Comparison of indoor positioning techniques using visible light communication

Visible light communication (VLC) is one of the most widely used indoor positioning technique. It has attracted wide attention in recent decades as it tries to integrate illumination with communication. In this research, the triangulation of the received signal strength (RSS) algorithm, based on indoor VLC positioning system, is utilized, where LED light is the transmitter and a photo detector is the receiver. The receiver detects the signal power from different paths including diffuse and direct path to calculate the distance between the transmitter and receiver. Then, the received power that reflected of each wall from the room reflections is analyzed on the receiver surface. To this end, the performance of linear least square (LLS) approach is evaluated by cumulative distribution function (CDF) of the positioning errors. To be more precise, the errors are estimated for all the locations over the room and compared with two different LED pattern of rooms. The simulation results show that the proposed system is capable of achieving a much higher positioning accuracy with lower complexity meanwhile the vertical distance between LEDs and receiver (Rx) surface is equal to 5 m for the first time, whereas in all previous works the vertical distance is lower .