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US 7,889,054 B2Granted
Method and apparatus for creating scramble signals in RFID
AssigneeSeknion, Inc.
InventorThorkild Hansen
Life of this patent
Estimating the term…
Abstract
The disclosed inventions relate to a method and apparatus for creating scramble signals. The disclosed inventions further relate to a method and apparatus for creating scramble signals from data signals. The disclosed inventions also relate to a method and apparatus for creating minimum-energy scramble signals. The disclosed inventions further relate to a method and apparatus for exploiting sleep and wake commands to achieve efficient data and scramble signals.
Claims14
A method for interrogating an RFID tag using an antenna array, comprising the steps of:
- generating from an RF signal source a data signal that causes said RFID tag to respond;
- generating from said RF signal source one or more scramble signals having a bit stream that cause said RFID tag to not respond to said data signal;
- passing said data signal and said one or more scramble signals through a feed network to said antenna array;
- and,
- receiving a response from said RFID tag including information stored on said RFID tag when said RFID tag is located within a region where said data signal overshadows said one or more scramble signals.
2 more elements
A method for interrogating an RFID tag using an antenna array, comprising the steps of:
- generating from an RF signal source a data signal that causes said RFID tag to respond;
- generating from one or more RF scramble signal sources one or more modulated scrambled signals having a bit stream that cause said RFID tag to not respond to said data signal;
- passing said data signal and said one or more modulated scramble signals through a feed network to said antenna array;
- and,
- receiving a response from said RFID tag including information stored on said RFID tag when said RFID tag is located within a region where said data signal overshadows said one or more modulated scramble signals.
2 more elements
Dependencies are inferred from the claim text.