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Proceedings Paper

Close-form expression of one-tap normalized LMS carrier phase recovery in optical communication systems
Author(s): Tianhua Xu; Gunnar Jacobsen; Sergei Popov; Jie Li; Tiegen Liu; Yimo Zhang
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Paper Abstract

The performance of long-haul high speed coherent optical fiber communication systems is significantly degraded by the laser phase noise and the equalization enhanced phase noise (EEPN). In this paper, the analysis of the one-tap normalized least-mean-square (LMS) carrier phase recovery (CPR) is carried out and the close-form expression is investigated for quadrature phase shift keying (QPSK) coherent optical fiber communication systems, in compensating both laser phase noise and equalization enhanced phase noise. Numerical simulations have also been implemented to verify the theoretical analysis. It is found that the one-tap normalized least-mean-square algorithm gives the same analytical expression for predicting CPR bit-error-rate (BER) floors as the traditional differential carrier phase recovery, when both the laser phase noise and the equalization enhanced phase noise are taken into account.

Paper Details

Date Published: 7 October 2016
PDF: 5 pages
Proc. SPIE 9902, Fourth International Conference on Wireless and Optical Communications, 990203 (7 October 2016); doi: 10.1117/12.2261932
Show Author Affiliations
Tianhua Xu, Univ. College London (United Kingdom)
Royal Institute of Technology (Sweden)
Acreo Swedish ICT AB (Sweden)
Gunnar Jacobsen, Royal Institute of Technology (Sweden)
Acreo Swedish ICT AB (Sweden)
Sergei Popov, Royal Institute of Technology (Sweden)
Jie Li, Acreo Swedish ICT AB (Sweden)
Tiegen Liu, Tianjin Univ. (China)
Yimo Zhang, Tianjin Univ. (China)


Published in SPIE Proceedings Vol. 9902:
Fourth International Conference on Wireless and Optical Communications
Maode Ma, Editor(s)

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