Indoor three-dimensional location estimation based on LED visible light communication

A novel concept for integrating visible light communications (VLC) with three-dimensional indoor positioning is presented. A VLC link based on transmitter and receiver characteristics using experimental measurements was modelled. Proposed is a three-dimensional positioning algorithm using received signal strength indication, which changes based on the angle and distance of the location based service. To reduce inter-cell interference, the transmitter´s location code was sent using different subcarriers. A demonstration shows that the proposed algorithm can obtain a user´s position, including height, accurately and without inter-cell interference.