Fast channel estimation and equalization scheme for offset-QAM OFDM systems

Simple item page
dc.contributor.authorZhao, Jian
dc.contributor.authorTownsend, Paul D.
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2019-02-18T12:05:56Z
dc.date.available2019-02-18T12:05:56Z
dc.date.issued2019
dc.description.abstractWe show that the orthogonality between signal and intrinsic imaginary interference (IMI) in offset quadrature amplitude modulation (offset-QAM) orthogonal frequency division multiplexing (OFDM) can still be maintained under a certain condition even when the timing slots of different subcarriers are misaligned. We show that the phase and velocity differences over subcarriers induced by fiber dispersion satisfy this condition. Based on this, we propose a fast channel estimation and equalization scheme without prior channel information including coarse dispersion. We investigate the proposed scheme in a 40-Gbit/s offset-16QAM OFDM experiment and 240-Gbit/s polarization-division-multiplexed offset-16QAM OFDM simulations, both over 1200-km single-mode fiber. It is shown that the proposed scheme gives better performance, reduced overhead for the training sequence, and/or lower complexity than other schemes. We also compare offset-QAM OFDM with the proposed scheme and conventional OFDM, and show that in addition to the elimination of cyclic prefix overhead, offset-QAM OFDM gives better performance and longer transmission reach for a moderate/small number of subcarriers.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid342646
dc.identifier.citationZhao, J. and Townsend, P. (2019) 'Fast channel estimation and equalization scheme for offset-QAM OFDM systems', Optics Express, 27(2), 15 pp. DOI: 10.1364/OE.27.000714en
dc.identifier.doi10.1364/OE.27.000714
dc.identifier.endpage15en
dc.identifier.issn1094-4087
dc.identifier.issued2en
dc.identifier.journaltitleOptics Expressen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/7511
dc.identifier.volume27en
dc.language.isoenen
dc.publisherOSA - The Optical Societyen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Investigator Programme/12/IA/1270/IE/Next Generation Photonic Access and Data Communication Systems/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2276/IE/I-PIC Irish Photonic Integration Research Centre/en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Career Development Award/15/CDA/3652/IE/Technologies towards Flexible High-Capacity Optical Networks/en
dc.relation.urihttp://www.opticsexpress.org/abstract.cfm?URI=oe-27-2-714
dc.rights© 2019, Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.en
dc.rights.urihttps://www.osapublishing.org/library/license_v1.cfm#VOR-OAen
dc.subjectAmplified spontaneous emissionen
dc.subjectOptical networksen
dc.subjectOptical signalsen
dc.subjectPhase recoveryen
dc.subjectPolarization mode dispersionen
dc.subjectQuadrature amplitude modulationen
dc.titleFast channel estimation and equalization scheme for offset-QAM OFDM systemsen
dc.typeArticle (peer-reviewed)en
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
oe-27-2-714.pdf
Size:
4.77 MB
Format:
Adobe Portable Document Format
Description:
Published Version
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Tyndall National Institute - Journal Articles