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:
Mar. 16, 2010
Filed:
Dec. 21, 2007
Julien Basch, South San Francisco, CA (US);
Andrew Chou, South San Francisco, CA (US);
Robert Lorenz, Menlo Park, CA (US);
Jesse Stone, Palo Alto, CA (US);
Julien Basch, South San Francisco, CA (US);
Andrew Chou, South San Francisco, CA (US);
Robert Lorenz, Menlo Park, CA (US);
Jesse Stone, Palo Alto, CA (US);
SirF Technology, Inc., San Jose, CA (US);
Abstract
A method for detecting a positioning signal includes (a) correlating a segment of a received positioning signal with a reference signal of a selected code phase and frequency to obtain a correlation value, (b) if the correlation value is less than a predetermined minimum, assigning the correlation value to the predetermined minimum, and (c) accumulating the correlation value in a sum of correlation values obtained using other segments of the received positioning signal. In addition, the correlation value may be reduced by a predetermined value, which is preferably an expected mean value for a noise component in the segment of the received positioning signal.