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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 10, Iss. 12 — Dec. 1, 2012
  • pp: 120601–120601

Quadrature imbalance compensation algorithm based on statistical properties of signals in CO-QPSK system

Yaojun Qiao, Yanfei Xu, Lujiao Li, and Yuefeng Ji  »View Author Affiliations


Chinese Optics Letters, Vol. 10, Issue 12, pp. 120601-120601 (2012)


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Abstract

We propose a blind quadrature imbalance (QI) compensation algorithm based on the statistical properties of I and Q signals in a receiver. The algorithm estimates the QI parameters of a receiver by calculating the mean, variance, and correlation coefficient of I and Q components. Then, the estimated imbalance parameters are adopted to compensate for the QI in the receiver. Simulation results show that the Q factor is considerably optimized by the application of the QI compensation algorithm in an 80-Gb/s Pol-Mux coherent optical quadrature phase-shift keying (CO-QPSK) system. Compared with conventional algorithms, the proposed algorithm exhibits better performance when the phase deviation from QI exceeds ±15°.

© 2012 Chinese Optics Letters

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications
(070.6020) Fourier optics and signal processing : Continuous optical signal processing

ToC Category:
Fiber Optics and Optical Communications

Citation
Yaojun Qiao, Yanfei Xu, Lujiao Li, and Yuefeng Ji, "Quadrature imbalance compensation algorithm based on statistical properties of signals in CO-QPSK system," Chin. Opt. Lett. 10, 120601-120601 (2012)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-10-12-120601

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