann, Albert; del Aguila, Ana; Baars, Holger (2018-08-15)
    Article
    Accés obert
    The application of the POLIPHON (POlarization-LIdar PHOtometer Networking) method is presented for the first time in synergy with continuous 24/7 polarized Micro-Pulse Lidar (P-MPL) measurements to derive the vertical ...
  • Bandgap widening in macroporous silicon photonic crystals by multiperiodic structures 

    Segura García, Daniel; Cardador Maza, David; Vega d'Aurelio, Davide; Santos Blanco, M. Concepción; Dios Otín, Víctor Federico; Rodríguez Martínez, Ángel (Institute of Physics (IOP), 2018-05-14)
    Article
    Accés obert
    Large bandgaps with low transmission in 3D macroporous silicon photonic crystals have been proved as an interesting technology for the development of optical filters and spectroscopic MIR gas sensors. The aim of this study ...
  • Dielectric properties of colon polyps, cancer, and normal mucosa: Ex vivo measurements from 0.5 to 20 GHz 

    Guardiola, Marta; Buitrago Ventura, Santiago; Fernández-Esparrach, Glòria; O'Callaghan Castellà, Juan Manuel; Romeu Robert, Jordi; Cuatrecasas, Miriam; Córdoba, Henry; González Ballester, Miguel A.; Camara, Oscar (2018-06-15)
    Article
    Accés restringit per política de l'editorial
    Colorectal cancer is highly preventable by detecting and removing polyps, which are the precursors. 20 Currently, the most accurate test is colonoscopy, but still misses 22% of polyps due to visualization limitations. In ...

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