Practically feasible closed-loop digital predistortion for VCSEL-MMF-based radio-over-fiber links

Muhammad Usman Hadi, Jacopo Nanni, Olivier Venard, Geneviève Baudoin, Jean Luc Polleux, Giovanni Tartarini

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)37-43
Number of pages7
Issue number1
Publication statusPublished (in print/issue) - 1 Apr 2020

Bibliographical note

Publisher Copyright:
© 2020 Czech Technical University.


  • Adjacent channel power ratio (ACPR)
  • Digital predistortion (DPD)
  • Indirect learning architecture (ILA)
  • Long term evolution (LTE)
  • Radio over fiber (RoF)
  • Vertical cavity surface emitting lasers (VCSEL)


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