Experimental demonstration of an indoor visible light positioning system using RGB LEDs for multi-cell networks

A visible light positioning (VLP) system for multi-cell networks based on multi-colour LED that combines frequency division multiplexing with the received signal strength and a trilateration method is proposed. First, it employs experimental measurements to model the designed visible light communication (VLC) system under the characteristics of the target scenario. Second, it introduces a low-cost VLC transmitter that exploits the chromatic space to transmit the VLP information. Third, it characterizes the VLC transmitter and proposes a linearization for electro-optical responses of RGB LED. An RGB digital colour sensor and simple method calibrate the chromatic emission. The experimental results show that the proposed VLP multi-cell architecture achieves a positioning accuracy lower than 6cm$6\nobreakspace \text{cm}$. Here, we present an experimental demonstration of an indoor visible light positioning (VLP) system using RGB LEDs for multi-cell networks. The contribution of this work is three-fold. First, it employs experimental measurements to model the designed VLC system under the characteristics of the target scenario. Second, it introduces a low-cost VLC transmitter that exploits the chromatic space to transmit the VLP information. Third, it characterizes the VLC transmitter and proposes a linearization for electro-optical responses of RGB LED applied in the VLP system. image