Enviaments recents

  • Estudio de la congestion en subcanales HF en un enlace entre Madrid y Barcelona 

    Valle Alarcón, Rafael; Serrat Fernández, Juan; Delgado Penin, José A. (1991)
    Text en actes de congrés
    Accés obert
    We have presented here the result of an investigation done during a year measuring the
  • A Real time simulation model for Lognormal Fading channels 

    Delgado Penin, José A.; Serrat Fernández, Juan (1991)
    Text en actes de congrés
    Accés obert
    In this paper we present a mathematical model for the simulation of lognormal fading channels. A modeling technique and its validation by computer simulation are described with special emphasis on the aspects related to ...
  • Simulación digital con topsim de un sistema TCM-8PSK con estrategia de recepción inusual 

    Delgado Penin, José A.; Serrat Fernández, Juan (1991)
    Text en actes de congrés
    Accés obert
    An 8 state TCM- BPSK system i s analy zed by simulation techniques.It is proposed a system model where trace-back decoding is used.Simulation results using TOPSIM III are presented.The system error rate is evaluated and ...
  • Analisis espectral de codigos adaptativos de longitud variable 

    Delgado Penin, José A. (1991)
    Text en actes de congrés
    Accés obert
    The algorithm for the power spectral density of a block code proposed by Cariolaro/Tronca has been used to obtain continuous and discrete spectra components of line codes .Novel adaptive binary and multilevel codes are ...
  • Analisis del codigo de linea 2blq en bucle de abonado digital con diafonia 

    Delgado Penin, José A. (1991)
    Text en actes de congrés
    Accés obert
    The 2BlQ line code is selected to study a digital line transmission system for support of ISDN basic access on 2- wire metallic subscriber .The selection of the line code is conditioned by the problem of the near-end ...
  • A dual-band outphasing transmitter using broadband class E power amplifiers 

    Ruiz, Maria Nieves; Marante, Reinel; Rizo, Leysi; García, José Angel; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper, a dual-band outphasing transmitter (able of operating either at 770 MHz or 960 MHz frequency bands) is presented. Two broadband RF power amplifiers (PAs) have been designed over packaged GaN HEMT devices, ...
  • A low-complexity memoryless model for envelope tracking RF power amplifiers 

    Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; García García, José Ángel; Ruiz Lavin, Maria de las nieves; Marante, Reinel (European Microwave Association (EuMA), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents a new kind of behavioral model structure for characterizing static nonlinearities in dynamically supplied RF power amplifiers. The proposed architecture is based on the combination of several basic cells ...
  • Control system of a miniature 12 MeV race-track microtron 

    Koubychine Merkulov, Youri Alexandrovich; Blasco Argente, Vicente Pablo; Romero, Juan Antonio; Sánchez, Alexandre; Montoro López, Gabriel; Shvedunov, Vasiliy (2014)
    Comunicació de congrés
    Accés obert
    A simple control system has been developed for the commissioning of a compact 12 MeV race-track microtron which is under construction at the Technical University of Catalonia. It is of modular structure and is based ...
  • Peak cancellation and digital predistortion of high-order QAM wideband signals for next generation wireless backhaul equipment 

    López Bueno, David; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Bartzoudis, Nikolaos (2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper evaluates the linearity performance in a wideband wireless backhaul transmitter when applying crest factor reduction (CFR) and digital predistortion (DPD) techniques to enhance the transmitted output power, and ...
  • Slew-rate and efficiency trade-off in slow envelope tracking power amplifiers 

    Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Vizarreta Paz, Pedro Pablo (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper presents a study on the trade-off between the envelope's slew-rate and the drain efficiency when slower envelopes are considered to dynamically supply the power amplifier (PA). This paper discusses a method to ...

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