Advanced micro-location of RFID tags in spatial environments
First Claim
1. A system for micro-location of RFID tags within a spatial environment comprising:
- a mobile platform having a known location within a three-dimensional (3D) space, wherein a plurality of radio frequency identification (RFID) tags are located within the 3D space;
a plurality of RFID antennas mounted on the mobile platform, wherein backscatter signals of at least one of the RFID tags are collected by at least one of the plurality of RFID antennas and time-synchronized with the known location of the mobile platform in the 3D space at a time of collection; and
a computerized processing device in communication with the plurality of RFID antennas, wherein the computerized processing device performs algorithmic RFID tag localization using at least the collected backscatter signals of the at least one RFID tag and the time-synchronized known location of the mobile platform to determine a micro-location of the at least one RFID tag within the 3D space;
wherein the algorithmic RFID tag localization further comprises;
creating a history of phase and received signal strength indicator (RSSI) of the collected backscatter signals of the at least one RFID tag over a period of time;
evaluating possible RFID tag locations;
simulating a received signal phase and RSSI; and
matching the history of phase and RSSI of the collected backscatter signals to the simulated received signal phase and RSSI.
1 Assignment
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Accused Products
Abstract
Advanced micro-location of RFID tags in 3D and 2D spatial environments includes a mobile platform having a known location within a three-dimensional (3D) space. A plurality of RFID tags is located within the 3D space. A plurality of RFID antennas is mounted on the mobile platform, wherein backscatter signals of at least one of the RFID tags are collected by at least one of the plurality of RFID antennas and time-synchronized with the known location of the mobile platform in the 3D space at a time of collection. A computerized processing device is in communication with the plurality of RFID antennas. The computerized processing device performs algorithmic RFID tag localization using at least the collected backscatter signals of the at least one RFID tag and the time-synchronized known location of the mobile platform to determine a micro-location of the at least one RFID tag within the 3D space.
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Citations
26 Claims
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1. A system for micro-location of RFID tags within a spatial environment comprising:
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a mobile platform having a known location within a three-dimensional (3D) space, wherein a plurality of radio frequency identification (RFID) tags are located within the 3D space; a plurality of RFID antennas mounted on the mobile platform, wherein backscatter signals of at least one of the RFID tags are collected by at least one of the plurality of RFID antennas and time-synchronized with the known location of the mobile platform in the 3D space at a time of collection; and a computerized processing device in communication with the plurality of RFID antennas, wherein the computerized processing device performs algorithmic RFID tag localization using at least the collected backscatter signals of the at least one RFID tag and the time-synchronized known location of the mobile platform to determine a micro-location of the at least one RFID tag within the 3D space; wherein the algorithmic RFID tag localization further comprises; creating a history of phase and received signal strength indicator (RSSI) of the collected backscatter signals of the at least one RFID tag over a period of time; evaluating possible RFID tag locations;
simulating a received signal phase and RSSI; andmatching the history of phase and RSSI of the collected backscatter signals to the simulated received signal phase and RSSI. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for micro-location of RFID tags within a spatial environment, the method comprising steps of:
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providing a plurality of radio frequency identification (RFID) tags within a three dimensional (3D) space; moving a mobile platform, within the 3D space, wherein the mobile platform has a known location; collecting, with a plurality of RFID antennas mounted on the mobile platform, backscatter signals of at least one of the RFID tags; time-synchronizing the collected backscatter signals with the known location of the mobile platform in the 3D space at a time of collection; and performing algorithmic RFID tag localization using at least, the collected backscatter signals of the at least one RFID tag and the time-synchronized known location of the mobile platform, thereby determining a micro-location of the at least one RFID tag within the 3D space; wherein the algorithmic RFID tag localization further comprises; creating a history of phase and received signal strength indicator (RSSI) of the collected backscatter signals of the at least one RFID tag over a period of time; evaluating possible RFID tag locations;
simulating a received signal phase and RSSI; andmatching the history of phase and RSSI of the collected backscatter signals to the simulated received signal phase and RSSI. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for tracking a micro-location of RFID tags within a spatial environment comprising:
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at least one radio frequency identification (RFID) tag moving within a three-dimensional (3D) space; a plurality of RFID antennas fixedly positioned within the 3D space, wherein backscatter signals of the at least one RFID tag is collected by at least one of the plurality of RFID antennas and time-synchronized with a known location of the at least one of the plurality of RFID antennas in the 3D space at a time of collection; and a computerized processing device in communication with the plurality of RFID antennas, wherein the computerized processing device performs algorithmic RFID tag localization using at least the collected backscatter signals of the at least one RFID tag and the time-synchronized known location of the at least one of the plurality of RFID antennas to determine a micro-location of the at least one RFID tag within the 3D space; wherein the algorithmic RFID tag localization further comprises; creating a history of phase and received signal strength indicator (RSSI) of the collected backscatter signals of the at least one RFID tag over a period of time; evaluating possible RFID tag locations;
simulating a received signal phase and RSSI; andmatching the history of phase and RSSI of the collected backscatter signals to the simulated received signal phase and RSSI. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification