Please use this identifier to cite or link to this item: https://doi.org/10.1109/LPT.2012.2232288
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dc.titleAccurate two-stage frequency offset estimation for coherent optical systems
dc.contributor.authorHuang, D.
dc.contributor.authorCheng, T.-H.
dc.contributor.authorYu, C.
dc.date.accessioned2014-06-17T02:36:26Z
dc.date.available2014-06-17T02:36:26Z
dc.date.issued2013
dc.identifier.citationHuang, D., Cheng, T.-H., Yu, C. (2013). Accurate two-stage frequency offset estimation for coherent optical systems. IEEE Photonics Technology Letters 25 (2) : 179-182. ScholarBank@NUS Repository. https://doi.org/10.1109/LPT.2012.2232288
dc.identifier.issn10411135
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/54867
dc.description.abstractWe present a two-stage feedforward frequency offset estimation (FOE) algorithm on the basis of the phase-difference method. The first stage of the proposed FOE generates a rough FOE through averaging the phase difference between two adjacent symbols and compensates the signals. The second stage of the FOE estimates the residual FO through averaging the phase difference of two symbols with distance L , which provides a significantly larger noise-tolerance and thus improves system performance. The proposed FOE can be applied to both quadrature phase-shift keying and 16-quadrature amplitude modulation systems. Simulations show that the mean square error of the proposed FOE can be reduced through an order of two in magnitude under small laser linewidth situation compared with the classic phase-difference-based FOE. The experimental result shows that the proposed FOE gives 0.6-dB optical-signal-to-noise-ratio improvement against the classic FOE, which validates its usefulness. © 1989-2012 IEEE.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1109/LPT.2012.2232288
dc.sourceScopus
dc.subjectCoherent optical communication
dc.subjectdigital signal processing
dc.subjectfrequency offset estimation
dc.typeArticle
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1109/LPT.2012.2232288
dc.description.sourcetitleIEEE Photonics Technology Letters
dc.description.volume25
dc.description.issue2
dc.description.page179-182
dc.description.codenIPTLE
dc.identifier.isiut000313884100020
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