Detection of a position of an object
First Claim
1. A method for estimating a position of an object, said method comprising:
- receiving a radio wave from each radio frequency identification (RFID) tag of N RFID tags affixed to the object at different positions at the object, wherein N is at least 2;
detecting, from the received radio waves, a position of each RFID tag;
estimating, by a processor, a position of each RFID tag from analysis of the detected positions, wherein said estimating comprises 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 ′
pnif the detected position of RFID tag n is pn, and wherein ′
pn and pnare vectors from an origin of a coordinate system to the detected position and the estimated position, respectively, of the RFID tag n; and
said processor ascertaining the position of the object from analysis of the estimated positions.
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Accused Products
Abstract
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 ′pnif the detected position of RFID tag n is pn, wherein ′pn and pnare 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.
13 Citations
20 Claims
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1. A method for estimating a position of an object, said method comprising:
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receiving a radio wave from each radio frequency identification (RFID) tag of N RFID tags affixed to the object at different positions at the object, wherein N is at least 2; detecting, from the received radio waves, a position of each RFID tag; estimating, by a processor, a position of each RFID tag from analysis of the detected positions, wherein said estimating comprises 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 ′
pnif the detected position of RFID tag n is pn, and wherein ′
pn and pnare vectors from an origin of a coordinate system to the detected position and the estimated position, respectively, of the RFID tag n; andsaid processor ascertaining the position of the object from analysis of the estimated positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for estimating a position of an object, said system comprising:
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means for receiving a radio wave from each radio frequency identification (RFID) tag of N RFID tags affixed to the object at different positions at the object, wherein N is at least 2; means for detecting, from the received radio waves, a position of each RFID tag; means for estimating a position of each RFID tag from analysis of the detected positions, wherein said estimating comprises 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 ′
pnif the detected position of RFID tag n is pn, and wherein ′
pn and pnare vectors from an origin of a coordinate system to the detected position and the estimated position, respectively, of the RFID tag n; andmeans for ascertaining the position of the object from analysis of the estimated positions.
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11. A system comprising a receiving unit and a control unit collectively configured to perform a method for estimating a position of an object, said receiving unit coupled to the control unit, said method comprising:
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said receiving unit receiving a radio wave from each radio frequency identification (RFID) tag of N RFID tags affixed to the object at different positions at the object, wherein N is at least 2; said receiving unit detecting, from the received radio waves, a position of each RFID tag; estimating, by a processor of the control unit, a position of each RFID tag from analysis of the detected positions, wherein said estimating comprises 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 ′
pnif the detected position of RFID tag n is pn, and wherein ′
pn and pnare vectors from an origin of a coordinate system to the detected position and the estimated position, respectively, of the RFID tag n; andsaid processor ascertaining the position of the object from analysis of the estimated positions. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification