• Frontiers of Optoelectronics
  • Vol. 12, Issue 2, 190–196 (2019)
Tianliang WANG and Xiaoying LIU*
Author Affiliations
  • National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information (SOEI), Huazhong University of Science and Technology, Wuhan 430074, China
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    Abstract

    In this paper, we proposed a novel modulation format identification method for square M-quadrature amplitude modulation (M-QAM) signals which is based on amplitude histogram space of the incoming data after analog-to-digital conversion, chromatic dispersion compensation at the receiver. We demonstrated the identification of quadrature phase-shift keying (QPSK), 16-QAM, 64-QAM formats with an amplitude histogram space. Simulation results show that it achieve 100% identification accuracy when the incoming signal OSNR is 14 dB to identify the modulation format of QPSK, 16-QAM, and 64-QAM signals in digital coherent systems. The method has low complexity and small delay.
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    Tianliang WANG, Xiaoying LIU. A novel modulation format identification based on amplitude histogram space[J]. Frontiers of Optoelectronics, 2019, 12(2): 190
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    Received: Feb. 11, 2018
    Accepted: May. 3, 2018
    Posted: Feb. 1, 2019
    Published Online: Nov. 14, 2019
    The Author Email: LIU Xiaoying (liuxy@mail.hust.edu.cn)