Directly acquiring precision code GPS signals

Details Directly acquiring precision code GPS signals Directly acquiring precision code GPS signals

2005-02-15

2005-02-15

Phan, Dao (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

C342S357490

Reexamination Certificate

active

06856282

ABSTRACT:
In general, the invention is directed to techniques for directly acquiring P-codes without first acquiring C/A-codes. For example, in one embodiment, a system comprises an assist server to track a P-code signal from a Global Positioning System (GPS) satellite and generate acquisition assistance information from the signal. The system further comprises a mobile unit to receive the acquisition assistance data from the assist server, and to acquire the P-code signal from the satellite based on the acquisition assistance data. The acquisition assistance data may include time-of-week data indicating an initial time offset into a P-code pseudorandom code sequence for the satellite. The mobile unit may include a reference generator to locally generate a reference pseudorandom code sequence based on the time-of-week data.

REFERENCES:
patent: 4445118 (1984-04-01), Taylor et al.
patent: 5615236 (1997-03-01), Turney
patent: 5917444 (1999-06-01), Loomis et al.
patent: 6133873 (2000-10-01), Krasner
patent: 6204808 (2001-03-01), Bloebaum et al.
patent: 6281837 (2001-08-01), Richton et al.
patent: 6473030 (2002-10-01), McBurney et al.
patent: 6625458 (2003-09-01), Pihl et al.
patent: 20020123352 (2002-09-01), Vayanos et al.
patent: 20020168988 (2002-11-01), Younis
Wolfert R et al, “Direct P(Y)-Code Acquisition Under A Jamming Environment”, Position Location and Navigation Symposium, IEEE 1998 Palm Springs, CA, Apr. 20-23, 1998, pp. 228-235.

Affiliated with

Also associated with

Rating

Directly acquiring precision code GPS signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Directly acquiring precision code GPS signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directly acquiring precision code GPS signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3487830