Achieving range-free localization beyond connectivity
Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
Localization performance comparison using optimal and sub-optimal lateration in WSNs
APCC'09 Proceedings of the 15th Asia-Pacific conference on Communications
Networked ultrasonic sensors for target tracking: an experimental study
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Proceedings of the 14th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
Sensor Node Localization with Uncontrolled Events
ACM Transactions on Embedded Computing Systems (TECS)
Error analysis of range-based localisation algorithms in wireless sensor networks
International Journal of Sensor Networks
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The proliferation of wireless and mobile devices has fostered the demand of context aware applications. Location is one of the most significant contexts. Multilateration, as a basic building block of localization, however, have not yet overcome the challenges of (1) poor ranging measurement; (2) dynamic and noisy environments; (3) fluctuations in wireless communications. Hence, they often suffer poor accuracy and can hardly be employed in practical applications. In this study, we propose Quality of Trilateration (QoT) that quantifies the geometric relationship of objects and the ranging noise. Based on QoT, we design a confidence based iterative localization scheme, in which nodes dynamically select trilaterations with the highest quality for localization. To validate this design, a wireless sensor network prototype is deployed and results show that QoT well represents trilateration accuracy, and the proposed scheme significantly improve localization performances.