Systems and methods for reading a RFID-tag signal in the presence of noise and other propagation and circuit impairments using a RFID-tag reader are disclosed. The method includes receiving with a RFID-tag reader multiple copies of an original RFID-tag signal from a RFID tag. The original RFID-tag signal...http://www.google.co.uk/patents/US7667574?utm_source=gb-gplus-sharePatent US7667574 - Signal-processing systems and methods for RFID-tag signals
