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    Diffuse light reflection significantly impacts visible light communication (VLC) indoor localization accuracy. Reducing wall reflectivity is key to achieving precise positioning, especially in challenging environments.

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    Area of Science:

    • Optical Engineering
    • Wireless Communication Systems
    • Indoor Positioning Technologies

    Background:

    • Indoor localization systems face challenges in accuracy due to environmental factors.
    • Visible Light Communication (VLC) offers a promising alternative for indoor positioning.
    • Diffuse light reflection, especially in high-reflectivity environments, can degrade localization performance.

    Purpose of the Study:

    • To evaluate the impact of diffuse light reflection on indoor localization accuracy using VLC.
    • To investigate the influence of receiver (Rx) and transmitter (Tx) parameters on localization error.
    • To determine optimal conditions for minimizing localization error in VLC systems.

    Main Methods:

    • Utilized a received signal strength indication (RSSI) technique for localization.
    • Simulated a multipath model in a high reflectivity environment.
    • Analyzed the effects of varying LED power and wall reflectivity factors.
    • Investigated performance at worst-case receiver (Rx) coordinates.

    Main Results:

    • Under harsh conditions (high reflectivity, worst Rx position), localization errors exceeded 1.46 meters.
    • Achieving 30 cm accuracy requires moderate LED power (0.45 W) and low wall reflectivity (ρ=0.1).
    • Optimal conditions (room center, low reflectivity) can yield localization errors as low as 7 mm.

    Conclusions:

    • Diffuse light reflection is a critical factor affecting VLC indoor localization accuracy.
    • Minimizing wall reflectivity is essential for improving positioning precision.
    • System parameters like LED power and wall reflectivity must be carefully considered for robust indoor localization.