Object location system and method using rfid and guard tags

Abstract

A system for locating a RFID tag in a space or area having a physical barrier is disclosed herein. More specifically, the system comprises a plurality of guard tags for use in conjunction with a RFID tag disposed on an item and a RFID reader for locating the same. The system is configured to locate the RFID tag on either side of the physical barrier. The plurality of guard tags may comprise a plurality of negative encoded guard tags and a plurality of positive encoded guard tags, and an algorithm may be used to determine a probability of the RFID tag location within the physical space. A method of locating a RFID tag within a physical space, and a method of virtually shielding the physical space is also disclosed.

Dependencies are inferred from the claim text.