Detection of a position of an object

A method and associated system for estimating a position of an object. A radio wave is received from each radio frequency identification (RFID) tag of N RFID tags affixed to the object at different positions at the object (N 2). A position of each RFID tag is detected from the received radio waves....

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Bibliographische Detailangaben
Hauptverfasser:	NISHI SATORU, KAMAYA YAMATO, TANIBAYASHI MAKOTO, YONEZAWA TAKASHI
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	A method and associated system for estimating a position of an object. A radio wave is received from each radio frequency identification (RFID) tag of N RFID tags affixed to the object at different positions at the object (N 2). A position of each RFID tag is detected from the received radio waves. A position of each RFID tag is estimated from analysis of the detected positions. The estimating includes utilizing, for n=1, 2, . . . , N, a specified probability function P(′pn\|pn) denoting a probability that the estimated position of RFID tag n is ′pn if the detected position of RFID tag n is pn, wherein ′pn and pn are vectors from an origin of a coordinate system to the detected position and the estimated position, respectively, of the RFID tag n. The position of the object is ascertained from analysis of the estimated positions.