Now showing items 21-40 of 85

  • Application of hyperstability theory to interference cancelling 

    Bertran Albertí, Eduardo; Montoro López, Gabriel (O.YUKSEL IEEE, 1994)
    Conference report
    Open Access
    An alternative to the usual adaptive noise cancelling method devoted to removing interference is presented. In the conventional methodology to implement adaptive cancellers a reference signal is necessary correlated with ...
  • A recursive digital predistorter for linearizing RF power amplifiers with memory effects 

    Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Cesari Bohigas, Albert (2006-12)
    Conference lecture
    Open Access
    A nonlinear auto-regressive moving average (ARMA) structure capable of compensating nonlinear memory effects in RF power amplifiers is here presented. Results on the linearity improvement, in both in-band and out-of-band ...
  • Arquitecturas de transmisión inalámbrica de alta eficiencia 

    Gilabert Pinal, Pere Lluís; García, José Angel; de Mingo, Jesús; Montoro López, Gabriel; Cabria, Lorena; Marante, Reinel; García, Paloma; Sánchez, César; Bertran Albertí, Eduardo (2011)
    Conference report
    Open Access
  • Circuitos y sistemas lineales : curso de laboratorio 

    Bertran Albertí, Eduardo; Montoro López, Gabriel (Edicions UPC, 2000)
    Book
    Open Access
    Este curso se ha diseñado para una asignatura de Circuitos y Sistemas Lineales que tenga el objetivo de dar unos fundamentos teóricos contrastados con trabajos experimentales. Cada práctica de laboratorio está compuesta ...
  • Comissioning of the decelerator test beam line in CTF3 

    Adli, E; Döbert, Steffan; Lillestol, R; Olvegaard, M; Syratchev, I; Carrillo, David; Toral, Fernando; Faus-Golfe, Angeles; García-Garrigos, JJ; Koubychine Merkulov, Youri Alexandrovich; Montoro López, Gabriel (2010)
    Conference report
    Open Access
    The CLIC Test Facility (CTF3) at CERN was constructed by the CTF3 collaboration to study the feasibility of the concepts for a compact linear collider. The test beam line (TBL) recently added to the CTF3 machine was ...
  • Comparison of model order reduction techniques for digital predistortion of power amplifiers 

    Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Wang, Teng; Ruiz, Nieves; García García, José Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Open Access
    This paper compares and discusses four techniques for model order reduction based on compressed sensing (CS), less relevant basis removal (LRBR), principal component analysis (PCA) and partial least squares (PLS). CS and ...
  • Computationally efficient real-time digital predistortion architectures for envelope tracking power amplifiers 

    Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (2013-03-05)
    Article
    Open Access
    This paper presents and discusses two possible real-time digital predistortion (DPD) architectures suitable for envelope tracking (ET) power amplifiers (PAs) oriented at a final computationally efficient implementation ...
  • Constant-gain envelope tracking in a UHF outphasing transmitter based on continuousmode class-E GaN HEMT PAs 

    Ruiz Lavin, Maria de las Nieves; Benito, Adán L.; Pérez Cisneros, J. R.; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; García, J. A. (Institute of Electrical and Electronics Engineers (IEEE), 2016)
    Conference report
    Restricted access - publisher's policy
    A UHF outphasing transmitter, based on continuous-mode class-E power amplifiers (PAs) and implementing a constant-gain envelope tracking (ET) strategy, is presented in this paper. Drain terminating and biasing networks are ...
  • Continuous-time adaptive control applied to rf amplifier linearization 

    Bertran Albertí, Eduardo; Montoro López, Gabriel; Talavera Pedrol, Núria (O.YUKSEL IEEE, 1994)
    Conference report
    Open Access
    A new approach to the RF power amplifier linearization problem is presented. The proposed solution applies non-linear theories (Lyapunov direct method) to adaptive filtering in order to improve the linearity of the RF ...
  • Contribución al estudio y desarrollo de técnicas de control aplicadas a la linealización de sistemas 

