Direct digital predistortion technique for the compensation of laser chirp and fiber dispersion in long haul radio over fiber links

Muhammad Usman Hadi, Jacopo Nanni, Jean Luc Polleux, Pier Andrea Traverso, Giovanni Tartarini

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Analog Radio-over-Fiber (A-RoF) communication technology constitutes a promising technique for next generation radio access networks thanks to its relatively low bandwidth requirements. Within this context, an efficient predistortion technique is proposed, which can be applied to reduce the impairments of A-RoF systems due to the combined effects of frequency chirp of the laser source and chromatic dispersion of the optical channel. The radio frequency signal is firstly put in digital form through an analog to digital converter, then the predistortion operation is realized, and finally the resulting signal is put again into analog form. A comprehensive analysis on the theoretical basis of the proposed approach is presented, together with the approximations introduced, which makes it practically realizable. The improvements on the quality of the received signal due to the proposed solution are illustrated with reference to scenarios of applicative interest. The performance of proposed technique is evaluated in terms of adjacent channel leakage ratio and error vector magnitude when long term evolution signal is applied at the input.

Original languageEnglish
Article number205
JournalOptical and Quantum Electronics
Volume51
Issue number6
Early online date13 Jun 2019
DOIs
Publication statusE-pub ahead of print - 13 Jun 2019

Keywords

  • Adjacent channel leakage ratio
  • Directly modulated laser
  • Error vector magnitude
  • LTE signals
  • Predistortion
  • Radio-over-Fiber

Fingerprint

Dive into the research topics of 'Direct digital predistortion technique for the compensation of laser chirp and fiber dispersion in long haul radio over fiber links'. Together they form a unique fingerprint.

Cite this