Proceedings of the 25th annual conference on Computer graphics and interactive techniques
The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
The cricket compass for context-aware mobile applications
Proceedings of the 7th annual international conference on Mobile computing and networking
Digital Communications and Spread Spectrum System
Digital Communications and Spread Spectrum System
Privacy by Design - Principles of Privacy-Aware Ubiquitous Systems
UbiComp '01 Proceedings of the 3rd international conference on Ubiquitous Computing
Low Cost Indoor Positioning System
UbiComp '01 Proceedings of the 3rd international conference on Ubiquitous Computing
A Novel Broadband Ultrasonic Location System
UbiComp '02 Proceedings of the 4th international conference on Ubiquitous Computing
Broadband Ultrasonic Location Systems for Improved Indoor Positioning
IEEE Transactions on Mobile Computing
Accessible Ultrasonic Positioning
IEEE Pervasive Computing
Preserving location privacy in wireless lans
Proceedings of the 5th international conference on Mobile systems, applications and services
Improving the accuracy of ultrasound-based localisation systems
Personal and Ubiquitous Computing
MyPlace Locator: Flexible Sharing of Location Information
UM '07 Proceedings of the 11th international conference on User Modeling
A security and robustness performance analysis of localization algorithms to signal strength attacks
ACM Transactions on Sensor Networks (TOSN)
Optimal placement of sensors for trilateration: regular lattices vs meta-heuristic solutions
EUROCAST'07 Proceedings of the 11th international conference on Computer aided systems theory
Using GAs to obtain an optimal set of codes for an ultrasonic local positioning system
EUROCAST'07 Proceedings of the 11th international conference on Computer aided systems theory
AI'04 Proceedings of the 17th Australian joint conference on Advances in Artificial Intelligence
Audio location: accurate low-cost location sensing
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
A novel acoustic indoor localization system employing CDMA
Digital Signal Processing
Indoor pseudo-ranging of mobile devices using ultrasonic chirps
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
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Many mobile applications can be greatly enhanced when provided with the locations of people and devices. Ultrasonic location systems have been shown to supply location information with centimeter accuracy at high update rates. Such high-performance systems, however, have relied upon a centralized or coordinated architecture, preventing the user from being in control of how their location information is handled and thus giving rise to privacy concerns.In this paper we present a privacy-oriented location system allowing users with mobile ultrasonic receivers to ascertain their position autonomously. We formulate a method of operation for the system, detail its implementation in a small office, and characterize the performance of the system. The utilization of broadband ultrasound makes it possible for the privacy-oriented location system to have competitive accuracy and high update rates, while allowing the user to be in direct control of their location information.