Visible Light Positioning Using Polarization Array
Date Issued
2015
Date
2015
Author(s)
Huang, Chang-Jung
Abstract
With the rapid development of the solid state lighting technologies, using LED as the lighting source is increasingly common. This becomes an important springboard for the development of “visible light” applications. In this thesis, we proposes LiBeamScanner, a novel indoor visible light positioning system that utilizes only a single custom LED light bulb and a light sensor to achieve extremely high positioning accuracy. Single light bulb means that a dense deployment of illuminaries is unnecessary, and the use of a light sensor, instead of a camera, implies that even systems with strict energy constraints, such as wearable devices, can make use of our system. At the physical layer, we propose a novel transmitter design that allows information to be modulated onto very narrow light beams, projected to a large number of fine-grained locations simultaneously. More importantly, these light beams generate negligible interference to each other, as a result providing a high resolution for enabling accurate positioning. Evaluation results of our prototype show that most of the errors are less than 3cm and the average error does not exceed 5cm.
Subjects
Visible Light
Indoor Positioning
Polarization
Type
thesis
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