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UAV generalized longitudinal model for autopilot controller designs
(2021-11-16)
Article
Open AccessThis paper aims to overcome the main obstacle to compare the merits of the different control strategies for fixed-wing unmanned aerial vehicles (UAVs) to assess autopilot performances. Up to now, the published studies of ... -
Comparison of feature selection techniques for power amplifier behavioral modeling and digital predistortion linearization
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-08-27)
Article
Open AccessThe power amplifier (PA) is the most critical subsystem in terms of linearity and power efficiency. Digital predistortion (DPD) is commonly used to mitigate nonlinearities while the PA operates at levels close to saturation, ... -
Beyond the Moore-Penrose inverse: Strategies for the estimation of digital predistortion linearization parameters
(2020-12)
Article
Open AccessDigital 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. ... -
Tone injection-based cancellation technique for nonlinear distortion reduction of modulated signals in BAW resonators
(2020-01-01)
Article
Open AccessA technique for the reduction of third-order intermodulation distortion (IMD3) occurring in bulk acoustic wave (BAW) filters and multiplexers is presented. The method consists of using the intrinsic second-order intermodulation ... -
The Input-output equivalent sources method for fast simulations of distributed nonlinearities in bulk acoustic wave resonators and filters
(Institute of Electrical and Electronics Engineers (IEEE), 2020)
Article
Open AccessThis work presents a new method to analyze weak distributed nonlinear effects, with focus on the generation of harmonics (H) and intermodulation products (IMD) in bulk acoustic wave resonators and filters composed of them. ... -
Third-Harmonic and intermodulation distortion in bulk acoustic-wave resonators
(IEEE Microwave Theory and Techniques Society, 2019-12-17)
Article
Open AccessThis article discusses on the measured third-order intermodulation (IMD3) products and third harmonics (H3) appearing in a set of six different solidly mounted resonators (SMR) and bulk acoustic-wave (BAW) resonators with ... -
Dynamic selection and estimation of the digital predistorter parameters for power amplifier linearization
(IEEE Microwave Theory and Techniques Society, 2019-07-03)
Article
Open AccessThis 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, ... -
Tecnologies emergents aplicades al sector agroalimentari
(2020-01)
Article
Open AccessAlguns dels objectius de desenvolupament sostenible que proposa l’Agenda 2030 són: posar fi a la fam, assolir la seguretat alimentària i la millora de la nutrició i promoure l’agricultura sostenible. Assumir aquests reptes ... -
Spectral weighting orthogonal matching pursuit algorithm for enhanced out-of-band digital predistortion linearization
(2018-01-01)
Article
Open AccessThis 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 ... -
Digital predistorters go multidimensional: DPD for concurrent multiband envelope tracking and outphasing power amplifiers
(2019-05-01)
Article
Open AccessOver 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 ... -
Sub-nanosecond tuning of microwave resonators fabricated on ruddlesden–popper dielectric thin films
(Wiley, 2018-08-01)
Article
Open AccessVoltage-tunable dielectric materials are widely used for microwave-frequency signal processing. Among tunable dielectric thin films, (SrTiO3)nSrO Ruddlesden–Popper (RP) superlattices have exceptionally low loss at high ... -
Independent digital predistortion parameters estimation using adaptive principal component analysis
(IEEE Microwave Theory and Techniques Society, 2018-01-01)
Article
Open AccessThis 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 ...
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