    Montoro López, Gabriel (Universitat Politècnica de Catalunya, 1996-11-14)
    Doctoral thesis
    Open Access
    En esta Tesis se tratan varios aspectos relacionados con la linealización de sistemas no lineales. Las dificultades inherentes al empleo de técnicas de análisis, modelado y control de sistemas no lineales, son debidas en ...
  • 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)
    Conference lecture
    Open Access
    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 ...
  • Current status of the 12 MeV UPC race-track microtron 

    Koubychine Merkulov, Youri Alexandrovich; Berenguer Sau, Jordi; Crisol, A; Gonzalez, Xavier; Montoro López, Gabriel; Rigla Perez, Juan Pablo; Roure Fernández, Francisco; Carrillo, David; Garcia-Tabares, Luis; Toral, F; Lucas, J; Aloev, A.V.; Shvedunov, V.I. (2009)
    Conference lecture
    Open Access
    A com­pact race-track mi­crotron (RTM) with the max­i­mal out­put en­er­gy 12 MeV is under con­struc­tion at the Uni­ver­si­tat Politècnica de Catalun­ya (UPC) in col­lab­o­ra­tion with the Sko­belt­syn In­sti­tute of ...
  • Digital predistortion of envelope tracking amplifiers driven by slew-rate limited envelopes 

    Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Berenguer Sau, Jordi; Bertran Albertí, Eduardo (IEEE Microwave Theory and Techniques Society, 2011)
    Conference report
    Restricted access - publisher's policy
    This paper presents a new Digital Predistorter (DPD) to compensate for nonlinear distortion that arises in Envelope Tracking (ET) Power Amplifiers (PAs) driven by slew-rate limited versions of the real signal's envelope. ...
  • Diseño de un linealizador adaptativo y analógico para amplificadores de potencia 

    Bertran Albertí, Eduardo; Zozaya, A; Montoro López, Gabriel; Berenguer Sau, Jordi (Congrega, 2003)
    Conference report
    Open Access
  • Dynamic selection and update of digital predistorter coefficients for power amplifier linearization 

    Pham, Thi Quynh Anh; López Bueno, David; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís
    Conference lecture
    Restricted access - publisher's policy
    In this paper, a new method for dynamically estimating and updating the coefficients of a digital predistortion (DPD) linearizer is presented. By means of the partial least squares (PLS) algorithm, the basis matrix used ...
  • El transmisor sostenible 

    Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Bertran Albertí, Eduardo; Berenguer Sau, Jordi (2011-03-01)
    Article
    Open Access
  • Envelope amplifier based on a hybrid series converter with the slow-envelope technique 

    Cheng, P. M.; Garcia, O.; Vasic, M.; Alou, P.; Oliver, J. A.; Montoro López, Gabriel; Cobos, J. A. (2012)
    Conference report
    Restricted access - publisher's policy
    High frequency dc-dc switching converters are used as envelope amplifiers in RF transmitters. The dc-dc converter should operate at very high frequency to track an envelope in the MHz range to supply the power amplifier. ...
  • Envelope tracking amplification with reduced slew-rate and bandwidth envelopes 

    Vizarreta Paz, Pedro Pablo; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Bertran Albertí, Eduardo; Berenguer Sau, Jordi; Gelonch Bosch, Antonio José; García, José Angel (Unión Científica Internacional de Radio, 2012)
    Conference report
    Restricted access - publisher's policy
    This paper presents an Envelope Tracking Pow- er Amplifier whose architecture includes a Hybrid Envelope Amplifier (HEA) and an algorithm to adapt the envelope’s characteristics to the HEA’s limitations. The HEA attempts ...
  • Examen final 

    García Lozano, Mario; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Pérez Díaz de Cerio, David; Rodríguez Gómez, Alejandro Antonio; Spadaro, Salvatore; Tarrés Ruiz, Francisco (Universitat Politècnica de Catalunya, 2018-06-08)
    Exam
    Restricted access to the UPC academic community
  • Examen final 

    Sales Zaragozá, Vicente; Montoro López, Gabriel (Universitat Politècnica de Catalunya, 2018-06-05)
    Exam
    Restricted access to the UPC academic community