System and method for simultaneously collecting serial number information from numerous identity tags

摘要: A system and method for simultaneously collecting serial number information reports from numerous colliding coded-radio-frequency identity tags. Each tag has a unique multi-digit that is stored in non-volatile RAM. reader transmits an ASCII coded "D" character on carrier of about 900 MHz power illumination field having frequency 1.6 Ghz. one tone modulated the Ghz as timing clock microprocessor each Over thousand such tags may be vicinity powered-up clocked by field. looks interrogator carrier, uses digit its to time response. Clear responses received are repeated verification. If no verification or wrong any tag, it second digital together with first out more extended period Ultimately, entire will used worst case collision environments; since numbers defined being unique, final possibility successful because clear time-slot channel available.