High-Accuracy Visible Light Positioning Algorithm Using Single LED Lamp With a Beacon

This paper presents a novel indoor visible light positioning algorithm utilizing single light emitting diode (LED) light. In the proposed system, a commercial circular LED light with a beacon and a smartphone served as the transmitter and receiver, respectively. By using the pixel information of the beacon for optical center and position correction, combined with the proportional relationship between the image and the world coordinate scale, precise world coordinates of the receiver can be accurately determined. This algorithm offers a simplified approach without the need for complex mathematical derivations, effectively reducing computational complexity without the need to restrict the orientation of the receiver in the horizontal plane. To validate the effectiveness of the proposed algorithm, an experimental setup has been constructed and tested. Experimental results demonstrate an average positioning error of 1.17 cm at a height of 2 m and a remarkably low average positioning error of 1.00 cm at a height of 1.5 m. The average positioning time of the system is 16.38ms.