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
Accuracy characterization for metropolitan-scale Wi-Fi localization
Proceedings of the 3rd international conference on Mobile systems, applications, and services
WBLS: A signal presence-based Wi-Fi localisation system for mobile devices in smart environments
International Journal of Knowledge-based and Intelligent Engineering Systems - Intelligent agents and services for smart environments
Simultaneous localization and mapping for pedestrians using only foot-mounted inertial sensors
Proceedings of the 11th international conference on Ubiquitous computing
Artificial Intelligence: A Modern Approach
Artificial Intelligence: A Modern Approach
Sparsetrack: enhancing indoor pedestrian tracking with sparse infrastructure support
INFOCOM'10 Proceedings of the 29th conference on Information communications
Bayesian inference for localization in cellular networks
INFOCOM'10 Proceedings of the 29th conference on Information communications
Indoor localization without the pain
Proceedings of the sixteenth annual international conference on Mobile computing and networking
LifeMap: A Smartphone-Based Context Provider for Location-Based Services
IEEE Pervasive Computing
Time-Space Sampling and Mobile Device Calibration for WiFi Indoor Location Systems
IEEE Transactions on Mobile Computing
Indoor location sensing using geo-magnetism
MobiSys '11 Proceedings of the 9th international conference on Mobile systems, applications, and services
Mobility prediction-based smartphone energy optimization for everyday location monitoring
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
Place lab: device positioning using radio beacons in the wild
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
No need to war-drive: unsupervised indoor localization
Proceedings of the 10th international conference on Mobile systems, applications, and services
Smartphone-based pedestrian tracking in indoor corridor environments
Personal and Ubiquitous Computing
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With the widespread use of smartphones, the use of location-based services LBS with smartphones has become an active research issue. The accurate measurement of user location is necessary to provide LBS. While outdoor locations are easily obtained with GPS, indoor location information is difficult to acquire. Previous work on indoor location tracking systems often relied on infrastructures that are influenced by environmental changes and temporal differences. Several studies have proposed infrastructure-less systems that are independent of the surroundings, but these works generally required non-trivial computation time or energy costs. In this paper, we propose an infrastructure-less pedestrian tracking system in indoor environments. The system uses accelerometers and magnetic sensors in smartphones without pre-installed infrastructure. We reduced the cumulative error of location tracking by geo-magnetic observations at corners and spots with magnetic fluctuations. In addition, we developed a robust estimation model that is tolerant to false positives, as well as a mobility model that reflects the characteristics of multiple sensors. Extensive evaluation in a real environment indicates that our system is accurate and cost-effective.