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Photonic Network Communications

, Volume 32, Issue 2, pp 230–235 | Cite as

Post-FEC performance evaluation of coherent QPSK system with an enhanced pilot-aided CPE scheme

  • Haiquan Cheng
  • Huizhong Chen
  • Yan Li
  • Chao Lu
  • Jian Wu
  • Jintong Lin
Article
  • 116 Downloads

Abstract

In this paper, a simple and robust pilot-aided carrier phase estimation scheme with a modified phase unwrapping is proposed. The principle of the proposed phase unwrapping is shown with a step-by-step procedure. Further, we test the post-FEC BER performance for the pilot-aided carrier phase estimation scheme with the traditional and proposed phase unwrapping. For the proposed phase unwrapping, a cycle slip rate reduction of about 10 times is achieved than the case using the traditional phase unwrapping through simulations in the presence of Wiener phase noise. Finally, we present a 2.2 Eb/N0 gain and post-FEC error-free performance with only 0.78 % pilot overhead in a 32-Gbaud QPSK system using soft-decision forward error correction.

Keywords

Pilot-aided CPE Phase unwrapping Differential penalty Soft-decision FEC 

Notes

Acknowledgments

This work was partly supported by 863 program 2013AA014202,2015AA015503, NSFC program 61475022, 61331008, fund of State Key Laboratory of Information Photonics and Optical Communications (BUPT), the fundamental research funds for the central universities, and the research project G-SB38 of the Hong Kong Polytechnic University.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Haiquan Cheng
    • 1
    • 2
  • Huizhong Chen
    • 1
  • Yan Li
    • 1
  • Chao Lu
    • 2
  • Jian Wu
    • 1
  • Jintong Lin
    • 1
  1. 1.State Key Laboratory of Information Photonics and Optical CommunicationsBeijing University of Posts and TelecommunicationsBeijingChina
  2. 2.Department of Electronic and Information EngineeringThe Hong Kong Polytechnic UniversityHung HomHong Kong

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