Estimating OSNR of equalised QPSK signals

doi:10.1364/OE.19.00B661

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)
http://dx.doi.org/10.1364/OE.19.00B661

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Abstract
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Abstract

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.

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

History
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

Citation
David J. Ives, Benn C. Thomsen, Robert Maher, and Seb J. Savory, "Estimating OSNR of equalised QPSK signals," Opt. Express 19, B661-B666 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-26-B661

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References

T. S. R. Shen, A. P. T. Lau, and G. N. Liu, “OSNR monitoring for higher order modulation formats using asynchronous amplitude histogram,” IEEE Photon. Technol. Lett.22, 1632–1634 (2010).
H. Y. Choi, Y. Takushima, and Y. C. Chung, “Optical performance monitoring technique using asynchronous amplitude and phase histograms,” Opt. Express17, 23953–23958 (2009). [CrossRef]
S. D. Dods and T. B. Anderson, “Optical performance monitoring technique using delay tap asynchronous waveform sampling,” in Optical Fiber Communication/National Fiber Optic Engineers Conference, (OFC/NFOEC) (2006). [CrossRef]
J. A. Jargon, X. Wu, H. Y. Choi, Y. C. Chung, and A. E. Willner, “Optical performance monitoring of QPSK data channels by use of neural networks trained with parameters derived from asynchronous constellation diagrams,” Opt. Express18, 4931–4938 (2010). [CrossRef] [PubMed]
E. Ip, A. P. T. Lau, D. J. F. Barros, and J. M. Kahn, “Coherent detection in optical fiber systems,” Opt. Express16, 753–791 (2008). [CrossRef] [PubMed]
S. J. Savory, “Digital coherent optical receivers: algorithms and subsystems,” IEEE J. Sel. Top Quantum Electron.16, 1164–1179 (2010). [CrossRef]
J. J. K. O. Ruanaidh and W. J. Fitzgerald, Numerical Bayesian Methods Applied to Signal Processing (Springer-Verlag, 1995).
S. O. Rice, “Mathematical analysis of random noise,” Bell Syst. Tech. J.23, 282–332 (1944).
S. O. Rice, “Mathematical analysis of random noise,” Bell Syst. Tech. J.24, 46–156 (1945).
J. Sijbers, A. J. den Dekker, P. Scheunders, and D. V. Dyck, “Maximum-likelihood estimation of Rician distribution parameters,” IEEE Trans. Med. Imaging17, 357–361 (1998). [CrossRef] [PubMed]
K. K. Talukdar and W. D. Lawing, “Estimation of the parameters of the Rice distribution,” J. Acoust. Soc. Am.89, 1193–1197 (1991). [CrossRef]
C. G. Koay and P. J. Basser, “Analytically exact correction scheme for signal extraction from noisy magnitude MR signals,” J. Mag. Reson.179, 317–322 (2006). [CrossRef]
International Telecommunication Union, “Forward error correction for high bit-rate DWDM submarine systems,” ITU-T recommendation G.975.1 (2004).

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[1] T. S. R. Shen, A. P. T. Lau, and G. N. Liu, “OSNR monitoring for higher order modulation formats using asynchronous amplitude histogram,” IEEE Photon. Technol. Lett.22, 1632–1634 (2010).

[2] H. Y. Choi, Y. Takushima, and Y. C. Chung, “Optical performance monitoring technique using asynchronous amplitude and phase histograms,” Opt. Express17, 23953–23958 (2009). [CrossRef]

[3] S. D. Dods and T. B. Anderson, “Optical performance monitoring technique using delay tap asynchronous waveform sampling,” in Optical Fiber Communication/National Fiber Optic Engineers Conference, (OFC/NFOEC) (2006). [CrossRef]

[4] J. A. Jargon, X. Wu, H. Y. Choi, Y. C. Chung, and A. E. Willner, “Optical performance monitoring of QPSK data channels by use of neural networks trained with parameters derived from asynchronous constellation diagrams,” Opt. Express18, 4931–4938 (2010). [CrossRef] [PubMed]

[5] E. Ip, A. P. T. Lau, D. J. F. Barros, and J. M. Kahn, “Coherent detection in optical fiber systems,” Opt. Express16, 753–791 (2008). [CrossRef] [PubMed]

[6] S. J. Savory, “Digital coherent optical receivers: algorithms and subsystems,” IEEE J. Sel. Top Quantum Electron.16, 1164–1179 (2010). [CrossRef]

[7] J. J. K. O. Ruanaidh and W. J. Fitzgerald, Numerical Bayesian Methods Applied to Signal Processing (Springer-Verlag, 1995).

[8] S. O. Rice, “Mathematical analysis of random noise,” Bell Syst. Tech. J.23, 282–332 (1944).

[9] S. O. Rice, “Mathematical analysis of random noise,” Bell Syst. Tech. J.24, 46–156 (1945).

[10] J. Sijbers, A. J. den Dekker, P. Scheunders, and D. V. Dyck, “Maximum-likelihood estimation of Rician distribution parameters,” IEEE Trans. Med. Imaging17, 357–361 (1998). [CrossRef] [PubMed]

[11] K. K. Talukdar and W. D. Lawing, “Estimation of the parameters of the Rice distribution,” J. Acoust. Soc. Am.89, 1193–1197 (1991). [CrossRef]

[12] C. G. Koay and P. J. Basser, “Analytically exact correction scheme for signal extraction from noisy magnitude MR signals,” J. Mag. Reson.179, 317–322 (2006). [CrossRef]

[13] International Telecommunication Union, “Forward error correction for high bit-rate DWDM submarine systems,” ITU-T recommendation G.975.1 (2004).

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Estimating OSNR of equalised QPSK signals