TagRadar is a smart phone accessory that helps users to locate objects with radio frequency tags. We employ a directional antenna and combine signal strength readings with headings obtained from the compass of the smart phone.

While scanning a space by waving the smart phone, the aggregated data is presented on an on-screen polar graph that dynamically reveals the most likely heading of the target object. A user test showed that users favor TagRadar and that it is both faster and has a higher accuracy compared to using only signal strength.

Tracking and locating objects is important in many situations. TagRadar provides an approach to locate items with RF and a single radio that does not require a prepared space with beacons or similar technology.


TagRadar: Locating Objects Using a Smart Phone Accessory. Hyung Sup Felix, Bokyung Lee and Daniel Pieter Saakes. In UbiComp/ISWC'15 Adjunct. 2015. [doi] [bib]