標題: CELLI: Indoor Positioning Using Polarized Sweeping Light Beams
作者: Wei, Yu-Lin
Huang, Chang-Jung
Tsai, Hsin-Mu
Lin, Kate Ching-Ju
資訊工程學系
Department of Computer Science
公開日期: 1-一月-2017
摘要: Existing visible light positioning (VLP) systems leverage the high image resolution of a receiving camera to support high positioning accuracy. However, power-hungry cameras might not always be applicable for many scenarios, such as smart factories, in which small objects require to be accurately localized and tracked. In this paper, we introduce CELLI, an indoor VLP system that only uses a single luminary as the transmitter and requires only a simple light sensor to achieve an extremely high accuracy with centimeter-level error. The key idea is to provide the spatial resolution capability from the transmitter instead of the receiver, so that the complexity of the receiver can be minimized. In particular, a small LCD is installed at the transmitter to project a large number of narrow and interference-free polarized light beams to different spatial cells. A receiving light sensor identifies its located cell by detecting the unique polarization-modulated signals projected to that cell. CELLI further incorporates a number of novel designs to overcome the technical challenges such as reducing the positioning latency, which is typically limited by the long optical response time of an LCD, and transforming a cell coordinate to the global 3D position using only a single light. We have prototyped our design using off-the-shelf optical and electrical components, and experimentally shown that CELLI achieves a median 3D positioning error less than 11.8 cm and a median 2D positioning error to less than 2.7 cm.
URI: http://hdl.handle.net/11536/151740
ISBN: 978-1-4503-4928-4
期刊: MOBISYS'17: PROCEEDINGS OF THE 15TH ANNUAL INTERNATIONAL CONFERENCE ON MOBILE SYSTEMS, APPLICATIONS, AND SERVICES
起始頁: 136
結束頁: 147
顯示於類別:會議論文