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Variable-step-size LMS adaptive filter for digital chromatic dispersion compensation in PDM-QPSK coherent transmission system
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Xu, Tianhua, Jacobsen, Gunnar, Popov, Sergei, Li, Jie, Wang, Ke and Friberg, Ari T. (2009) Variable-step-size LMS adaptive filter for digital chromatic dispersion compensation in PDM-QPSK coherent transmission system. In: International Conference on Optical Instrumentation and Technology, Shanghai, China. Published in: Proceedings of SPIE - International Society for Optical Engineering, 7506 75062I. doi:10.1117/12.837834 ISSN 0277-786X.
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Official URL: http://dx.doi.org/10.1117/12.837834
Abstract
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.
Item Type: | Conference Item (Paper) | ||||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
Library of Congress Subject Headings (LCSH): | Optical fiber communication, Bit error rate, Phase shift keying, Least squares | ||||||
Journal or Publication Title: | Proceedings of SPIE - International Society for Optical Engineering | ||||||
Publisher: | S P I E - International Society for Optical Engineering | ||||||
ISSN: | 0277-786X | ||||||
Book Title: | 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments | ||||||
Official Date: | 1 December 2009 | ||||||
Dates: |
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Volume: | 7506 | ||||||
Page Range: | 75062I | ||||||
DOI: | 10.1117/12.837834 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||
Date of first compliant deposit: | 15 November 2017 | ||||||
Date of first compliant Open Access: | 15 November 2017 | ||||||
Conference Paper Type: | Paper | ||||||
Title of Event: | International Conference on Optical Instrumentation and Technology | ||||||
Type of Event: | Conference | ||||||
Location of Event: | Shanghai, China |
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