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Linearly interpolated sub-symbol optical phase noise suppression in CO-OFDM system
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering. South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, Guangdong, China .ORCID iD: 0000-0002-3401-1125
2015 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 23, no 4, 4691-4702 p.Article in journal (Refereed) Published
Abstract [en]

An optical phase noise suppression algorithm, LI-SCPEC, based on phase linear interpolation and sub-symbol processing is proposed for CO-OFDM system. By increasing the temporal resolution of carrier phase tracking through dividing one symbol into several sub-blocks, i.e., sub-symbols, inter-carrier-interference (ICI) mitigation is achieved in the proposed algorithm. Linear interpolation is employed to obtain a reliable temporal reference for sub-symbol phase estimation. The new algorithm, with only a few number of sub-symbols (N-B = 4), can provide a considerably larger laser linewidth tolerance than several other ICI mitigation algorithms as demonstrated by Monte-Carlo simulations. Numerical analysis verifies that the best performance is achieved with an optimal and moderate number of sub-symbols. Complexity analysis shows that the required number of complex-valued multiplications is independent of the number of sub-symbols used in the proposed algorithm. (C) 2015 Optical Society of America

Place, publisher, year, edition, pages
2015. Vol. 23, no 4, 4691-4702 p.
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URN: urn:nbn:se:kth:diva-164476DOI: 10.1364/OE.23.004691ISI: 000350872700083PubMedID: 25836506Scopus ID: 2-s2.0-84924125203OAI: oai:DiVA.org:kth-164476DiVA: diva2:806715
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QC 20150421

Available from: 2015-04-21 Created: 2015-04-17 Last updated: 2017-12-04Bibliographically approved

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He, Sailing

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