RIS-assisted optical receiver model and reflected angle optimization for visible light communication in mobile...

Area of Science:

• Optical Communications
• Wireless Networks
• Metamaterials

Background:

• Reconfigurable intelligent surfaces (RIS) enhance wireless networks, particularly visible light communication (VLC) systems, for mobile scenarios.
• Existing RIS-assisted VLC systems suffer from efficiency losses due to RIS diffraction and receiver angular response, limiting practical performance.

Purpose of the Study:

• To address the angle-related efficiency losses in RIS-assisted VLC systems.
• To propose a novel optical receiver model that accounts for RIS and receiver angle-dependent characteristics.
• To optimize beam angle configuration for maximum optical power.

Main Methods:

• Developed a RIS-assisted optical receiver model incorporating angle-related properties of both RIS reflectors and receivers.
• Characterized receiver properties based on the proposed model.
• Optimized the beam angle configuration to maximize received optical power.

Main Results:

• The proposed model accurately reflects the performance of RIS-assisted VLC systems.
• Simulation results validate the optimal reflected angle derived from the model.
• The study demonstrates the practical detection range of the optimized RIS-assisted receiver.

Conclusions:

• The developed model and optimization method effectively mitigate angle-related efficiency losses in RIS-assisted VLC.
• This research provides a pathway for enhanced adaptability and performance in mobile VLC scenarios.
• Further exploration of beam angle configuration is crucial for practical RIS-assisted VLC deployment.