Smart Wall: Passive Visible Light Positioning with Ambient Light Only

This paper reports the experimental results from a novel visible light positioning (VLP) system. The developed VLP is completely passive as it does not require the target to carry any active device or tag and, at the same time, it does not require any modification to the lighting infrastructure. The developed VLP localizes a target based on measuring the change it creates in the received signal strength (RSS) of the ambient light recorded at an array of photodiodes embedded in the wall. Experimental results from a prototype system show that a median error of 7.9 cm can be achieved.