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:
Jul. 16, 2019
Filed:
Sep. 10, 2018
Google Llc, Mountain View, CA (US);
Etienne Le Grand, Mountain View, CA (US);
Mohammed Khider, Mountain View, CA (US);
Luigi Bruno, Mountain View, CA (US);
GOOGLE LLC, Mountain View, CA (US);
Abstract
Traces collected by multiple portable devices moving within a geographic area that includes an indoor region, each of the traces including measurements of wireless signals sources at different times by a same device, and at least some of the traces including pseudorange measurements related to distances to respective satellites. Location estimates for the portable devices and the signal sources are generated using graph-based SLAM optimization of the location estimates. More particularly, constraints for the pseudorange measurements are generated and applied for the pseudorange measurements in graph-based SLAM optimization.