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:
Oct. 20, 2015
Filed:
Nov. 01, 2012
Google Technology Holdings Llc, Mountain View, CA (US);
Julius S Gyorfi, Vernon Hills, IL (US);
Amitkumar N Balar, Mundelein, IL (US);
Shakil Barkat, Gurnee, IL (US);
Sajid I Dalvi, Aurora, IL (US);
Hideki Yoshino, Lake Zurich, IL (US);
GOOGLE TECHNOLOGY HOLDINGS LLC, Mountain View, CA (US);
Abstract
Implementations relate to systems and methods for generating compensated speed values for a Doppler-enabled device. A portable wireless device can contain a GPS navigation engine () to capture position data () and Doppler speed data () from positioning satellites. The device can also generate position-based speed values from successive position readings and time intervals, to determine the current speed independently of the Doppler-based speed values. During degraded signal conditions, the Doppler-based speed values can drop to invalid levels. The device incorporates a combiner module () which compares the position-based and Doppler-based speed values and performs combination operations on those quantities to produce a compensated speed value (). By selecting the maximum or otherwise combining those values, extreme excursions in speed values are avoided and accuracy promoted.