Robust channel estimation for coherent optical orthogonal chirp-division multiplexing with pulse compression and noise rejection

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dc.contributor.authorOuyang, Xing
dc.contributor.authorAntony, Cleitus
dc.contributor.authorTalli, Giuseppe
dc.contributor.authorTownsend, Paul D.
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2018-12-20T15:31:45Z
dc.date.available2018-12-20T15:31:45Z
dc.date.issued2018-10-22
dc.date.updated2018-12-20T15:28:25Z
dc.description.abstractOrthogonal chirp-division multiplexing (OCDM) was recently proposed as a promising modulation technique for high-speed fiber-optic communications due to its resilience to transmission impairments. By exploiting the pulse-compression property of the chirped waveforms, in this paper we propose a channel estimation algorithm compatible with the coherent optical (CO) OCDM system. In the proposed algorithm, a chirp from the orthogonal basis of the Fresnel transform is employed as the pilot signal. At the receiver, noise-rejection windowing is adopted in the Fresnel domain to remove the excessive noise after pulse compression, and then dispersions can be effectively compensated by efficient single-tap equalizers. It is shown that the proposed estimator is unbiased as long as the width of the noise-rejection window is wider than the maximum excess delay of the system. Moreover, the optimal window function achieving the minimum mean square error is derived in closed form. With these desired properties, it is shown that the proposed estimator outperforms conventional estimators, such as the intrasymbol frequency-domain average estimator, especially when the dispersion is severe. Finally, numerical results are provided to confirm the advantages of the CO-OCDM system with the proposed channel estimation algorithm.en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationOuyang, X., Antony, C., Talli, G. and Townsend, P. D. (2018) 'Robust Channel Estimation for Coherent Optical Orthogonal Chirp-Division Multiplexing With Pulse Compression and Noise Rejection', Journal of Lightwave Technology, 36(23), pp. 5600-5610. doi: 10.1109/JLT.2018.2877305en
dc.identifier.doi10.1109/JLT.2018.2877305
dc.identifier.endpage5610en
dc.identifier.issn0733-8724
dc.identifier.issued23en
dc.identifier.journaltitleJournal of Lightwave Technologyen
dc.identifier.startpage5600en
dc.identifier.urihttps://hdl.handle.net/10468/7249
dc.identifier.volume36en
dc.language.isoenen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
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.urihttps://ieeexplore.ieee.org/abstract/document/8501550
dc.rights© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.en
dc.subjectChannel estimationen
dc.subjectChirp modulationen
dc.subjectEqualisersen
dc.subjectFrequency-domain analysisen
dc.subjectLeast mean squares methodsen
dc.subjectOptical fibre communicationen
dc.subjectOptical fibre dispersionen
dc.subjectOptical modulationen
dc.subjectMaximum excess delayen
dc.subjectOptimal window functionen
dc.subjectIntrasymbol frequency-domain average estimatoren
dc.subjectCO-OCDM systemen
dc.subjectChannel estimation algorithmen
dc.subjectRobust channel estimationen
dc.subjectCoherent optical orthogonal chirp-division multiplexingen
dc.subjectPulse compressionen
dc.subjectNoise rejectionen
dc.subjectHigh-speed fiber-optic communicationsen
dc.subjectTransmission impairmentsen
dc.subjectPulse-compression propertyen
dc.subjectChirped waveformsen
dc.subjectCoherent optical OCDM systemen
dc.subjectOrthogonal basisen
dc.subjectFresnel transformen
dc.subjectNoise-rejection windowingen
dc.subjectFresnel domainen
dc.subjectNoise-rejection windowen
dc.subjectModulation techniqueen
dc.subjectChirpen
dc.subjectDiscrete Fourier transformsen
dc.subjectCode division multiplexingen
dc.subjectReceiversen
dc.subjectIntra-symbol frequency-domain average (ISFA)en
dc.subjectOptical coherent detectionen
dc.subjectOrthogonal chirp-division multiplexing (OCDM)en
dc.subjectOrthogonal frequency-division multiplexing (OFDM)en
dc.titleRobust channel estimation for coherent optical orthogonal chirp-division multiplexing with pulse compression and noise rejectionen
dc.typeArticle (peer-reviewed)en
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