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Coverage Analysis of 5G Intelligent High-Speed Railway System Based on Beamwidth-Adaptive Free-Space Optical

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This study introduces a beamwidth-adaptive free-space optical (FSO) communication system for high-speed railways (HSRs). The proposed system enhances coverage performance in narrow-strip cells, crucial for intelligent HSR networks.

Keywords:
beamwidth-adaptiveedge coverage probabilityfree-space optical communicationhigh-speed railwaynarrow-strip-shaped cellpercentage of cell coverage area

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Area of Science:

  • Optical Communications
  • Wireless Networking
  • Transportation Systems Engineering

Background:

  • Intelligent high-speed railways (HSRs) require high-bandwidth mobile communication.
  • Free-space optical (FSO) communication is a viable solution for HSR data transmission.
  • Traditional circular cell coverage models are inadequate for HSR's linear infrastructure.

Purpose of the Study:

  • Investigate the coverage performance of FSO communication in intelligent HSR systems.
  • Address the unique challenge of narrow-strip-shaped cells in HSR FSO networks.
  • Propose and evaluate a beamwidth-adaptive FSO system for improved HSR connectivity.

Main Methods:

  • Developed a beamwidth-adaptive FSO system and method for HSR.
  • Derived closed-form expressions for edge coverage probability (ECP) and cell coverage area (CCA).
  • Validated theoretical models using Monte-Carlo simulations.

Main Results:

  • The beamwidth-adaptive FSO system effectively addresses coverage in narrow-strip HSR cells.
  • Theoretical ECP and CCA expressions show high accuracy, with average relative errors of 0.035% and 0.087%, respectively.
  • Analyzed the impact of cell diameter, transmission power, SNR threshold, and visibility on coverage.

Conclusions:

  • The proposed beamwidth-adaptive FSO system significantly improves coverage performance for intelligent HSR.
  • Accurate theoretical models are established for predicting FSO coverage in HSR environments.
  • The findings provide valuable insights for designing robust FSO communication networks for HSR.