Experimental demonstration of the compensation of nonlinear propagation in a LTE RoF system with a directly modulated laser

T. Kanesan, W. P. Ng, Z. Ghassemlooy, Chao Lu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)

Abstract

This paper reveals that nonlinear propagation is a critical problem for the long term evolution (LTE) technology based on the radio-over-fibre (RoF) system. Therefore, a direct modulation based frequency dithering (DMFD) method is proposed for nonlinear propagation compensation, namely the self phase modulation (SPM) and stimulated brillouin scattering (SBS). We found that DMFD method operates substantially different in RoF systems. The major difference is that DMFD signal frequency fd has to be much smaller than the RoF carrier frequency fRF; thus the condition of {fd << fRF} has to be stringently obeyed. Analysis of the optical launch power (OLP) with DMFD method reveals that the SBS threshold is above ∼6 dBm for LTE-RoF system. In addition, we also unfold that DMFD method does not induce an additional distortion for the linear and optimum OLP regions, which are frequency chirp dependent. Hence the proposed method improves the LTE-RoF system without any shortcoming. Finally, at OLP values of 8 dBm and 10 dBm, LTE-RoF system exhibits an average error vector magnitude (EVM) improvement of ∼4.32% and ∼6.18%, respectively, for the 50 km transmission span.

Original languageEnglish
Title of host publication2013 IEEE International Conference on Communications, ICC 2013
EditorsDong-In Kim
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3884-3888
Number of pages5
ISBN (Electronic)9781467331203
ISBN (Print)9781467331227
DOIs
Publication statusPublished - 11 Nov 2013
Event2013 IEEE International Conference on Communications, ICC 2013 - Budapest, Hungary
Duration: 9 Jun 201313 Jun 2013

Publication series

NameIEEE International Conference on Communications
ISSN (Print)1550-3607

Conference

Conference2013 IEEE International Conference on Communications, ICC 2013
CountryHungary
CityBudapest
Period9/06/1313/06/13

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