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Digital predistorters go multidimensional: DPD for concurrent multiband envelope tracking and outphasing power amplifiers

Abstract: Over 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 other linearization techniques, such as Cartesian feedback or feedforward, DPD has proven able to adapt to the always-growing demands of technology: wider bandwidths, stringent spectrum masks, and reconfigurability. The principles of predistortion linearization (in its analog or digital forms) are straightforward, and the linearization subsystem precedes the PA (a nonlinear function in a digital signal processor in the case of DPD or nonlinear device in the case of analog predistortion and counteracts the nonlinear characteristic of the PA. Some excellent overviews on DPD can be found in [1]-[4]. Let us now look at the challenges that DPD linearization has faced and will continue to face in the near future with 5G new radio (5G-NR).

 Autoría: Gilabert P., Montoro G., Vegas D., Ruiz N., Garcia J.,

 Fuente: IEEE Microwave Magazine, 2019, 20(5), 50-61

Editorial: Institute of Electrical and Electronics Engineers Inc.

 Fecha de publicación: 01/05/2019

Nº de páginas: 12

Tipo de publicación: Artículo de Revista

DOI: 10.1109/MMM.2019.2898021

ISSN: 1527-3342,1557-9581

Proyecto español: TEC2017-83343-C4-1-R ; TEC2017-83343-C4-2-R

Url de la publicación: https://doi.org/10.1109/MMM.2019.2898021

Autores/as

PERE LLUIS GILABERT PINAL

GABRIEL MONTORO LOPEZ

DAVID VEGAS BAYER

MARIA DE LAS NIEVES RUIZ LAVIN