Paper Info
Title
DarkVLP: “Lights-Off” Visible-Light Positioning
Abstract
Visible-light positioning (VLP) has been considered as a promising indoor positioning technology due to its high precision and low cost. However, current VLP techniques are greatly limited by the assumption that lights have to be turned on to emit shining light beams, which is not applicable to scenarios that do not need the illumination all the time. In this article, we design and implement a novel VLP system, DarkVLP, to achieve high-precision positioning when lights are “turned off.” The “turn off” state means lights emit the extremely low luminance that is imperceptible to human eyes. In order to realize such a system, we have to tackle nontrivial challenges in data encoding/decoding, modulation/demodulation, and positioning algorithm. Specifically, we propose the sliding rheostat-based modulation scheme to eliminate the need of a complex signal synchronization mechanism and landmark recognition algorithm at the receiver. We also propose the dual-photodiode-based positioning algorithm, which effectively mitigates effects of substantial signal strength fluctuation, to reliably achieve VLP. In the end, we design novel circuits and prototype our system DarkVLP on commercial off-the-shelf devices. The results of extensive experiments demonstrate that our DarkVLP system could achieve submeter precision under the extremely low luminance, which greatly broadens application scenarios of VLP.
Year
DOI
Venue
2022
10.1109/JIOT.2021.3125795
IEEE Internet of Things Journal
Keywords
DocType
Volume
Energy efficiency,extremely low luminance,visible-light positioning (VLP)
Journal
9
Issue
ISSN
Citations 
13
2327-4662
0
PageRank 
References 
Authors
0.34
29
4
Name
Order
Citations
PageRank
Xiangyu Liu15114.10
Xuetao Wei231931.12
Lei Guo300.34
Song Song400.34