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

Research output: Journal article publicationJournal articleAcademic researchpeer-review


ÂIn 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.
Original languageEnglish
Pages (from-to)230-235
Number of pages6
JournalPhotonic Network Communications
Issue number2
Publication statusPublished - 1 Oct 2016


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

ASJC Scopus subject areas

  • Software
  • Atomic and Molecular Physics, and Optics
  • Hardware and Architecture
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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