Interrogator and interrogation system employing the same
First Claim
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1. An interrogator comprising a control and processing system operable on a processor configured to:
- produce a synthetic reference code including a plurality of bits of a reply code from a radio frequency identification (RFID) tag associated with an RFID object;
receive a reply including at least a portion of said reply code from said RFID tag in response to an excitation signal;
correlate said reply with said synthetic reference code to produce a decision signal; and
compare said decision signal against a threshold to verify a presence of said RFID tag.
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Abstract
A control and processing system for use with an interrogator and an interrogation system employing the same. In one embodiment, the control and processing system includes a correlation subsystem having a correlator that correlates a reference code with a reply code from a radio frequency identification (RFID) tag and provides a correlation signal therefrom. The control and processing system also includes a decision subsystem that verifies a presence of the RFID tag as a function of the correlation signal.
7 Citations
20 Claims
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1. An interrogator comprising a control and processing system operable on a processor configured to:
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produce a synthetic reference code including a plurality of bits of a reply code from a radio frequency identification (RFID) tag associated with an RFID object; receive a reply including at least a portion of said reply code from said RFID tag in response to an excitation signal; correlate said reply with said synthetic reference code to produce a decision signal; and compare said decision signal against a threshold to verify a presence of said RFID tag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of operating an interrogator comprising:
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producing a synthetic reference code including a plurality of bits of a reply code from a radio frequency identification (RFID) tag associated with an RFID object; receiving a reply including at least a portion of said reply code from said RFID tag in response to an excitation signal; correlating said reply with said synthetic reference code to produce a decision signal; and comparing said decision signal against a threshold to verify a presence of said RFID tag. - View Dependent Claims (17, 18, 19, 20)
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Specification