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US 8,948,279 B2Granted
Interrogator and interrogation system employing the same
AssigneeVeroscan, Inc.
InventorsJohn P. Volpi, Logan Scott, Eric McMurry
Life of this patent
Estimating the term…
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.
Claims20
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.
4 more elements
A method, comprising:
- 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.
3 more elements
Dependencies are inferred from the claim text.