OSA's Digital Library

Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 16 — Jul. 30, 2012
  • pp: 17711–17721

Statistical moments-based OSNR monitoring for coherent optical systems

Chen Zhu, An V. Tran, Simin Chen, Liang B. Du, Cuong C. Do, Trevor Anderson, Arthur J. Lowery, and Efstratios Skafidas  »View Author Affiliations

Optics Express, Vol. 20, Issue 16, pp. 17711-17721 (2012)

View Full Text Article

Enhanced HTML    Acrobat PDF (1610 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



We present a novel statistical moments-based method for optical signal-to-noise ratio (OSNR) monitoring in polarization-multiplexed (pol-mux) coherent optical systems. This technique only requires the knowledge of the envelope of the equalized signal before phase correction, which can be achieved by using any two arbitrary statistical moments, and it is suitable for both constant and non-constant modulus modulation formats. The proposed estimation method is experimentally demonstrated for 10-Gbaud pol-mux coherent systems using QPSK and 16-QAM. Additionally, numerical simulations are carried out to demonstrate 20-Gbaud systems using 16-QAM and 64-QAM. The results show that the OSNR can be estimated accurately over a wide range of values for QPSK, 16-QAM or 64-QAM systems up to 1920-km long and with up to 50-ps all-order polarization mode dispersion. By setting a proper reference value for calibration, the proposed algorithm also shows good tolerance when the received signal is not well compensated.

© 2012 OSA

OCIS Codes
(060.1660) Fiber optics and optical communications : Coherent communications
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: May 23, 2012
Revised Manuscript: July 5, 2012
Manuscript Accepted: July 5, 2012
Published: July 19, 2012

Chen Zhu, An V. Tran, Simin Chen, Liang B. Du, Cuong C. Do, Trevor Anderson, Arthur J. Lowery, and Efstratios Skafidas, "Statistical moments-based OSNR monitoring for coherent optical systems," Opt. Express 20, 17711-17721 (2012)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. J. Yu and X. Zhou, “Ultra-high-capacity DWDM transmission system for 100G and beyond,” IEEE Commun. Mag.48(3), S56–S64 (2010). [CrossRef]
  2. S. J. Savory, “Digital filters for coherent optical receivers,” Opt. Express16(2), 804–817 (2008). [CrossRef] [PubMed]
  3. K. Roberts, D. Beckett, D. Boertjes, J. Berthold, and C. Laperle, “100G and beyond with digital coherent signal processing,” IEEE Commun. Mag.48(7), 62–69 (2010). [CrossRef]
  4. D. C. Kilper, R. Bach, D. J. Blumenthal, D. Einstein, T. Landolsi, L. Ostar, M. Preiss, and A. E. Willner, “Optical performance monitoring,” J. Lightwave Technol.22(1), 294–304 (2004). [CrossRef]
  5. W. Chen, R. S. Tucker, X. Yi, W. Shieh, and J. Evans, “Optical signal-to-noise ratio monitoring using uncorrelated beat noise,” IEEE Photon. Technol. Lett.17(11), 2484–2486 (2005). [CrossRef]
  6. Y. C. Chung, “Polarization-nulling method for monitoring OSNR in WDM networks,” in Optical Fiber Communication Conference (OFC), paper OThP3 (2006).
  7. 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).
  8. S. D. Dods, T. B. Anderson, K. Clarke, M. Bakaul, and A. Kowalczyk, “Asynchronous sampling for optical performance monitoring,” in Optical Fiber Communication Conference (OFC), paper OMM5 (2007).
  9. 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(5), 4931–4938 (2010). [CrossRef] [PubMed]
  10. F. N. Khan, A. P. T. Lau, C. Lu, and P. K. A. Wai, “Joint OSNR and chromatic dispersion monitoring using empirical moments of asynchronously sampled signal amplitudes,” Opto-Electronics and Communications Conference, Paper 6B4_5 (2011).
  11. M. S. Faruk and K. Kikuchi, “Monitoring of optical signal-to-noise ratio using statistical moments of adaptive-equalizer output in coherent optical receivers,” Opto-Electronics and Communications Conference, 233–234 (2011).
  12. D. J. Ives, B. C. Thomasen, R. Maher, and S. Savory, “Estimating OSNR of equalised QPSK signals,” in European Conference and Exhibition on Optical Communication (ECOC), OThH5 (2011).
  13. W. Shieh, R. S. Tucker, W. Chen, X. Yi, and G. Pendock, “Optical performance monitoring in coherent optical OFDM systems,” Opt. Express15(2), 350–356 (2007). [CrossRef] [PubMed]
  14. F. N. Hauske, J. Geyer, M. Kuschnerov, K. Piyawanno, B. Lankl, T. Duthel, C. R. S. Fludger, D. van den Borne, E. D. Schmidt, and B. Spinnler, “Optical performance monitoring from FIR filter coefficients in coherent receivers,” in Proc. Fiber Commun. Conf., paper OthW2 (2008).
  15. M. P. Dlubek, A. J. Phillips, and E. C. Larkins, “Optical signal quality metric based on statistical moments and Laguerre expansion,” Opt. Quantum Electron.40(8), 561–575 (2008). [CrossRef]
  16. B. Porat and B. Friedlander, “Blind equalization of digital communication channels using high-order moments,” IEEE Trans. Signal Process.39(2), 522–526 (1991). [CrossRef]
  17. B. Spinnler, “Equalizer design and complexity for digital coherent receivers,” IEEE Sel. Top. Quantum Electron.16(5), 1180–1192 (2010). [CrossRef]
  18. M. S. Faruk and K. Kikuchi, “Adaptive frequency-domain equalization in digital coherent optical receivers,” Opt. Express19(13), 12789–12798 (2011). [CrossRef] [PubMed]
  19. J. J. K. O. Ruanaidh and W. J. Fitzgerald, Numerical Bayesian Methods applied to Signal Processing (Springer-Verlag, 1995).
  20. G. L. Stuber, Principles of Mobile Communication (Norwell, MA: Kluwer, 1996).
  21. G. Ping and C. Tepedelenlioglu, “SNR estimation for nonconstant modulus constellations,” IEEE Trans. Signal Process.53(3), 865–870 (2005). [CrossRef]
  22. A. V. Tran, C. Zhu, C. C. Do, S. Chen, T. Anderson, D. Hewitt, and E. Skafidas, “8×40-Gb/s optical coherent pol-mux single carrier system with frequency domain equalization and training sequences,” IEEE Photon. Technol. Lett.24(11), 885–887 (2012). [CrossRef]
  23. R. Kudo, T. Kobayashi, K. Ishihara, Y. Takatori, A. Sano, and Y. Miyamoto, “Coherent optical single carrier transmission using overlap frequency domain equalization for long-haul optical systems,” J. Lightwave Technol.27(16), 3721–3728 (2009). [CrossRef]
  24. S. Alamouti, “A simple transmit diversity technique for wireless communications,” IEEE J. Commun.16, 1451–1458 (1998).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited