Now showing items 1-20 of 27

    • 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)
      Conference lecture
      Restricted access - publisher's policy
      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 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)
      Conference report
      Restricted access - publisher's policy
      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 real-time FPGA-based implementation of a high-performance MIMO-OFDM mobile WiMAX transmitter 

      Font Bach, Oriol; Bartzoudis, Nikolaos; Pascual Iserte, Antonio; López Bueno, David (2011)
      Conference report
      Open Access
      The Multiple Input Multiple Output (MIMO)-Orthogonal Frequency Division Multiplexing (OFDM) is considered a key technology in modern wireless-access communication systems. The IEEE 802.16e standard, also denoted as ...
    • A real-time FPGA-based implementation of a high-performance MIMO-OFDM transceiver featuring a closed-loop communication scheme 

      Font Bach, Oriol; Bartzoudis, Nikolaos; Pascual Iserte, Antonio; López Bueno, David (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Conference report
      Restricted access - publisher's policy
      In this paper we present the FPGA implementation of a multi-antenna Orthogonal Frequency-Division Multiplexing (OFDM) transmitter and receiver featuring a closed-loop (CL) communication scheme. The PHY-layer development ...
    • A real-time FPGA-based mobile WiMAX transceiver supporting multi-antenna configurations 

      Bartzoudis, Nikolaos; Font Bach, Oriol; Pascual Iserte, Antonio; López Bueno, David (IEEE, 2011)
      Conference report
      Restricted access - publisher's policy
      This paper presents the design, implementation and experimental validation of a real-time FPGA-based mobile WiMAX baseband transceiver. Three different antenna configuration schemes were implemented and tested, namely ...
    • A real-time MIMO-OFDM mobile WiMAX receiver: architecture, design and FPGA implementation 

      Font Bach, Oriol; Bartzoudis, Nikolaos; Pascual Iserte, Antonio; López Bueno, David (2011-11)
      Article
      Restricted access - publisher's policy
      The IEEE 802.16e-2005 standard, also denoted as mobile WiMAX, was introduced as one of the first real efforts towards the deployment of fourth generation communication systems providing fixed and mobile broadband wireless ...
    • 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)
      Conference report
      Restricted access - publisher's policy
      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) ...
    • Amping up, saving power 

      López Bueno, David; Wang, Teng; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel (2016-01-01)
      Article
      Open Access
      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 ...
    • Design, implementation and testing of a real-time mobile WiMAX testbed featuring MIMO technology 

      Font Bach, Oriol; Bartzoudis, Nikolaos; Pascual Iserte, Antonio; López Bueno, David (2010-05)
      Conference lecture
      Open Access
    • Dynamic selection and estimation of the digital predistorter parameters for power amplifier linearization 

      Pham, Thi Quynh Anh; Montoro López, Gabriel; López Bueno, David; Gilabert Pinal, Pere Lluís (IEEE Microwave Theory and Techniques Society, 2019-07-03)
      Article
      Open Access
      This paper presents a new technique that dynamically estimates and updates the coefficients of a digital predistorter (DPD) for power amplifier (PA) linearization. The proposed technique is dynamic in the sense of estimating, ...
    • 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 ...
    • Gedomis: un testbed multi-antenna en temps real 

      Font Bach, Oriol; López Bueno, David; Bartzoudis, Nikolaos; Pascual Iserte, Antonio; Pérez Neira, Ana Isabel (2008-06)
      Article
      Restricted access - publisher's policy
      Els sistemes multi-antena són una solució tecnològica viable cada cop més present als estàndards de sistemes ràdio actuals. Aquí presentem el demostrador Gedomis en procés de desenvolupament per provar la viabilitat ...
    • Independent digital predistortion parameters estimation using adaptive principal component analysis 

      López Bueno, David; Pham, Thi Quynh Anh; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (IEEE Microwave Theory and Techniques Society, 2018-01-01)
      Article
      Open Access
      This paper presents an estimation/adaptation method based on the adaptive principal component analysis (APCA) technique to guarantee the identification of the minimum necessary parameters of a digital predistorter. The ...
    • Interference management in LTE-based HetNets: a practical approach 

      Font Bach, Oriol; Bartzoudis, Nikolaos; Pascual Iserte, Antonio; Payaró Llisterri, Miquel; Blanco, Luis; López Bueno, David; Molina Pena, Marc (Wiley-Blackwell, 2015)
      Article
      Open Access
      Interference is a major obstacle in radio communications, especially when opportunistic frequency reuse is an inherent requirement for maximising spectral ef¿ciency in heterogeneous networks. A typical example is encountered ...
    • Linealización digital de transmisores mediante redes neuronales no lineales 

      López Bueno, David; Pham, Thi Quynh Anh; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (2019)
      Conference report
      Restricted access - publisher's policy
      This paper presents an overview on how the artificial neural networks (ANN) are applied to digitally linearize modern transmitters. The use of nonlinear ANNs is intended to either assist or replace the traditional crest ...
    • MATLAB as a design and verification tool for the hardware prototyping of wireless communication systems 

      Font Bach, Oriol; Pascual Iserte, Antonio; Bartzoudis, Nikolaos; López Bueno, David (InTech, 2012-09)
      Part of book or chapter of book
      Open Access
    • Multi-dimensional LUT-based digital predistorter for concurrent dual-band envelope tracking power amplifier linearization 

      Pham, Thi Quynh Anh; López Bueno, David; Wang, Teng; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference lecture
      Open Access
      This paper presents a multi lookup table (LUT) implementation scheme for the 3D distributed memory polynomial (3D-DMP) behavioral model used in Digital Predistortion (DPD) linearization for concurrent dual-band envelope ...
    • Order reduction of wideband digital predistorters using principal component analysis 

      Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; López Bueno, David; Bartzoudis, Nikolaos; Bertran Albertí, Eduardo; Payaró Llisterri, Miquel; Hourtane, Alain (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference lecture
      Restricted access - publisher's policy
      This paper presents how to apply order reduction in wide-band digital predistortion (DPD) linearizers using the principal component analysis (PCA) technique. This method is tested in a wireless backhauling transmitter ...
    • Partial least squares identification of multi look-up table digital predistorters for concurrent dual-band envelope tracking power amplifiers 

      Pham, Thi Quynh Anh; López Bueno, David; Wang, Teng; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís (IEEE Microwave Theory and Techniques Society, 2018-08-02)
      Article
      Open Access
      This paper presents a technique to estimate the coefficients of a multiple-look-up table (LUT) digital predistortion (DPD) architecture based on the partial least-squares (PLS) regression method. The proposed 3-D distributed ...
    • Peak cancellation and digital predistortion of high-order QAM wideband signals for next generation wireless backhaul equipment 

      López Bueno, David; Gilabert Pinal, Pere Lluís; Montoro López, Gabriel; Bartzoudis, Nikolaos (2014)
      Conference report
      Restricted access - publisher's policy
      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, and ...