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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 26 — Dec. 12, 2011
  • pp: B661–B666

Estimating OSNR of equalised QPSK signals

David J. Ives, Benn C. Thomsen, Robert Maher, and Seb J. Savory  »View Author Affiliations

Optics Express, Vol. 19, Issue 26, pp. B661-B666 (2011)

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We propose and demonstrate a technique to estimate the OSNR of an equalised QPSK signal based on the radial moments of the complex signal constellation. The technique is compared through simulation with maximum likelihood estimation and the effect of the block size used in the estimation is also assessed. The technique is verified experimentally and when combined with a single point calibration the OSNR of the input signal was estimated to within 0.5 dB.

© 2011 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Subsystems for Optical Networks

Original Manuscript: October 3, 2011
Revised Manuscript: November 15, 2011
Manuscript Accepted: November 19, 2011
Published: December 2, 2011

Virtual Issues
European Conference on Optical Communication 2011 (2011) Optics Express

David J. Ives, Benn C. Thomsen, Robert Maher, and Seb J. Savory, "Estimating OSNR of equalised QPSK signals," Opt. Express 19, B661-B666 (2011)

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