Volume 12 Issue 5
Oct.  2019
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Chinese Optics  > 2019  >  12(5): 1131-1138.
GUAN Hai-jun, LIU Yun-qing, ZHANG Feng-jing. Coherent free-space optical communication system with quadrature phase-shift keying modulation using a digital phase recovery algorithm[J]. Chinese Optics, 2019, 12(5): 1131-1138. doi: 10.3788/CO.20191205.1131
Citation: GUAN Hai-jun, LIU Yun-qing, ZHANG Feng-jing. Coherent free-space optical communication system with quadrature phase-shift keying modulation using a digital phase recovery algorithm[J]. Chinese Optics, 2019, 12(5): 1131-1138. doi: 10.3788/CO.20191205.1131
shu

Coherent free-space optical communication system with quadrature phase-shift keying modulation using a digital phase recovery algorithm

  • 1.

    College of Electronic Information Engineering, Changchun University of Science and Technology, Changchun 130022, China

  • 2.

    Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

  • 3.

    College of Aviation Operations Service, Aviation University of Air Force, Changchun 130022, China

Funds:

National Natural Science Foundation of China 60505201

Jilin Youth Research Foundation for Science and Technology Development 20160520175JH

More Information
  • Corresponding author: LIU Yun-qing
  • Received Date: 04 Apr 2019
  • Rev Recd Date: 04 Jun 2019
  • Publish Date: 01 Oct 2019
    Abstract
  • In recent years, the dilemma regarding the limited performance of coherent free-space optical(CFSO) communication with phase modulation caused by the phase fluctuations and intensity scintillations associated with atmospheric turbulence has gradually become the focus of research. In order to improve system performance, a CFSO communication system with quadrature phase-shift keying modulation(QPSK) is studied in this paper. With consideration of log-normal amplitude fluctuations and Gaussian distribution conditions, a two-stage joint carrier phase recovery(CPR) algorithm is proposed. With this scheme, the simulation results show that the phase noise of the system can be greatly reduced and its symbol error rate is three orders lower than that of the single-stage M-th power CPR algorithm. Therefore, the two-stage joint CPR algorithm holds significant improvement in CFSO communication systems.

     

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