Exploiting RF-Scatter: Human Localization with Bistatic Passive UHF RFID-Systems

—In ubiquitous computing, localization of users in indoor environments is a challenging issue. On the one hand, localization data needs to have fine granularity to provide reasonable input for intention recognition and task planning. On the other hand, effects like multi-path interference and signal scattering of RF propagation in indoor environments reduces the accuracy of traditional wireless localization techniques. However, we prove that such adversary effects can be characterized and utilized conversely to localize the source of RF-scatter with passive UHF RFID. Since measuring spatial correlation requires many spatially separated transmitter and receiver pairs, cost-effective and unobtrusively attachable passive RFID-tags are especially suitable for this purpose. The passive tags are spatially distributed in a manner such that it is possible to infer the spatial correlation of Received Signal Strength (RSS). The idea is to characterize the influence of user presence on RSS, a...

• Type: Conference
• Year: 2009
• Where: WIMOB
• Authors: Dominik Lieckfeldt, Jiaxi You, Dirk Timmermann
• Keywords: Indoor Environment, Mobile Computing, Spatial Correlation, WIMOB 2009, Wireless Localization Techniques