The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 19, 2017
Filed:
Mar. 28, 2012
Patrick Claus Friedrich Eggers, Lystrup, DK;
Boyan Radkov Yanakiev, Aalborg Ø, DK;
Gert Frølund Pedersen, Storvorde, DK;
Alex Oprea, Toronto, CA;
Patrick Claus Friedrich Eggers, Lystrup, DK;
Boyan Radkov Yanakiev, Aalborg Ø, DK;
Gert Frølund Pedersen, Storvorde, DK;
Alex Oprea, Toronto, CA;
Lyngsoe Systems, Mississauga, CA;
Abstract
A method and system for estimating position of a moving RFID tag is provided. The method includes transmitting at least one interrogator signal; receiving, at an interrogator antenna, a reflected signal from the RFID tag; determining phase changes of the reflected signal with respect to the phase of the at least one interrogator signal; weighting the phase changes based on instant power corresponding to the phase changes; producing a phase trajectory for the reflected signal based on the weighted phase changes; and estimating position of the RFID tag relative to the interrogator antenna based on the peak of the phase trajectory for the reflected signal.