A Fast and High-Accuracy Real-Time Visible Light Positioning System Based on Single LED Lamp With a Beacon

• Published in: IEEE photonics journal Vol. 12; no. 6; pp. 1 - 12
• Main Authors: Li, Huaping, Huang, Hongbin, Xu, Yongze, Wei, Zhanhang, Yuan, Sichen, Lin, Puxi, Wu, Hao, Lei, Wen, Fang, Junbin, Chen, Zhe
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.12.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Accuracy; Complexity; Computational complexity; Image sensors; LED lamps; Light emitting diodes; real-time; Real-time systems; Search algorithms; single LED VLP; unbalanced single-LED VLP algorithm; Visible light communication; Visible light positioning(VLP)
• ISSN: 1943-0655; 1943-0655; 1943-0647
• DOI: 10.1109/JPHOT.2020.3032448

With the advantages of high positioning accuracy and low cost, visible light positioning (VLP) is becoming a promising solution for practical indoor positioning system. However, most of the VLP systems require at least two VLP LED lamps for accurate position calculation. Therefore, the application of VLP in practical scenarios may be restricted due to this limitation. In this paper, we propose a fast and high-accuracy single-LED based VLP system. Firstly, an unbalanced single-LED VLP algorithm is proposed to increase the positioning accuracy and reduce the computational complexity. Secondly, a fast beacon searching algorithm is proposed to further reduce the processing time for each captured image. Finally, since the proposed algorithms have the advantages of high accuracy and low complexity, the proposed system can also be implemented on a low-end hardware platform. Experimental results show that the average positioning error of the proposed system is decreased to 2.26 cm at the height of 3 m, and the average positioning time is reduced to 6.3 ms on a laptop and 60ms on a low-end embedded platform.