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    Area of Science:

    • Optical Communications
    • Wireless Networking
    • Signal Processing

    Background:

    • Visible light communication (VLC) offers a promising alternative for wireless data transmission.
    • Interference between different colors in VLC systems can degrade performance.
    • Existing VLC schemes may struggle with color rendering and flickering.

    Purpose of the Study:

    • To propose a novel VLC scheme that mitigates interference using spatial multiplexing of multiple RGB triplets.
    • To analyze the impact of on-off keying modulation on light emission characteristics (flickering, dimming, color rendering).
    • To investigate the role of metameric properties in the proposed VLC system.

    Main Methods:

    • Utilizing multiple RGB triplets with distinct emission spectra for spatial multiplexing.
    • Employing photodiodes with color filters tuned to each transmitting LED at the receiver.
    • Proposing and evaluating three detection mechanisms: color zero forcing, minimum mean square error estimation, and minimum mean square error equalization.
    • Validating the system through computer simulations and an Arduino board implementation.

    Main Results:

    • The proposed VLC scheme effectively mitigates interference by leveraging spatial multiplexing.
    • Analysis demonstrates the trade-offs between modulation, light emission quality, and metamerism.
    • The evaluated detection mechanisms show varying degrees of success in improving system performance.
    • Experimental validation confirms the feasibility and performance of the proposed system.

    Conclusions:

    • The novel VLC scheme provides a robust solution for interference management in color-based systems.
    • The study highlights the importance of considering modulation effects and metameric properties for practical VLC deployment.
    • The proposed detection techniques offer pathways for enhancing the reliability and efficiency of VLC receivers.