Passive Tracking of Transceiver-Free Users with RFID

Providing location information while people move through a indoor environment is fundamental to smart environments. While many works address this problem, which is often referred to as tracking, the complex radio propagation and the need smart and unobtrusive localization system still represent challenges to current approaches. We investigate through simulations the applicability of tracking a user with a passive RFID-System. The distinction to former approaches is that we do not constrain the user to wear any electronic devices to help localization. Our approach rather focuses on measuring the variations of signal strength which are caused by a human. For this purpose, we have spotted passive RFID to be very useful since the tags can be placed almost on any surface to measure the spatial distribution of the variations.