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:
Jul. 12, 2005
Filed:
Dec. 11, 2000
Charles R. Cahn, Manhattan Beach, CA (US);
Mangesh Chansarkar, Santa Clara, CA (US);
Sanjai Kohli, Manhattan Beach, CA (US);
Charles R. Cahn, Manhattan Beach, CA (US);
Mangesh Chansarkar, Santa Clara, CA (US);
Sanjai Kohli, Manhattan Beach, CA (US);
SiRF Technology, Inc., San Jose, CA (US);
Abstract
A spread spectrum receiver uses a comparison of the magnitude of the code correlation amplitudes at equal power at a one chip spacing to the magnitude at a central position there between to determine if multipath interference is present. The lead or lag error from constructive or destructive multipath interference may also be determined. Inaccuracies due to such interference may then be corrected or minimized by, for example, determining the residual code phase error and/or the prompt or accurate code phase delay.