The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 2016
Filed:
Feb. 25, 2008
Ben J. Wild, Sunnyvale, CA (US);
Artem Tkachenko, Fremont, CA (US);
Kannan Ramchandran, El Cerrito, CA (US);
Upamanyu Madhow, Santa Barbara, CA (US);
Ben J. Wild, Sunnyvale, CA (US);
Artem Tkachenko, Fremont, CA (US);
Kannan Ramchandran, El Cerrito, CA (US);
Upamanyu Madhow, Santa Barbara, CA (US);
CHECKPOINT SYSTEMS, INC., Thorofare, NJ (US);
Abstract
Methods and systems for localizing an asset using the modulated backscatter from an asset tag and one or more marker tags are described. The system includes the reader, a location module and one or more marker tags. The location estimates for the asset tag are based partially on a prior knowledge of the location of each of the one or more marker tags. The location for each marker tag may be stored in a database. The location module determines a location estimate for the asset tag using the estimated parameters of the modulated backscatter signals received from one or more marker tags and from the asset tag. Using the known locations of the marker tags, a location estimate of the asset tag can be determined. The location estimate may be a relative location, an absolute location, and/or may be a zone including the marker tags. A mobile reader using the marker tags can localize asset tags throughout a large area and may, for example, take an inventory of assets throughout the large area.