Outdoor Position Sensing Using Gps and Active Rfid Beacons.

Abstract

This paper presents an outdoor positioning system based on Global Positioning System(GPS) and Radio Frequency identification (RFID) that can be used for tracking and pursuit. GPS is mainly used to provide location by acquiring signals from 24 satellites and using triangulation to provide accurate location data. It however has limitations since it is affected by weather. In the system developed here, RFID has been used as a complement system to provide a more reliable means of positioning sensing by using the concept of reference tags. The main advantage of this system is the increased accuracy in positioning. It also has key advantages over other position estimation techniques in that it doesn’t require contact or -line-of-sight for operation. The system was tested and the results presented here show that a combination of GPS and RFID provide accurate and affordable means of positioning. Keywords: Localization, outdoor positioning, position sensing, RFID.