Lyngsoe Systems Limited

Boyan Radkov Yanakiev

Gert Frølund Pedersen

Patrick Claus Friedrich Eggers

Alex Oprea

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.

System and method for wireless communications

A method of detecting position of a moving RFID tag relative to an antenna, includes continually receiving a signal from the RFID tag at the antenna. The phase of the received signal over a time period is detected and, based on a maximum detected phase, the position of the RFID tag relative to the antenna is detected.

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Aalborg, Denmark

Boyan Radkov Yanakiev