Title:
A radio frequency tag place specific system and a method
Document Type and Number:
Japanese Patent JP6014122
Kind Code:
B2
Abstract:
Determination of the location and bearing of an asset having an RF-tag imbedded therein is accomplished through extended radio frequency triangulation. A beacon arrangement determines the direction of an RF tag from a specially designed beacon node. RF-tag localization is further improved by repeating this measurement from multiple spatially displaced beacon nodes. The beacon nodes are equipped with multiple strategically located antennas and transmit frames with each symbol cyclically switched to a different antenna. The symbols traveling different distances result in phase shifts within the frame received by the RF-tag. From the phase shifts and the known arrangements of the antennas the angle at which the RF-tag is RF visible from the specific beacon node can be estimated. Determination of the signal phase shifts are part of the baseband processing hardware, the rest of the location determination procedure may be realized in software.
Inventors:
Nemet, Joseph G.
Application Number:
JP2014508414A
Publication Date:
October 25, 2016
Filing Date:
April 16, 2012
Export Citation:
Assignee:
MICROCHIP TECHNOLOGY INCORPORATED
International Classes:
G01S5/08; G01S5/10
Domestic Patent References:
| JP2009132477A | ||||
| JP2011014980A | ||||
| JP2003315433A | ||||
| JP2010239398A | ||||
| JP2011510265A |
Foreign References:
| EP0330541A1 | ||||
| US3872477 | ||||
| WO2004027446A1 |
Attorney, Agent or Firm:
Hidesaku Yamamoto
Natsuki Morishita
Natsuki Morishita
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