Ara es mostren els items 1-20 de 102

    • 3-D distributed memory polynomial behavioral model for concurrent dual-band envelope tracking power amplifier linearization 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (IEEE Microwave Theory and Techniques Society, 2015-02-01)
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      This paper presents a new 3-D behavioral model to compensate for the nonlinear distortion arising in concurrent dual-band (DB) Envelope Tracking (ET) Power Amplifiers (PAs). The advantage of the proposed 3-D distributed ...
    • 3D digital predistortion for dual-band envelope tracking power amplifiers 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; López Bueno, David; García García, José Ángel (2013)
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      This paper proposes a novel three-dimensional digital predistorter (3D-DPD) suitable for compensating nonlinear distortion in dual-band (DB) envelope tracking (ET) power amplifiers (PAs). By taking into account the ...
    • A class of stable nonlinear systems for modelling memory effects in RF power amplifiers 

      Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Berenguer Sau, Jordi; Bertran Albertí, Eduardo (Escuela Politécnica Superior Ingeniería Gijón, 2006)
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    • 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)
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      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 full FPGA-based implementation of an adaptive digital predistorter 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Bertran Albertí, Eduardo (University California San Diego, 2009)
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    • 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)
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      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 ...
    • A method for real-time generation of slew-rate limited envelopes in envelope tracking transmitters 

      Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Bertran Albertí, Eduardo; Berenguer Sau, Jordi (2010-02)
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    • A method for selecting online the coefficients to be updated in a DPD for PA linearization 

      Pham, Thi Quynh Anh; Montoro López, Gabriel; López Bueno, David; Gilabert Pinal, Pere Lluís (2019)
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      This paper presents a technique for selecting onlinethe coefficients to be updated in a digital predistorter (DPD)based on direct learning. The proposed method, which is basedon a combination of matching pursuit (MP) and ...
    • A new digital predictive predistorter for behavioral power amplifier linearization 

      Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Bertran Albertí, Eduardo; Cesari Bohigas, Albert; Silveira, Daniel D. (Institute of Electrical and Electronics Engineers (IEEE), 2007-06)
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      This letter presents a new digital adaptive predistorter (PD) for power amplifier (PA) linearization based on a nonlinear auto-regressive moving average (NARMA) structure. The distinctive characteristic of this PD is ...
    • A recursive digital predistorter for linearizing RF power amplifiers with memory effects 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Cesari Bohigas, Albert (2006-12)
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      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 ...
    • Adaptive envelope shaping for low and medium power amplifiers with dynamic supply 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Ruiz Lavin, Maria de las Nieves; García Antón, José A. (2016-07-01)
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      This letter presents an adaptive envelope shaping (AES) method to linearize low and medium power amplifiers (PAs) with dynamic supply. This straightforward linearization solution results very useful for small cell or handset ...
    • Adaptive principal component analysis for online reduced order parameter extraction in PA behavioral modeling and DPD linearization 

      Pham, Thi Quynh Anh; López Bueno, David; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2018)
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      This paper presents a new method, based on the adaptive principal component analysis (APCA) technique, that iteratively creates and updates an orthogonal data matrix used to estimate the parameters of power amplifier (PA) ...
    • Advanced design features of Doherty power amplifiers 

      Bertran Albertí, Eduardo; Gilabert Pinal, Pere Lluís; Berenguer Sau, Jordi (Unión Científica Internacional de Radio, 2012)
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      A Doherty power amplifier (DPA) is an effective structure born in 1936 which, after a scarce revival around year 2000), had been strengthened from 2005 because its capability to combine linear amplification with power ...
    • Agnostic envelope linearization of dynamically supplied power amplifiers for mobile terminals 

      Li, Wantao; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (Multidisciplinary Digital Publishing Institute (MDPI), 2022-05-16)
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      This paper presents an envelope linearization technique to compensate for the nonlinear distortion of envelope tracking (ET) power amplifiers (PAs) for 5G new radio (NR) mobile terminals. The proposed envelope optimization ...
    • Amping up, saving power 

      López Bueno, David; Wang, Teng; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (2016-01-01)
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      Fourth-generation (4G) communication systems based on orthogonal frequency division multiplexing (OFDM) and the proposed backwards compatible fifth-generation (5G) variants, like filter-bank multicarrier (FBMC), are based ...
    • An efficient combination of digital predistortion and OFDM clipping for power amplifiers 

      Gilabert Pinal, Pere Lluís; Gadringer, Michael E.; Montoro López, Gabriel; Mayer, M.L.; Silveira, Daniel D.; Bertran Albertí, Eduardo; Magerl, G. (2009-09)
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    • 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)
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      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). ...
    • Analysis of inter-modulation products and nonlinear distortion in RF OFDM transmitter systems 

      O'Droma, M; Lei, Y; Bertran Albertí, Eduardo; Gilabert Pinal, Pere Lluís (IEEE, 2009)
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    • Analysis of variations of volterra series models for RF power amplifiers 

      Silveira, Daniel D.; Gilabert Pinal, Pere Lluís; Dos Santos, Alexandre B.; Gadringer, Michael E. (2013)
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      This article discusses several different implementations of Volterra seriesmodels, and performs a fair comparison between them using measured data and well known figures of merit. Among the implemented models, an approach ...
    • 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)
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