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:
Feb. 21, 2006
Filed:
Jan. 15, 2004
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 systematic method for acquiring positioning signals, such as global positioning system (GPS) signals, uses different signal detection algorithms at different stages of signal detection. For example, a method for detecting multiple positioning signals may include first detecting a first positioning signal using a robust but less sensitive signal detection method, such as non-coherent integration. Based on the signal parameter values that allow detection of the first positional signal, detecting a second positioning signal using a more sensitive method, such as coherent integration. In this manner, by capturing the strongest signal first using a robust method, signal detection parameter values common to positioning signals can be narrowed to allow subsequent signal acquisitions using a more sensitive—but computationally more intensive—method.