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Variable-step-size LMS adaptive filter for digital chromatic dispersion compensation in PDM-QPSK coherent transmission system
KTH, School of Information and Communication Technology (ICT), Optics and Photonics (Closed 20120101), Optics (Closed 20120101).
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
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2009 (English)In: 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, SPIE - International Society for Optical Engineering, 2009, 75062I- p.Conference paper, Published paper (Refereed)
Abstract [en]

High bit rates optical communication systems pose the challenge of their tolerance to linear and nonlinear fiber impairments. Digital filters in coherent optical receivers can be used to mitigate the chromatic dispersion entirely in the optical transmission system. In this paper, the least mean square adaptive filter has been developed for chromatic equalization in a 112-Gbit/s polarization division multiplexed quadrature phase shift keying coherent optical transmission system established on the VPIphotonics simulation platform. It is found that the chromatic dispersion equalization shows a better performance when a smaller step size is used. However, the smaller step size in least mean square filter will lead to a slower iterative operation to achieve the guaranteed convergence. In order to solve this contradiction, an adaptive filter employing variable-step-size least mean square algorithm is proposed to compensate the chromatic dispersion in the 112-Gbit/s coherent communication system. The variable-step-size least mean square filter could make a compromise and optimization between the chromatic dispersion equalization performance and the algorithm converging speed. Meanwhile, the required tap number and the converged tap weights distribution of the variable-step-size least mean square filter for a certain fiber chromatic dispersion are analyzed and discussed in the investigation of the filter feature.

Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2009. 75062I- p.
Series
Proceedings of SPIE - The International Society for Optical Engineering, ISSN 0277-786X ; 7506
Keyword [en]
Chromatic dispersion (CD), Coherent optical receivers, Least mean square (LMS) adaptive filter, Polarization division multiplexed quadrature phase shift keying (PDM-QPSK), Variable-step-size least mean square (VLMS) adaptive filter
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-152776DOI: 10.1117/12.837834Scopus ID: 2-s2.0-74049161903ISBN: 978-081947892-4 (print)OAI: oai:DiVA.org:kth-152776DiVA: diva2:755620
Conference
2009 International Conference on Optical Instruments and Technology, OIT 2009, 19 October 2009 through 22 October 2009, Shanghai, China
Note

QC 20141015

Available from: 2014-10-15 Created: 2014-10-01 Last updated: 2014-10-15Bibliographically approved

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Xu, TianhuaPopov, SergeiWang, KeFriberg, Ari T.
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CiteExportLink to record
Permanent link

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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf