Advertisement

A simple amplitude decision based symbol timing synchronization method for real-time IMDD-OOFDM systems

  • Qianwu Zhang
  • Min Liu
  • Junjie Zhang
  • Weiliang Wu
  • Min Wang
  • Jian Chen
Article
  • 18 Downloads

Abstract

A simple amplitude decision based symbol timing synchronization method for real-time IMDD-OOFDM transmission systems is proposed and experimentally evaluated by using directly modulated DFB laser in 25 km SSMF. The experimental results show that the hardware resource consumption of the proposed synchronization technique is only 6% of the total system which can effectively release the computation complexity without sacrificing the synchronization accuracy. Less than 2 samples offset error of synchronization accuracy can be achieved at received optical power as low as − 20 dBm without employing correlation and multiplication operations.

Keywords

Amplitude decision IMDD-OOFDM transmission system Symbol timing synchronization Real-time optical system 

Notes

Acknowledgements

This work was supported in part by National Natural Science Foundation of China (Project Nos. 61601279, 61420106011, 61601277, 61635006); Shanghai Science and Technology Development Funds (Project Nos. 16YF1403900, 17010500400, 16511104100).

References

  1. Chen, M., He, J., Tang, J., Wu, X., Chen, L.: Experimental demonstration of real-time adaptively modulated DDO-OFDM systems with a high spectral efficiency up to 5.76 bit/s/Hz transmission over SMF links. Opt. Express 22, 17691–17699 (2014a)ADSCrossRefGoogle Scholar
  2. Chen, M., He, J., Cao, Z., Tang, J., Chen, L., Wu, X.: Symbol synchronization and sampling frequency synchronization techniques in real-time DDO-OFDM systems. Opt. Commun. 326, 80–87 (2014b)ADSCrossRefGoogle Scholar
  3. Chen, M., He, J., Chen, L.: Real-time demonstration of 1024-QAM OFDM transmitter in short-reach IMDD systems. IEEE Photon. Technol. Lett. 27, 824–827 (2015)ADSCrossRefGoogle Scholar
  4. Cvijetic, N.: OFDM for next-generation optical access network. J. Light. Technol. 30, 384–398 (2012)ADSCrossRefGoogle Scholar
  5. Duong, T.-N., Genay, N., Ouzzif, M., Masson, J.L., Charbonnier, B., Chanclou, P., Simon, J.C.: Adaptive loading algorithm implemented in AMOOFDM for NG-PON system integrating cost-effective and low-bandwidth optical devices. IEEE Photon. Technol. Lett. 21, 790–792 (2009)ADSCrossRefGoogle Scholar
  6. Giddings, R.P., Jin, X.Q., Hugues-Salas, E., Giacoumidis, E., Wei, L., Tang, J.M.: Experimental demonstration of a record high 11.25 Gb/s real-time optical OFDM transceiver supporting 25 km SMF end-to-end transmission in simple IMDD systems. Opt. Express 18, 5541–5555 (2010)ADSCrossRefGoogle Scholar
  7. Jin, X.Q., Tang, J.M.: Optical OFDM synchronization with symbol timing offset and sampling clock offset compensation in real-time IMDD systems. IEEE Photon. J. 3, 187–196 (2011)ADSCrossRefGoogle Scholar
  8. Jin, X.Q., Giddings, R.P., Hugues-salas, E., Tang, J.M.: Real-time experimental demonstration of optical OFDM symbol synchronization in directly modulated DFB laser-based 25 km SMF IMDD systems. Opt. Express 18, 21100–21110 (2010)ADSCrossRefGoogle Scholar
  9. Park, B., Cheon, H., Kang, C., Hong, D.: A novel timing estimation method for OFDM systems. IEEE Commun. Lett. 7, 239–241 (2003)CrossRefGoogle Scholar
  10. Schmidl, T.M., Cox, D.C.: Robust frequency and timing synchronization for OFDM. IEEE Trans. Commun. 45, 1613–1621 (1997)CrossRefGoogle Scholar
  11. Schmogrow, R., Winter, M., Hillerkuss, D., Nebendahl, B., Ben-Ezra, S., Meyer, J., Dreschmann, M., Huebner, M., Becker, J., Koos, C., Freude, W., Leuthold, J.: Real-time OFDM transmitter beyond 100 Gbit/s. Opt. Express 19, 12740–12749 (2011)ADSCrossRefGoogle Scholar
  12. Shieh, W., Djordjevic, I.: OFDM for Optical Communication. Academic Press, New York (2009)Google Scholar
  13. Wang, J., Li, S.H., Li, C., Zhu, L., Gui, C.C., Xie, D.Q., Qiu, Y., Yang, Q., Yu, S.H.: Ultra-high 230-bit/s/Hz spectral efficiency using OFDM/OQAM 64-QAM signals over pol-muxed 22 orbital angular momentum (OAM) modes. In: Proceedings of the 2014 Optical Fiber Communication Conference, San Francisco, USA, 9–13 March 2014Google Scholar
  14. Yu, Z.M., Lou, Y.M., Chen, M.H., Chen, H.W., Yang, S.G., Xie, S.Z.: Adaptive three-dimensional optimization for optical direct-detection OFDM. J. Light. Technol. 35, 1506–1512 (2017)ADSCrossRefGoogle Scholar
  15. Zhang, Q.W., Hugues-Salas, E., Ling, Y., Zhang, H.B., Giddings, R.P., Zhang, J.J., Wang, M., Tang, J.M.: Record-high and robust 17.125 Gb/s gross-rate over 25 KM SSMF transmissions of real-time dual-band optical OFDM signals directly modulated by 1 GHz RSOAs. Opt. Express 22, 6339–6348 (2014)ADSCrossRefGoogle Scholar
  16. Zheng, J., Peng, S.P.: A novel timing synchronization for CO-OFDM systems using chirp signals. Opt. Commun. 285, 4901–4905 (2012)ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Qianwu Zhang
    • 1
  • Min Liu
    • 1
  • Junjie Zhang
    • 1
  • Weiliang Wu
    • 1
  • Min Wang
    • 1
  • Jian Chen
    • 1
  1. 1.Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai Institute for Advanced Communication and Data ScienceShanghai UniversityShanghaiChina

Personalised recommendations