Patent Number: 6,298,083

Title: Power savings technique for a positioning system receiver

Abstract: A Global Positioning System (GPS) receiver includes multiple correlation segments that can operate in parallel. Each correlation segment has a separate set of accumulators associated with it, embodied in random access memory (RAM). In each of the correlation segments, correlation data associated with an input code and a reference code are generated. The multiple correlation segments are cross-coupled, so that correlation data generated in each correlation segment are added to correlation data generated in each other correlation segment. The combined correlation data in each correlation segment are stored in the accumulators of each corresponding correlation segment, such that the accumulators of only one correlation segment are accessed at a time, reducing power consumption resulting from accessing RAM.

Inventors: Westcott; David C. (Los Gatos, CA), Carlson; Andrew B. (Atherton, CA), Turney; Paul (Woburn, MA), Crerie; Jeffrey (San Francisco, CA)

Assignee: Trimble Navigation Limited

International Classification: G01S 1/00 (20060101); H04B 1/707 (20060101); H04L 027/30 (); H04B 007/185 ()

Expiration Date: 10/02/2018