Now showing items 1-20 of 347

  • 60GHz channel characterization using a Scatterer Mapping Technique 

    Papió, Anna; Grau, Alfred; Balcells Ventura, Jordi; Romeu Robert, Jordi; Jofre Roca, Lluís; Flaviis, Franco de (2010)
    Conference report
    Open Access
    In this paper, a Scatterer Mapping Technique based on a Multi-Frequency Bi-focusing operator with good imaging capabilities is used to characterize the 60GHz wireless channel in an office environment. The measurement data ...
  • A BPSK superregenerative receiver. Preliminary results 

    Palà Schönwälder, Pere; Moncunill Geniz, Francesc Xavier; Bonet Dalmau, Jordi; Águila López, Francisco del; Giralt Mas, Ma. Rosa (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-05)
    Conference report
    Open Access
    This paper describes a bit-synchronous superregenerative receiver suitable for BPSK demodulation. The output of the superregenerative oscillator (SRO), which reproduces the phase information of the input signal, is ...
  • A calibration method for fully polarimetric microwave radiometers 

    Lahtinen, J..; Gasiewski, A.J.; Klein, M.; Corbella Sanahuja, Ignasi (IEEE Press. Institute of Electrical and Electronics Engineers, 2003-03)
    Article
    Open Access
    A technique for absolute end-to-end calibration of a fully polarimetric microwave radiometer is presented. The technique is based on the tripolarimetric calibration technique of Gasiewski and Kunkee, but is extended to ...
  • A channel allocation algorithm for OSA-Enabled IEEE 802.11 WLANs 

    Novillo Parales, Francisco Vicente; Churchman, Mathew; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon (2009-09)
    Conference report
    Open Access
    Channel allocation problem is a major challenge in wireless local area networks (WLANs), especially in dense deployments of access points (APs) where congestion of the unlicensed spectrum bands (i.e., ISM bands) could ...
  • A channel allocation algorithm for OSA-Enabled IEEE 802.11 WLANs 

    Novillo Parales, Francisco Vicente; Churchman, Mathew; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon (2009)
    Conference report
    Open Access
    Channel allocation problem is a major challenge in wireless local area networks (WLANs), especially in dense deployments of access points (APs) where congestion of the unlicensed spectrum bands (i.e., ISM bands) could ...
  • A cross-layer scheduling strategy for the downlink of a MIMO-OFDMA system with heterogeneous traffic 

    Tralli, V.; Pérez Neira, Ana Isabel; Henarejos Hernández, Pol (2009)
    Conference report
    Open Access
    in this paper we propose and investigate a cross-layer multiuser scheduling strategy for the support of heterogeneous traffic in the downlink of a MIMO-OFDMA system. It jointly considers different objectives: maximize ...
  • Adaptació de la plataforma dinamomètrica per l'anàlisi de la sortida de tacs en l'atletisme 

    Pellitero Cornet, Laura (Universitat Politècnica de Catalunya, 2016-06-08)
    Bachelor thesis
    Open Access
    Aquest projecte comença amb la voluntat pròpia de que estigués relacionat amb l’esport. Per poder-ho realitzar millor és va fer amb simultaneïtat les pràctiques i el projecte en el Centre d’Alt Rendiment (CAR) de Sant ...
  • Adaptive sampling for fast sparsity pattern recovery 

    Ramírez Javega, Francisco; Matas Navarro, David; Lamarca Orozco, M. Meritxell (2011)
    Conference report
    Open Access
    In this paper we propose a low complexity adaptive algorithm for lossless compressive sampling and reconstruction of sparse signals. Consider a sparse non-negative real signal x containing only 𝑘 << 𝑛 non-zero values. ...
  • Aerosol lidar intercomparison in the framework of SPALINET-The Spanish lidar network: methodology and results 

    Rocadenbosch Burillo, Francisco; Sicard, Michaël; Molero, Francisco; Guerrero Rascado, Juan Luis; Pedrós, Roberto; Expósito, Francisco Javier; Córdoba Jabonero, Carmen; Bolarín, Jose Miguel; Comerón Tejero, Adolfo; Moreno, José Maria; Navas Guzmán, Francisco; Requena, Alberto; Gil, Manuel; Pedro Díaz, Juan; Martínez Lozano, José Antonio; Alados Arboledas, Lucas; Pujades, Manuel (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-10)
    Article
    Open Access
    Abstract—A group of eight Spanish lidars was formed in order to extend the European Aerosol Research Lidar Network–Advanced Sustainable Observation System (EARLINET-ASOS)project. This study presents intercomparisons at the ...
  • Aerosol stratification characterization of an astronomical site by means of a backscatter lidar at the Roque de los Muchachos Observatory 

