Ara es mostren els items 77-96 de 102

    • Reconfigurable DPD based on ANNs for wideband load modulated balanced amplifiers under dynamic operation from 1.8 to 2.4 GHz 

      Guillena Berenguer, Estefanía; Li, Wantao; Montoro López, Gabriel; Quaglia, Roberto; Gilabert Pinal, Pere Lluís (IEEE Microwave Theory and Techniques Society, 2021-01-01)
      Article
      Accés obert
      This article proposes a methodology to ensure linear amplification of a load modulated balanced amplifier (LMBA) while keeping the power efficiency as high as possible over a frequency band ranging from 1.8 to 2.4 GHz and ...
    • Reducción de factor de cresta y predistorsión digital de señales QAM de banda ancha para equipos backhaul de próxima generación 

      López Bueno, David; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Bartzoudis, Nikolaos; Payaró Llisterri, Miquel (Unión Científica Internacional de Radio (URSI), 2015)
      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, ...
    • Reducción de la frecuencia de muestreo en los conversores ADC y DAC usados en predistorsionadores digitales 

      Montoro López, Gabriel; Wang, Teng; López Bueno, David; Ruiz, María Nieves; García, José Angel; Gilabert Pinal, Pere Lluís (Unión Científica Internacional de Radio (URSI), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      With the increasing demands for higher data rate, wider signal bandwidth is required, and this imposes high sampling rate converters in the communications equipment. This paper provides and analyzes experimental results ...
    • 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)
      Text en actes de congrés
      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 ...
    • Resource management implications and strategies for SDR clouds 

      Gómez Miguelez, Ismael; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Gelonch Bosch, Antonio José; Marojevic, Vuk (2012-09-19)
      Article
      Accés restringit per política de l'editorial
      This paper analyzes the computing resource management implications of SDR base stations implemented as SDR clouds. SDR clouds describe distributed antennas that connect to a data center for digital signal processing. ...
    • Resource management strategies for SDR clouds 

      Marojevic, Vuk; Gómez Miguelez, Ismael; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Gelonch Bosch, Antonio José (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper analyzes different resource management strategies for SDR base stations implemented as SDR clouds. SDR clouds describe distributed antennas that connect to a data center for digital signal processing. The data ...
    • RF leakage compensation in wideband envelope tracking power amplifiers for mobile terminals 

      Li, Wantao; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (2022)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper presents a new linearization method to compensate for the unwanted RF leakage that appears at the ouput of envelope tracking modulators (ETMs) when operating envelope tracking (ET) power amplifiers (PAs) with ...
    • SDR tools and projects for electrical engineering education 

      Marojevic, Vuk; Gómez Miguelez, Ismael; Arteaga, Xavier; Gilabert Pinal, Pere Lluís; Gelonch Bosch, Antonio José (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper focuses on the software-defined radio (SDR) educational aspects. We describe a few recent SDR projects and tools that were developed as part of a graduate electrical engineering course at the School on ...
    • Seguimiento de la envolvente con ganancia constante mediante esquema outphasing en tecnología GaN HEMT 

      Benito, Adán L.; Ruiz, María Nieves; García García, José Ángel; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (Unión Científica Internacional de Radio (URSI), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A UHF outphasing transmitter, based on parallelcircuit Class E power amplifiers (PAs) and implementing a constant-gain envelope tracking strategy, is presented in this paper. Using the nonlinear model of the selected ...
    • 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 ...
    • 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
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      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 ...
    • Slew-rate and efficiency trade-off in slow envelope tracking power amplifiers 

      Vizarreta Paz, Pedro Pablo; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (2012-12-12)
      Article
      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 ...
    • Slew-rate limited envelopes for driving envelope tracking amplifiers 

      Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Vizarreta Paz, Pedro Pablo; Bertran Albertí, Eduardo (IEEE Microwave Theory and Techniques Society, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents a practical application of a method for generating slew-rate limited envelopes in order to drive the dynamic supply of envelope tracking (ET) power amplifiers (PAs). The proposed method results useful ...
    • Slow-envelope shaping function FPGA implementation for 5G NR envelope tracking PA 

      Li, Wantao; Bartzoudis, Nikolaos; Rubio Fernández, José; López Bueno, David; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper focuses on the FPGA implementation of a slew-rate reduction (SR) shaping function for envelope tracking (ET) power amplifiers (PAs). The SR envelope has been proved effective to trade-off power efficiency and ...
    • Spectral weighting orthogonal matching pursuit algorithm for enhanced out-of-band digital predistortion linearization 

      Gilabert Pinal, Pere Lluís; López Bueno, David; Montoro López, Gabriel (2018-01-01)
      Article
      Accés obert
      This paper presents a new variant of the orthogonal matching pursuit (OMP) algorithm for reducing the computational complexity of the digital predistortion (DPD) behavioral model in the forward path. The proposed spectral ...
    • STCSC-OT: Control: primavera 2019 

      García Lozano, Mario; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Pérez Díaz de Cerio, David; Spadaro, Salvatore; Tarrés Ruiz, Francisco (Universitat Politècnica de Catalunya, 2019-03-20)
      Examen
      Accés restringit a la comunitat UPC
    • STCSC-OT: Control: primavera 2019 

      García Lozano, Mario; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Pérez Díaz de Cerio, David; Spadaro, Salvatore; Tarrés Ruiz, Francisco (Universitat Politècnica de Catalunya, 2019-05-08)
      Examen
      Accés restringit a la comunitat UPC
    • STCSC-OT: Examen: primavera 2019 

      García Lozano, Mario; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Pérez Díaz de Cerio, David; Spadaro, Salvatore; Tarrés Ruiz, Francisco (Universitat Politècnica de Catalunya, 2019-05-31)
      Examen
      Accés restringit a la comunitat UPC
    • STCSC-OT: Examen: primavera 2019 

      García Lozano, Mario; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Pérez Díaz de Cerio, David; Spadaro, Salvatore; Tarrés Ruiz, Francisco (Universitat Politècnica de Catalunya, 2019-04-05)
      Examen
      Accés restringit a la comunitat UPC
    • Technologies for emergency rollout of broadband public protection and disaster relief (BB-PPDR) communications in humanitarian crisis zones 

      López Bueno, David; Bartzoudis, Nikolaos; Font Bach, Oriol; Caus, Marius; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (The Institution of Engineering and Technology, 2020-08-15)
      Capítol de llibre
      Accés restringit per política de l'editorial
      The ongoing migration flows of refugees and immigrants who escape from war and conflict zones to seek asylum and stable living conditions in European countries, have created a multitude of humanitarian crisis sites. The ...