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Chinese Journal of Lasers, Volume. 45, Issue 3, 306001(2018)

Hard Decision Iterative Demodulation and Decoding of PPM Multilevel Coded Modulation

Hu Hao1, Zhang Xiao1,2、*, Liu Min1,2, Yang Fan1,2, and An Qi1,2
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  • 1[in Chinese]
  • 2[in Chinese]
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    AbstractGet PDF(in Chinese)
    Figures&Tables (11)
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    Figures & Tables(11)
    Diagram of free space optics PPM multilevel coded modulation system

    Fig. 1. Diagram of free space optics PPM multilevel coded modulation system

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    Diagram of 8-PPM signal set partitioning tree

    Fig. 2. Diagram of 8-PPM signal set partitioning tree

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    Diagram of multiple-step decoding

    Fig. 3. Diagram of multiple-step decoding

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    Structure of iterative demodulation and decoding. (a) Structure for iteration; (b) output update of the ith level for the mth iteration

    Fig. 4. Structure of iterative demodulation and decoding. (a) Structure for iteration; (b) output update of the ith level for the mth iteration

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    Signal set partitioning tree of 8-PPM with a2a3a1 order

    Fig. 5. Signal set partitioning tree of 8-PPM with a2a3a1 order

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    Iterative performance in weak turbulence in order of B1, B2, B3

    Fig. 6. Iterative performance in weak turbulence in order of B1, B2, B3

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    Iterative performance in weak turbulence in order of B1, B3, B2

    Fig. 7. Iterative performance in weak turbulence in order of B1, B3, B2

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    Iterative performance in weak turbulence in order of B3, B2, B1

    Fig. 8. Iterative performance in weak turbulence in order of B3, B2, B1

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    Iterative performance in weak turbulence of different scintillation indexes

    Fig. 9. Iterative performance in weak turbulence of different scintillation indexes

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    Iterative performance in different information channels

    Fig. 10. Iterative performance in different information channels

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    • Table 1. Simulation parameters

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      Table 1. Simulation parameters

      Parameterλ /μmγegT/10-9σχα2/10-25
      Value1.550.510010.1/0.2/0.32
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    Hu Hao, Zhang Xiao, Liu Min, Yang Fan, An Qi. Hard Decision Iterative Demodulation and Decoding of PPM Multilevel Coded Modulation[J]. Chinese Journal of Lasers, 2018, 45(3): 306001

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    Paper Information

    Category: Fiber optics and optical communication

    Received: Jul. 6, 2017

    Accepted: --

    Published Online: Mar. 20, 2018

    The Author Email: Xiao Zhang (55512662@qq.com)

    DOI:10.3788/CJL201845.0306001

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology