Accuracy of RFID Position Estimation using SAW Compressive Receivers

Nowadays, RFID tags are under use in numerous applications. The communication distance and therefore the ranging distance between base station and RFID tags is strongly limited by the maximum transmission power and the receiver sensitivity. A method based on passive SAW compressive receivers is presented to enhance the transmission distance for RFID tag ranging. The position estimation was done by active transmission of chirp pulses by the RFID tag and ToA and PoA measurements at the receivers.