The Horus WLAN location determination system
Proceedings of the 3rd international conference on Mobile systems, applications, and services
Demonstration of a Wireless Sensor Network for Real-Time Indoor Localisation and Motion Monitoring
IPSN '08 Proceedings of the 7th international conference on Information processing in sensor networks
Pedestrian localisation for indoor environments
UbiComp '08 Proceedings of the 10th international conference on Ubiquitous computing
Towards mobile phone localization without war-driving
INFOCOM'10 Proceedings of the 29th conference on Information communications
Indoor pedestrian navigation system using a modern smartphone
Proceedings of the 12th international conference on Human computer interaction with mobile devices 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
Indoor localization without infrastructure using the acoustic background spectrum
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Smartphone-based pedestrian tracking in indoor corridor environments
Personal and Ubiquitous Computing
Proceeding of the 11th annual international conference on Mobile systems, applications, and services
Walkie-Markie: indoor pathway mapping made easy
nsdi'13 Proceedings of the 10th USENIX conference on Networked Systems Design and Implementation
Walk detection and step counting on unconstrained smartphones
Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing
Hallway based automatic indoor floorplan construction using room fingerprints
Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing
A wearable projector-based gait assistance system and its application for elderly people
Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing
UbiHeld: ubiquitous healthcare monitoring system for elderly and chronic patients
Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication
BlueEye: a system for proximity detection using bluetooth on mobile phones
Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication
Proceedings of the 11th ACM Conference on Embedded Networked Sensor Systems
An intelligent driver location system for smart parking
Expert Systems with Applications: An International Journal
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This paper addresses reliable and accurate indoor localization using inertial sensors commonly found on commodity smartphones. We believe indoor positioning is an important primitive that can enable many ubiquitous computing applications. To tackle the challenges of drifting in estimation, sensitivity to phone position, as well as variability in user walking profiles, we have developed algorithms for reliable detection of steps and heading directions, and accurate estimation and personalization of step length. We've built an end-to-end localization system integrating these modules and an indoor floor map, without the need for infrastructure assistance. We demonstrated for the first time a meter-level indoor positioning system that is infrastructure free, phone position independent, user adaptive, and easy to deploy. We have conducted extensive experiments on users with smartphone devices, with over 50 subjects walking over an aggregate distance of over 40 kilometers. Evaluation results showed our system can achieve a mean accuracy of 1.5m for the in-hand case and 2m for the in-pocket case in a 31m×15m testing area.