Ultra low-power RFID tag with precision localization using IR-UWB

Summary form only given, as follows. RFID tag using IR-UWB is promising for ultra low power consumption and precise localization in indoor cluttered environment. An ultra low-power RFID tag with precise localization is proposed. The RFID tag is a transmitter comprising of a micro-controller board and a UWB impulse radio board. Power saving and precision localization is achieved by optimization of the circuit design for ultra short pulses as well as system architecture and operation. The tag consumes 20 uA when pulsing at 10 KHz rate with 15.5 dBm peak transmit power. When 1 s sleep mode is incorporated with 1 ms active mode, the average current consumption is 4 uA. The transmitted pulse is captured by energy-detection receivers at the readers. To recover the time resolution, curve fitting technique is applied. Measurement in a 6m×6m typical indoor environment demonstrates that the proposed system is able to achieve positioning accuracy of 10 cm.