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:
Apr. 19, 2011
Filed:
Nov. 24, 2004
Daniel Babitch, San Jose, CA (US);
Steven A. Gronemeyer, Cedar Rapids, IA (US);
Lionel Garin, San Jose, CA (US);
Ashutosh Pande, San Jose, CA (US);
Leon Kuo-liang Peng, Mountain View, CA (US);
Gengsheng Zhang, Cupertino, CA (US);
Nicolas Patrick Vantalon, Sunnyvale, CA (US);
Daniel Babitch, San Jose, CA (US);
Steven A. Gronemeyer, Cedar Rapids, IA (US);
Lionel Garin, San Jose, CA (US);
Ashutosh Pande, San Jose, CA (US);
Leon Kuo-Liang Peng, Mountain View, CA (US);
Gengsheng Zhang, Cupertino, CA (US);
Nicolas Patrick Vantalon, Sunnyvale, CA (US);
SiRF Technology Inc., San Jose, CA (US);
Abstract
A frequency phase correction system and method are described that provides a receiver with a greater ability to lock onto relatively weak radio frequency signals by determining and estimating an amount of frequency error in a local frequency reference of the receiver, and using the error estimate to maintain frequency coherence with a received signal, thereby allowing tracking over a longer period of time, enabling longer integration times to capture weaker signals without losing frequency coherence.