TY - CONF AU - Kuester, Daniel AU - Novotny, David AU - Guerrieri, Jeffrey AU - Direen, Randy AU - Popovic, Zoya C2 - 2011 IEEE International Conference on RFID, Orlando, FL DA - 2011-04-14 LA - en PB - 2011 IEEE International Conference on RFID, Orlando, FL PY - 2011 TI - Reference Modulation for Calibrated Measurements of Tag Backscatter ER -