    Jiménez Fuensalida, Jesús; Muñoz Tuñón, Casiana; Sicard, Michaël; Tomás Martínez, Sergio; Md. Reba, Mohd Nadzri; Comerón Tejero, Adolfo; Batet Torrell, Óscar; Muñoz Porcar, Constantino; Rodríguez Gómez, Alejandro Antonio; Rocadenbosch Burillo, Francisco (2009)
    Conference report
    Open Access
    The Roque de los Muchachos Observatory, located on the island of La Palma in the Canary Islands, is home of many astronomical facilities. In the context of the Extremely Large Telescope Design Study, an intensive lidar ...
  • A field study on satellite and cellular 

    Gete-Alonso Roldán, Óscar; Martín Escalona, Israel; Barceló Arroyo, Francisco (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
    Conference report
    Restricted access - publisher's policy
    This article presents a statistical study on the availability of location sources. In particular, it rates the availability of cellular network base stations and GPS satellites in urban scenarios. Individual and joint ...
  • A field study on the fusion of terrestrial and satellite location methods in urban cellular networks 

    Barceló Arroyo, Francisco; Martín Escalona, Israel; Manente, Cyrille (2010-05-01)
    Article
    Restricted access - publisher's policy
    This work studies the improvement in service coverage obtained by three different approaches to combining two triangulation (terrestrial and satellite) location methods for cellular networks in an urban environment. The ...
  • A graph-based strategy to streamline translation quality assessments 

    Pighin, Daniele; Formiga Fanals, Lluís; Màrquez Villodre, Lluís (2012)
    Conference report
    Open Access
    We present a detailed analysis of a graph- based annotation strategy that we employed to annotate a corpus of 11,292 real-world En- glish to Spanish automatic translations with relative (ranking) and absolute ...
  • Albayzin 2010 Evaluation campaign: speaker diarization 

    Zelenak, Martin; Schulz, Henrik; Hernando Pericás, Francisco Javier (2010)
    Conference lecture
    Open Access
    In this paper we present the evaluation results for the task of speaker diarization in broadcast news domain as part of the Albayzin 2010 evaluation campaign of language and speech technologies. The evaluation data was ...
  • A linear transform for spectral estimation 

    Lagunas Hernandez, Miguel A.; Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo; Carol Vilanova, Antonio (1981-10)
    Article
    Open Access
  • A long Saharan dust event over the western Mediterrranean: Lidar, Sun photometer observations and regional dust modelling. 

    Pérez, Carlos; Nickovic, S.; Baldasano Recio, José María; Sicard, Michaël; Rocadenbosch Burillo, Francisco; Cachorro, V.E. (2006-08-31)
    Article
    Open Access
    A long Saharan dust event affected the western Mediterranean in the period 12– 28 June 2002. Dust was present mainly between 1- and 5-km height affecting most parts of the Iberian Peninsula and reaching western/central ...
  • A maximum approach for robust MIMO design: combining OSTBC and beamforming with minimum transmission power requirements 

    Pascual Iserte, Antonio; Pérez Neira, Ana Isabel; Lagunas Hernandez, Miguel A. (2004)
    Conference report
    Open Access
    In this paper we address the problem of the design of a transmitter in a Multi-Input-Multi-Output (MIMO) space diversity system. We consider a design which is robust to errors in the channel estimate available at the ...
  • A miniaturized two axis sun sensor for attitude control of nano-satellites 

    Angulo, M.; Gras, Ana; Ortega Villasclaras, Pablo Rafael; López Rodríguez, Gema; Ricart Campos, Jordi; Domínguez Pumar, Manuel; Castañer Muñoz, Luis María; Quero, J.M.; Tarrida, C. L.; Reina, M. (2010-10-10)
    Article
    Open Access
    This paper describes the design, fabrication, characterization, and satellite integration of a miniaturized two axis sun sensor which has been used in the attitude control system of the Spanish nano-satellite NANOSAT-1B. ...
  • An adaptive design of an all-zero spectral estimator 

    Lagunas Hernandez, Miguel A.; Figueiras Vidal, Aníbal R.; Mariño Acebal, José Bernardo (Institute of Electrical and Electronics Engineers (IEEE), 1981)
    Conference report
    Open Access
  • Análisis de stubs radiales en circuito abierto como elementos de circuito microstrip 

    de los Reyes, Elías; Ferrando, Miguel; Comerón Tejero, Adolfo (Unión Científica Internacional de Radio (URSI), 1983)
    Conference report
    Open Access
    This paper presents an analysis of radial microstrip transmission lines, practical design corrections and comparison with measurements perfomed on Duroid 5880. It is proposed the use of the radial lines in combination with ...