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Line-of-Sight Probability Analysis of Underground Mining Visible Light Communication Diversity Schemes Under Random

Julián Solís1, Iván Sánchez2, Cesar Azurdia-Meza1

  • 1Department of Electrical Engineering, Universidad de Chile, Santiago 8370451, Chile.

Sensors (Basel, Switzerland)
|May 14, 2025
PubMed
Summary

Visible light communication (VLC) in mines faces challenges with receiver orientation. This study provides a formula to calculate the probability of a stable link, crucial for designing better wireless systems.

Keywords:
line-of-sight (LoS) linkoptical diversity schemesoptimal tilt angleunderground mining visible light communication (UM-VLC)visible light communication (VLC)

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Area of Science:

  • Optical wireless communication
  • Wireless communication systems
  • Signal processing

Background:

  • Visible light communication (VLC) offers an alternative to traditional wireless systems but is limited by receiver orientation.
  • Maintaining a reliable line-of-sight (LoS) link is critical for VLC performance, especially in dynamic environments like underground mines.

Purpose of the Study:

  • To derive an analytical expression for the probability of maintaining a LoS link in an underground mining VLC (UM-VLC) system.
  • To analyze the impact of receiver orientation and mobility on link stability.
  • To provide a framework for designing diversity schemes in UM-VLC systems.

Main Methods:

  • Derivation of an analytical expression for LoS link probability considering receiver mobility and orientation.
  • Analysis of single-input single-output (SISO), multiple-input single-output (MISO), and single-input multiple-output (SIMO) configurations.
  • Validation of analytical results against simulated data.

Main Results:

  • The angle of incidence is dependent on the distance from the source, influencing link probability.
  • Analytical and simulated results show strong agreement.
  • Receiver's angular position significantly impacts channel quality, with optimal positions depending on field-of-view.

Conclusions:

  • The derived analytical expression accurately predicts LoS link probability in UM-VLC systems.
  • Receiver orientation is a critical factor affecting channel quality and system performance.
  • Findings offer a basis for optimizing diversity schemes in mobile VLC applications.