INDOOR LOCALIZATION SYSTEM BASED ON PASSIVE RFID TAGS

摘要

In this paper, we present a low-cost localizationsystem using UHF RFID passive tags in indoor environment.This system can be applied to locate objects or people in anunfamiliar building. Landmark reference tag grid is used inour system. The tag RSSI (Received Signal StrengthIndication) is the main input value for our improved K nearestneighbor algorithm. Path Loss models for an indoorenvironment are also analyzed. The error map and theaccuracy of the reference positions are constructed through thePath Loss model for helping to choose corresponding Kreference positions.