Patent ID: 9158945
Filing Date: 2015-10-13
Classification: G06K

Abstract:
1. A system for defining a radio frequency identification read area, the system comprising: at least one radio frequency identification (RFID) reader operable to read RFID tags within a specified read area; at least one RFID transmitter coupled with the at least one RFID reader, the at least one RFID transmitter operable to radiating a modulated carrier in an area adjacent to the specified read area; wherein the at least one RFID reader is operable to control the at least one RFID transmitter to transmit the modulated carrier only during a preamble transmission of the at least one RFID reader to prevent any RFID tags in the adjacent area from recognizing an interrogation signal from the at least one RFID reader; wherein the preamble transmission of the at least one RFID reader comprises an RFID protocol handshake period, initial command parameter, or calibration signals for setting up of an interrogation round.