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:
Jun. 01, 2010
Filed:
Apr. 30, 2004
Sanjai Kohli, Manhattan Beach, CA (US);
Steven Chen, Cerritos, CA (US);
Charles R. Cahn, Manhattan Beach, CA (US);
Mangesh Chansarkar, Santa Clara, CA (US);
Greg Turetsky, San Jose, CA (US);
Sanjai Kohli, Manhattan Beach, CA (US);
Steven Chen, Cerritos, CA (US);
Charles R. Cahn, Manhattan Beach, CA (US);
Mangesh Chansarkar, Santa Clara, CA (US);
Greg Turetsky, San Jose, CA (US);
SirF Technology, Inc., San Jose, CA (US);
Abstract
A system and a method to track GPS (Global Positioning System) satellite signal in a GPS receiver that includes an expanded capture window to rapidly reacquire the satellite signal after the satellite signal has been obstructed or when there is other type of signal loss. The expanded capture window includes a plurality of additional early and late correlations for maintaining synchronization of the GPS signal with a generated replica signal when positional error has accumulated during the time of the signal loss. The plurality of additional early and late correlations may be delayed from each other by a multiple of a fraction of a chip and may be performed in one or multiple channels of the GPS receiver. The adjoining code samples in the replica signal may also be offset by a fraction of a chip or by a multiple of the fraction of a chip.