Enviaments recents

  • Auction-based offloading for base station switching off in Heterogeneous Networks 

    Bousia, Alexandra; Kartsakli, Elli; Antonopoulos, Angelos; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The emerging traffic demand has triggered an impressive deployment of network infrastructure, including macro Base Stations (BSs) and Small Cells (SCs), leading to increased energy consumption and expenditures. However, ...
  • A novel MAC protocol based on distributed queues for CDMA communication systems 

    Alonso Zárate, Luis Gonzaga; Agustí Comes, Ramon; Sallent Roig, José Oriol (1999)
    Text en actes de congrés
    Accés obert
    This paper presents and analyses a new near-optimum medium access control (MAC) protocol. The proposed access scheme is suitable for a CDMA mobile communication environment and minimises the total number of spreading codes ...
  • Evaluación de las prestaciones de un receptor óptico coherente incluyendo ruido AM y FM 

    Ruiz Boqué, Sílvia; Junyent Giralt, Gabriel (Universidad Politécnica de Madrid (UPM), 1988)
    Text en actes de congrés
    Accés obert
    In this paper an evaluation of the performance of a coherent optical receiver for binary PSK has been carried out by means of the signal to noise ratio and BER calculation. Both the AM and FM noise due to transmitter and ...
  • Receptor PSK homodino por fibra óptica: influencia del retardo en el PLL con decisión guiada 

    Ruiz Boqué, Sílvia; Junyent Giralt, Gabriel (Universidad Politécnica de Madrid (UPM), 1988)
    Text en actes de congrés
    Accés obert
    A delay in homodyne PSK receivers with decision-driven Phase Locked-Loop is needed to equalize the transit time in the arms. This work shows a study about the effect of this delay over the phase variance and the receiver ...
  • Secciones en cascada fibra-amplificador óptico: evaluación de las prestaciones introducidas en comunicadciones por fibra óptica con detección heterodina 

    Junyent Giralt, Gabriel; Ruiz Moreno, Sergio; Ruiz Boqué, Sílvia (Consejo Superior de Investigaciones Científicas (CSIC), 1986)
    Text en actes de congrés
    Accés obert
    This paper deals with the performances of a coherent optical fiber transmission link with linear optical-amplifiers chains in which identical sections of attenuating fiber alternate with identical amplifiers. The overall ...
  • Performance of the optical amplifier in fiber digital transmission systems with timing uncertainty 

    Junyent Giralt, Gabriel; Ruiz Moreno, Sergio; Ruiz Boqué, Sílvia (1989)
    Text en actes de congrés
    Accés obert
    The authors analyze the signal-to-noise ratio (SNR) at the photodetector output for a single-mode fiber optic digital transmission system including online optical amplifiers and an optical preamplifier. The effect of timing ...
  • Laser noise impact in the design of an heterodyne optical PSK receiver 

    Ruiz Boqué, Sílvia; Junyent Giralt, Gabriel (1989)
    Text en actes de congrés
    Accés obert
    An evaluation of the performance of a coherent optical receiver for binary PSK (phase-shift keying) is carried out. Both AM and FM noise due to transmitter and local oscillator semiconductor lasers have been taken into ...
  • Receptor óptico para PSK homodino con estrcutra de PLL con decisión guiada 

    Vall-Llossera Ferran, Mercedes Magdalena; Ruiz Boqué, Sílvia; Junyent Giralt, Gabriel (Institución ferial de Madrid (IFEMA), 1988)
    Text en actes de congrés
    Accés obert
    The purpose of this paper is the study of homodyne optical receivers for PSK modulations, using a direct-decision’s scheme, that is a Costas loop scheme’s modification. After optimimizing receiver parameters we bound the ...
  • Cancelación del ruido AM en sistemas de transmisión coherentes por fibra óptica: receptor balanceado 

    Ruiz Boqué, Sílvia; Junyent Giralt, Gabriel (Institución ferial de Madrid (IFEMA), 1988)
    Text en actes de congrés
    Accés obert
    In this work the authors have studied the AM noise influence over coherent transmission systems employing heterodyne-type detection. A dual-detector optical heterodyne receiver is also studied in arder to eliminate the LO ...
  • GREENET – An early stage training network in enabling technologies for green radio 

    Alonso Zárate, Luis Gonzaga; Di Renzo, Marco; Fitzek, Frank H.P.; Granelli, Fabrizio (Institute of Electrical and Electronics Engineers (IEEE), 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper, we describe GREENET (an early stage training network in enabling technologies for green radio), which is a new project recently funded by the European Commission under the auspices of the 2010 Marie Curie ...

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