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Ara es mostren els items 21-40 de 109

    • An LMS-based adaptive predistorter for cancelling nonlinear memory effects in RF power amplifiers 

      Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Bertran Albertí, Eduardo; Cesari Bohigas, Albert; García, José Antonio (2007-12)
      Comunicació de congrés
      Accés obert
      This paper presents the design of an adaptive Digital Predistorter (DPD) for Power Amplifier (PA) linearization whoseimplementation and real time adaptation can be fully performed in a Field Programmable Gate Array (FPGA). ...

    • Análisis Comparativo de Técnicas de Reducción de PAPR en Señales OFDM 

      Lopez Caro, Alberto; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Bertran Albertí, Eduardo; Jové Casals, Jose M. (2009-09)
      Comunicació de congrés
      Accés obert

    • Aplicación de técnicas avanzadas de lienalización a sistemas de RF/microondas 

      García, J.A.; Bertran Albertí, Eduardo; Begrains, J.; Montoro López, Gabriel; Ares, F.; Cabria, L. (Editorial de la UPV, 2005)
      Text en actes de congrés
      Accés obert

    • Application of hyperstability theory to interference cancelling 

      Bertran Albertí, Eduardo; Montoro López, Gabriel (O.YUKSEL IEEE, 1994)
      Text en actes de congrés
      Accés obert
      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 ...

    • 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)
      Text en actes de congrés
      Accés obert

    • Beyond the Moore-Penrose inverse: Strategies for the estimation of digital predistortion linearization parameters 

      Gilabert Pinal, Pere Lluís; Braithwaite, R. Neil; Montoro López, Gabriel (2020-12)
      Article
      Accés obert
      Digital predistortion (DPD) is the linearization technique most often used to cope with the inherent tradeoff between linearity and efficiency in power amplifiers (PAs). Adaptation is needed to optimize DPD performance. ...

    • Circuitos y sistemas lineales : curso de laboratorio 

      Bertran Albertí, Eduardo; Montoro López, Gabriel (Edicions UPC, 2000)
      Llibre
      Accés obert
      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)
      Text en actes de congrés
      Accés obert
      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)
      Text en actes de congrés
      Accés obert
      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
      Accés obert
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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)
      Text en actes de congrés
      Accés obert
      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)
      Tesi
      Accés obert
      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)
      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 ...

    • 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)
      Comunicació de congrés
      Accés obert
      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 ...

    • Dataset reduction for neural network based digital predistorters under strong nonlinearities 

      López Bueno, David; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Text en actes de congrés
      Accés obert
      The artificial neural networks (ANN) are gaining momentum in the digital predistorters (DPD) thanks to their inherently good approximation capabilities. Under strong or complex power amplifier nonlinearities, the size of ...

    • Design and digital predistortion linearization of a wideband outphasing amplifier supporting 200 MHz bandwidth 

      Gilabert Pinal, Pere Lluís; Vegas, David; Ren, Zhixiong; Montoro López, Gabriel; Pérez-Cisneros, José Ramón; Ruiz, Nieves; Si, Xiaoshu; García García, José Ángel (2020)
      Text en actes de congrés
      Accés obert
      This paper presents a holistic approach to design and linearize a wideband outphasing power amplifier (PA) to efficiently amplify a 200 MHz bandwidth (BW) signal compliant with the Data Over Cable Service Interface ...

    • Digital linearization of wideband envelope tracking power amplifiers for mobile terminals 

      Li, Wantao; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (IEEE Microwave Theory and Techniques Society, 2023-01)
      Article
      Accés obert
      This article presents a low-complexity linearization method to compensate for multisource nonlinear distortion in wideband envelope tracking (ET) power amplifiers (PAs) for 5G new radio (NR) mobile terminals. The proposed ...

    • Digital predistorters go multidimensional: DPD for concurrent multiband envelope tracking and outphasing power amplifiers 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Vegas Garcia, Ángel; Ruiz Lavin, Maria de las Nieves; García García, José Ángel (2019-05-01)
      Article
      Accés obert
      Over at least the last two decades, digital predistortion (DPD) has become the most common and widespread solution to cope with the power amplifier's (PA's) inherent linearity-versus-efficiency tradeoff. When compared with ...

    • Digital predistortion linearization of a GaN HEMT push-pull power amplifier for cable applications with high fractional bandwidth 

      Gilabert Pinal, Pere Lluís; Pérez-Cisneros, José Ramón; Ren, Zhixiong; Montoro López, Gabriel; Ruiz Lavin, Maria de las Nieves; García García, José Ángel (2023-03-07)
      Article
      Accés obert
      This paper presents two linearization strategies for a custom-designed wideband push-pull (PP) power amplifier (PA) for wired communication applications such as, for example, cable TV. Two digital predistortion (DPD) ...