Wireless Infrared Communications
Wireless Infrared Communications
The Horus WLAN location determination system
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Indoor localization without the pain
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Indoor location sensing using geo-magnetism
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Fundamental analysis for visible-light communication system using LED lights
IEEE Transactions on Consumer Electronics
Proceedings of the 10th international conference on Mobile systems, applications, and services
ArrayTrack: a fine-grained indoor location system
nsdi'13 Proceedings of the 10th USENIX conference on Networked Systems Design and Implementation
PinPoint: localizing interfering radios
nsdi'13 Proceedings of the 10th USENIX conference on Networked Systems Design and Implementation
Epsilon: a visible light based positioning system
NSDI'14 Proceedings of the 11th USENIX Conference on Networked Systems Design and Implementation
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Indoor physical analytics calls for high-accuracy localization that existing indoor (e.g., WiFi-based) localization systems may not offer. By exploiting the ever increasingly wider adoption of LED lighting, in this paper, we study the problem of using visible LED lights for accurate localization. We identify the key challenges and tackle them through the design of Pharos. In particular, we establish and experimentally verify an optical channel model suitable for localization. We adopt BFSK and channel hopping to achieve reliable location beaconing from multiple, uncoordinated light sources over shared light medium. Preliminary evaluation shows that Pharos achieves the 90th percentile localization accuracy of 0.4m and 0.7m for two typical indoor environments. We believe visible light based localization holds the potential to significantly improve the position accuracy, despite few potential issues to be conquered in real deployment.