Accurate Indoor Positioning System Based on Visible Light

Abstract

Beside its use in high-rate wireless communications, visible light has recently emerged as an interesting positioning technology, which is referred to as Visible Light Positioning (VLP). Its main advantage is its high positioning accuracy. Like with other positioning technologies, many techniques may be used with VLP, such as Received Signal Strength (RSS), (Difference) Time Of Arrival ((D)TOA), Angle of Arrival (AOA), etc. In this paper, we investigate the use of the RSS technique for VLP. Two new methods are proposed and their performances are compared experimentally to those of three methods from the literature. Both of the proposed methods are based on polynomial fitting. The obtained results show that the second one has a positioning accuracy that is comparable to that of the best method among these three reference methods, while being simpler. It should be highlighted that with only standard low-cost commercial components, we could obtain a very high positioning accuracy, with a mean localization error in the order of 1 cm.