Single LED based Indoor Visible Light Positioning System Using Smartphone Camera and Motion Sensors

(1)A single LED-based indoor visible light positioning (VLP) system using a smartphone as a receiver is proposed. In our system, a common circular LED lamp is used as a transmitter whose image is captured by a smartphone camera. Meanwhile, the real-time rotation angles of the smartphone are detected by the embedded motion sensors. A positioning algorithm that combines the geometric information of the projected LED image and the detected rotation angles is developed to determine receiver's location with a single reference LED lamp. The proposed system enhances the positioning robustness by overcoming possible interruptions in conventional VLP systems which require multiple LEDs to be captured at the same time. The experimental results show that a centimeter-level positioning accuracy can be achieved.