Non-convex optimization in digital pre-distortion of the signal
Abstract
In this paper, we give some observation of applying modern optimization methods for functionals describing digital predistortion (DPD) of signals with orthogonal frequency division multiplexing (OFDM) modulation. The considered family of model functionals is determined by the class of cascade Wiener--Hammerstein models, which can be represented as a computational graph consisting of various nonlinear blocks. To assess optimization methods with the best convergence depth and rate as a properties of this models family we multilaterally consider modern techniques used in optimizing neural networks and numerous numerical methods used to optimize non-convex multimodal functions. The research emphasizes the most effective of the considered techniques and describes several useful observations about the model properties and optimization methods behavior.
Keywords
Cite
@article{arxiv.2103.10552,
title = {Non-convex optimization in digital pre-distortion of the signal},
author = {Dmitry Pasechnyuk and Alexander Maslovskiy and Alexander Gasnikov and Anton Anikin and Alexander Rogozin and Alexander Gornov and Andrey Vorobyev and Eugeniy Yanitskiy and Lev Antonov and Roman Vlasov and Anna Nikolaeva and Maria Begicheva},
journal= {arXiv preprint arXiv:2103.10552},
year = {2021}
}