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. 19, 2013
Filed:
Apr. 04, 2012
Gang Xie, Fullerton, CA (US);
Makarand Shankar Phatak, Sunnyvale, CA (US);
Mangesh Chansarkar, Irvine, CA (US);
Anil Kumar Kandangath, Phoenix, AZ (US);
Gang Xie, Fullerton, CA (US);
Makarand Shankar Phatak, Sunnyvale, CA (US);
Mangesh Chansarkar, Irvine, CA (US);
Anil Kumar Kandangath, Phoenix, AZ (US);
CSR Technology Inc., San Jose, CA (US);
Abstract
There are situations where GPS signals are received from less than four satellites. In order to improve the GPS location availability, disclosed here are systems and methods for synthesizing GPS measurements, which, together with fewer than four available real GPS signals, can be used to calculate a position fix. In particular, GPS range measurements for lost satellites, which are satellites that were previously tracked but are now not tracked, are synthesized to improve GPS signal availability. The synthesized measurements are used along with real measurements to enable accurate position fix even when GPS satellite availability is poor. Different synthesized measurement generation schemes, depending on whether an INS/DR aiding system is available, are further described herein.