The active badge location system
ACM Transactions on Information Systems (TOIS)
The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
VOR base stations for indoor 802.11 positioning
Proceedings of the 10th annual international conference on Mobile computing and networking
Practical robust localization over large-scale 802.11 wireless networks
Proceedings of the 10th annual international conference on Mobile computing and networking
Error characteristics and calibration-free techniques for wireless LAN-based location estimation
Proceedings of the second international workshop on Mobility management & wireless access protocols
The Horus WLAN location determination system
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Pervasive and Mobile Computing
Bayesian Filtering for Location Estimation
IEEE Pervasive Computing
Positioning and Orientation in Indoor Environments Using Camera Phones
IEEE Computer Graphics and Applications
Geo-fencing: Confining Wi-Fi Coverage to Physical Boundaries
Pervasive '09 Proceedings of the 7th International Conference on Pervasive Computing
SAM: enabling practical spatial multiple access in wireless LAN
Proceedings of the 15th annual international conference on Mobile computing and networking
Grid-search-based hybrid TOA/AOA location techniques for NLOS environments
IEEE Communications Letters
Indoor localization without the pain
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Design and experimental evaluation of multi-user beamforming in wireless LANs
Proceedings of the sixteenth annual international conference on Mobile computing and networking
SecureAngle: improving wireless security using angle-of-arrival information
Hotnets-IX Proceedings of the 9th ACM SIGCOMM Workshop on Hot Topics in Networks
Indoor location sensing using geo-magnetism
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Hybrid TDOA/AOA mobile user location for wideband CDMA cellular systems
IEEE Transactions on Wireless Communications
Avoiding multipath to revive inbuilding WiFi localization
Proceeding of the 11th annual 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
Whole-home gesture recognition using wireless signals
Proceedings of the 19th annual international conference on Mobile computing & networking
From RSSI to CSI: Indoor localization via channel response
ACM Computing Surveys (CSUR)
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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Location systems are key to a rich experience for mobile users. When they roam outdoors, mobiles can usually count on a clear GPS signal for an accurate location, but indoors, GPS usually fades, and so up until recently, mobiles have had to rely mainly on rather coarse-grained signal strength readings for location. What has changed this status quo is the recent trend of dramatically increasing numbers of antennas at the indoor AP, mainly to bolster capacity and coverage with multiple-input, multiple-output (MIMO) techniques. In the near future, the number of antennas at the access point will increase several-fold, to meet increasing demands for wireless capacity with MIMO links, spatial division multiplexing, and interference management. We thus observe an opportunity to revisit the important problem of localization with a fresh perspective. This paper presents the design and experimental evaluation of ArrayTrack, an indoor location system that uses MIMO-based techniques to track wireless clients in real time as they roam about a building. We prototype ArrayTrack on a WARP platform, emulating the capabilities of an inexpensive 802.11 wireless access point. Our results show that ArrayTrack can pinpoint 33 clients spread out over an indoor office environment to within a 36 cm location accuracy.