Practically Feasible Closed-Loop Digital Predistortion for VCSEL-MMF-Based Radio-over-Fiber links

M. U. Hadi, J. Nanni, O. Venard, G. Baudoin, J. L. Polleux, G. Tartarini

Practically Feasible Closed-Loop Digital Predistortion for VCSEL-MMF-Based Radio-over-Fiber links

Číslo: 1/2020
Periodikum: Radioengineering Journal
DOI: 10.13164/re.2020.0037

Klíčová slova: Radio over Fiber (RoF), Digital Predistortion (DPD), Indirect Learning Architecture (ILA), Adjacent Channel Power Ratio (ACPR), Vertical Cavity Surface Emitting Lasers (VCSEL), Long Term Evolution (LTE)

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Anotace: The article demonstrates a novel Digital Predistortion (DPD) architecture for Mobile Front Haul links for the advanced Long-Term Evolution (LTE) and upcoming 5G networks. Precisely, the use of a feedback approximation method has been proposed and experimentally demonstrated herein that simplifies the complexities in realizing the practical DPD technique for Multi-Mode VCSELs and Multi-Mode Fibers based Radio over Fiber systems. As a figure of merit, linearization efficiency is provided in terms of Adjacent Channel Power Ratio, Normalized Mean Square Error and Error Vector Magnitude referring to a complete LTE frame occupying 10 MHz with 256-QAM modulation format.