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Active RFID tag in Real Time Location System

This paper proposes a new upcoming model of real time location system (RTLS) to focus and track the exact location of real time objects in vicinity. Overcoming the limitations of size, power, attenuation of GPS & DGPS system, the active RFID tags can be easily affixed with objects. The TIA approach of distance calculation will minimize the errors occurred in RSSI method. Geographically fixed matrix of RFID readers at 50 m to 1 km apart, will monitor, track, and calculate the exact position of tagged-object by communicating with the tag and other co-readers. One 48 MHz PLL enabled 8-bit CPU in RFID reader is enough to calculate the TIA with an accuracy of 3.3 m distance. One active tag with 100 mAh cell can respond many thousands of times using IEEE802.15.4 standard which makes it globally acceptable. DSSS and GFSK used in the tag for more reliable data communication. One central server is enough to store, filter, and handle the calculated data flowing from the matrix net of RFID readers.