Enviaments recents

  • SHAPER: demostrador experimental de técnicas de linealización digital de amplificadores de potencia para acceso y backhaul inalámbrico 4G/5G 

    López Bueno, David; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Bartzoudis, Nikolaos; Font Bach, Oriol (Universidad Autónoma de Madrid, 2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The waveforms being employed by fourthgeneration (4G) and candidate fifth-generation (5G) radio access and wireless backhaul technologies are based on modulation techniques that allow significantly increased spectral ...
  • Reducción del orden del modelo de predistorsión digital para amplificadores de potencia mediante la regularización de Ridge 

    Mozos Ruiz, José Miguel; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (Universidad Autónoma de Madrid, 2016)
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    Accés restringit per política de l'editorial
    This paper addresses a model order reduction technique based on Ridge’s regression for power amplifier (PA) behavioral models to be used in digital predistortion (DPD) linearization applications. Commonly, the DPD ...
  • 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)
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    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 ...
  • Self-similar current distribution on fractal Sierpinski antenna verified with infrared thermograms 

    González Arbesú, José María; Puente Baliarda, Carles; Romeu Robert, Jordi; Aguasca Solé, Alberto (Institute of Electrical and Electronics Engineers (IEEE), 1999)
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    Accés obert
    Experimental verification of the fractal Sierpinski antenna surface current distribution is presented. Measured data from an infrared camera agree with numerical data showing a self-similar behavior in the current density ...
  • A lateral modes model for BAW resonators 

    Collado Gómez, Juan Carlos; Rocas Cantenys, Eduard; Verdú, Jordi; Mateu Mateu, Jordi; Hueltes Escobar, Alberto; Aigner, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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    Accés restringit per política de l'editorial
    An equivalent circuit model to predict lateral modes occurring in real BAW resonators is proposed. The circuit model has been validated with FEM simulations of FBAR resonators and also with measurements of SMR resonators. ...
  • 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)
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    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 ...
  • Novel formulation of coefficients of low-pass prototype filter for the design of fourelement planar filtering antenna array 

    Kufa, Martin; Raida, Zbynek; Mateu Mateu, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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    The paper is focused on a formulation of a new coefficient of the low-pass prototype filter for the design of a four-element filtering antenna array. Due to the new gicoefficients, we can comfortably and easily control a ...
  • Sistema en banda X para la reconstrucción de imágenes 

    Jofre Roca, Lluís; Ferrando Bataller, Miquel; de los Reyes, Elías; Berenguer Sau, Jordi; Sorolla, M. (1984)
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    Accés obert
    This paper describes the theoretical study and experimental set-up for a quasi-real-time active microwave imaging system in band- X. The main contributions are related to the spectral algoritms for the reconstruction ...
  • Multiplicador de frecuencias PLL con detector de fase armónico 

    Berenguer Sau, Jordi; Comerón Tejero, Adolfo (Unión Científica Internacional de Radio (URSI), 1986)
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    Accés obert
    An indirect synthesis frequency multiplier at microwave frequencies is presented. A microstrip balanced mixer implemented with a 90 hybrid is used as phase detector, to compare directly phases of signals at 9 and 27 GHz. ...
  • 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)
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    Accés restringit per política de l'editorial
    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. ...

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