Interrogator and interrogation system employing the same
First Claim
Patent Images
1. A control and processing system, comprising:
- a correlation subsystem operable with a processor configured to;
preload amplitude, phase, and delay information corresponding to a logical “
0” and
a logical “
1”
associated with a radio frequency identification (“
RFID”
) tag,preload a reply code of said RFID tag,produce a synthetic reference code from said reply code and said amplitude, phase, and delay information, andcorrelate a reply including at least a portion of said reply code from said RFID tag with said synthetic reference code to produce a decision signal; and
a decision subsystem operable with said processor and configured to 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.
277 Citations
20 Claims
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1. A control and processing system, comprising:
-
a correlation subsystem operable with a processor configured to; preload amplitude, phase, and delay information corresponding to a logical “
0” and
a logical “
1”
associated with a radio frequency identification (“
RFID”
) tag,preload a reply code of said RFID tag, produce a synthetic reference code from said reply code and said amplitude, phase, and delay information, and correlate a reply including at least a portion of said reply code from said RFID tag with said synthetic reference code to produce a decision signal; and a decision subsystem operable with said processor and configured to 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)
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11. A method, comprising:
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preloading amplitude, phase, and delay information corresponding to a logical “
0” and
a logical “
1”
associated with a radio frequency identification (“
RFID”
) tag;preloading a reply code of said RFID tag; producing a synthetic reference code from said reply code and said amplitude, phase, and delay information; correlating a reply including at least a portion of said reply code from said RFID tag 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 (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification