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Laser & Optoelectronics Progress, Volume. 55, Issue 12, 120602(2018)

Low-Density Parity-Check Code for Subcarrier Intensity Modulation in Ultraviolet Communication Systems

Taifei Zhao1,2、*, Yao Qu1, Shan Xu1, Junhu Shao1, and Jie Zhang3
Author Affiliations
  • 1 Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an, Shaanxi 710048, China
  • 2 Sichuan Provincial Key Laboratory of Robot Technology Used for Special Environment, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China
  • 3 School of Photoelectric Information, Beijing University of Posts and Telecommunications, Beijing 100876, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
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    References (20)
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    Figures & Tables(10)
    Schematic of prolate-spheroidal coordinates

    Fig. 1. Schematic of prolate-spheroidal coordinates

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    Single scattering propagation model of non-line-of-sight ultraviolet (UV) communication system

    Fig. 2. Single scattering propagation model of non-line-of-sight ultraviolet (UV) communication system

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    Block diagram of UV communication system

    Fig. 3. Block diagram of UV communication system

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    Flow chart of belief propagation decoding algorithm

    Fig. 4. Flow chart of belief propagation decoding algorithm

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    Normalized channel impulse response of NLOS UV communication

    Fig. 5. Normalized channel impulse response of NLOS UV communication

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    Effect of different modulation methods on bit error rate of system

    Fig. 6. Effect of different modulation methods on bit error rate of system

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    Effect of setting changes on BER of UV system based on BPSK subcarrier intensity modulation. (a) βT=βR=30°, 60°; (b) θT=θR=10°, 22.5°; (c) r=100, 200 m

    Fig. 7. Effect of setting changes on BER of UV system based on BPSK subcarrier intensity modulation. (a) βT=βR=30°, 60°; (b) θT=θR=10°, 22.5°; (c) r=100, 200 m

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    BER performance for different parameters. (a) Different coding efficiencies; (b) different decoding methods

    Fig. 8. BER performance for different parameters. (a) Different coding efficiencies; (b) different decoding methods

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    Bit error rate versus communication distance

    Fig. 9. Bit error rate versus communication distance

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    • Table 1. Simulation parameters

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      Table 1. Simulation parameters

      ParameterValue
      Elevation angles of transmitterand receiverβT=60°,βR=60°
      Half-beam angle of transmitter andhalf-field of view of receiverθT=15°,θR=30°
      Extinction coefficient ke /m-10.74×10-3
      Scattering coefficient ks /m-10.49×10-3
      Distance r /m200
      Communication rate R /(bit·s-1)106
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    Taifei Zhao, Yao Qu, Shan Xu, Junhu Shao, Jie Zhang. Low-Density Parity-Check Code for Subcarrier Intensity Modulation in Ultraviolet Communication Systems[J]. Laser & Optoelectronics Progress, 2018, 55(12): 120602

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: Jun. 13, 2018

    Accepted: Jul. 12, 2018

    Published Online: Aug. 1, 2019

    The Author Email: Taifei Zhao (zhaotaifei@163.com)

    DOI:10.3788/LOP55.120602

    Topics

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