2022-02-112022-02-112019-09Becerra-González, J.A., Madero-Ayora, M.J. y Crespo-Cadenas, C. (2019). Comparative Analysis of Greedy Pursuits for the Order Reduction of Wideband Digital Predistorters. IEEE Transactions on Microwave Theory and Techniques, 67 (9), 3575-3585.1557-96700018-9480https://hdl.handle.net/11441/129890This paper provides a review of greedy pursuits for optimizing Volterra-based behavioral models structure and estimating its parameters. An experimental comparison of the digital predistortion (DPD) linearization performance achieved by these approaches for model-order reduction, such as compressive sampling matching pursuit (CoSaMP), subspace pursuit (SP), orthogonal matching pursuit (OMP), and the novel doubly OMP (DOMP), is presented. A benchmark of the techniques in the DPD of a commercial class AB power amplifier (PA) and a class J PA operating over a 15-MHz Long-Term Evolution (LTE) signal is presented, giving a clear overview of their pruning characteristics in terms of linearization indicators and regressor selection capabilities. In addition, the benchmark is run in a cross-validation scheme by identifying the DPD with a 30-MHz 5G-new radio (NR) signal and validating with the same signal and a 20-MHz multicarrier wideband code division multiple access (WCDMA) signal. The DOMP is shown to be a promising technique since it achieves an enhanced model-order reduction for a similar linearization performance and precision.application/pdf11 p.engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Adaptive algorithmsGreedy algorithmsModelingNonlinear systemsPower amplifiers (PAs)PredistortionVolterra seriesinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess10.1109/TMTT.2019.2928290