RFID based Indoor Positioning System

Radio frequency identification (RFID) is the technology that put an RFID tag on objects or people, so that they can be identified, tracked, and managed automatically. With its wide application in the automobile assembly industry, warehouse management and the supply chain network. To meet the indoor requirements, the technique of RFID (Radio Frequency Identification) was utilized to play an important locating role in the implementation of an indoor guidance system. RFID has been recognized as the next promising technology in serving the positioning purpose. Existing positioning technologies such as GPS are not available indoors as the terminal cannot get the signal from satellites. To enhance the availability of the positioning systems for indoors, the development of RFID positioning system for locating objects or people have become a hot topic in recent research. The development and implementation of RFID-based positioning technology are very fast, and some of the main features of the latest RFID technology have rarely or unclearly been presented in the literature, for example, the longest reading range of RFID systems, the smallest tag size and overall commercial application fields. This paper provides an overview of state-of-the-art RFID technology, particularly for the purpose of indoor positioning.