An Indoor Visible Light Positioning System Using Tilted LEDs with High Accuracy

Sensors

Stanislav Zvanovec¹  Neha Chaudhary²  Luis Nero Alves²  Zabih Ghassemlooy³  Hoa Le-Minh³  Othman Isam Younus³ 

[1] Department of Electromagnetic Field, Faculty of Electrical Engineering, Czech Technical University in Prague, 16627 Prague, Czech Republic;Instituto de Telecomunicações and Departamento de Electrónica, Telecomunicações e Informática,Universidade de Aveiro, 3810-193 Aveiro, Portugal;Optical Communications Research Group, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK;

关键词: localization;    visible light communication;    visible light positioning;    received signal strength;    linear least square;    polynomial regression;   

DOI  :  10.3390/s21030920

来源: DOAJ

【 摘 要 】

The accuracy of the received signal strength-based visible light positioning (VLP) system in indoor applications is constrained by the tilt angles of transmitters (Txs) and receivers as well as multipath reflections. In this paper, for the first time, we show that tilting the Tx can be beneficial in VLP systems considering both line of sight (LoS) and non-line of sight transmission paths. With the Txs oriented towards the center of the receiving plane (i.e., the pointing center F), the received power level is maximized due to the LoS components on F. We also show that the proposed scheme offers a significant accuracy improvement of up to ~66% compared with a typical non-tilted Tx VLP at a dedicated location within a room using a low complex linear least square algorithm with polynomial regression. The effect of tilting the Tx on the lighting uniformity is also investigated and results proved that the uniformity achieved complies with the European Standard EN 12464-1. Furthermore, we show that the accuracy of VLP can be further enhanced with a minimum positioning error of 8 mm by changing the height of F.

【 授权许可】

Unknown