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Carrier phase estimation methods in coherent transmission systems influenced by equalization enhanced phase noise
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Xu, Tianhua, Jacobsen, Gunnar, Popov, Sergei, Li, Jie, Friberg, Ari T. and Zhang, Yimo (2013) Carrier phase estimation methods in coherent transmission systems influenced by equalization enhanced phase noise. Optics Communications, 293 . pp. 54-60. doi:10.1016/j.optcom.2012.11.090 ISSN 0030-4018.
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Official URL: http://dx.doi.org/10.1016/j.optcom.2012.11.090
Abstract
We present a comparative study on three carrier phase estimation algorithms, including a one-tap normalized least mean square (NLMS) method, a block-average method, and a Viterbi–Viterbi method in the n-level phase shift keying coherent transmission systems considering the equalization enhanced phase noise (EEPN). In these carrier phase estimation methods, the theoretical bit-error-rate floors based on traditional leading-order Taylor expansion are compared to the practical simulation results, and the tolerable total effective linewidths (involving the transmitter, the local oscillator lasers and the EEPN) for a fixed bit-error-rate floor are evaluated with different block sizes, when the fiber nonlinearities are neglected. The complexity of the three carrier phase estimation methods is also discussed. We find that the carrier phase estimation methods in practical systems should be analyzed based on the simulation results rather than the traditional theoretical predictions, when large EEPN is involved. The one-tap NLMS method can always show an acceptable behavior, while the step size is complicated to optimize. The block-average method is efficient to implement, but it behaves unsatisfactorily when using a large block size. The Viterbi–Viterbi method can show a small improvement compared to the block-average method, while it requires more computational complexity.
Item Type: | Journal Article | ||||
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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, Least squares, Phase shift keying, Bit error rate | ||||
Journal or Publication Title: | Optics Communications | ||||
Publisher: | Elsevier BV * North Holland | ||||
ISSN: | 0030-4018 | ||||
Official Date: | 2013 | ||||
Dates: |
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Volume: | 293 | ||||
Page Range: | pp. 54-60 | ||||
DOI: | 10.1016/j.optcom.2012.11.090 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 17 November 2017 | ||||
Date of first compliant Open Access: | 17 November 2017 |
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