Method and apparatus for detecting lock status of a GPS signal

Details Method and apparatus for detecting lock status of a GPS signal Method and apparatus for detecting lock status of a GPS signal

2011-01-11

2011-01-11

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S130000, C375S148000, C375S150000, C375S149000, C375S326000

Reexamination Certificate

active

07869485

ABSTRACT:
An apparatus for detecting lock status of a spread spectrum signal, having a first accumulator, a first calculation unit, a second calculation unit, a second accumulator, a multiplier and a comparator. The first accumulator accumulates an in-phase integration result and a quadrature integration result over a time period. The first calculation unit determines a first evaluation value based on the accumulated in-phase integration result and the accumulated quadrature integration result. The second calculation unit processes the in-phase integration result and the quadrature integration result. The second accumulator accumulates the output of the second calculation unit over the time period. The multiplier determines a second evaluation value by multiplying the accumulated result from the second accumulator with a predetermined value. The comparator compares the first and second evaluation results wherein the comparison result is an indicator of the lock status.

REFERENCES:
patent: 4785463 (1988-11-01), Janc et al.
patent: 5223843 (1993-06-01), Hutchinson
patent: 5963582 (1999-10-01), Stansell, Jr.
patent: 6272189 (2001-08-01), Garin et al.
patent: 7395155 (2008-07-01), Hsu
patent: 2002/0015439 (2002-02-01), Kohli et al.
patent: 2004/0141549 (2004-07-01), Abraham et al.
patent: 2006/0022868 (2006-02-01), Awata
patent: 2007/0076788 (2007-04-01), Jia et al.
patent: 2007/0153880 (2007-07-01), Cartmell
patent: 2007/0201539 (2007-08-01), Yu et al.
patent: 2007020 (2008-12-01), None
patent: 2009005327 (2009-01-01), None

Affiliated with

Also associated with

Rating

Method and apparatus for detecting lock status of a GPS signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for detecting lock status of a GPS signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting lock status of a GPS signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2633254