Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Reexamination Certificate
2010-06-02
2011-12-06
Issing, Gregory C. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
C342S357580
Reexamination Certificate
active
08072378
ABSTRACT:
A navigation system for detecting error on Doppler frequencies of a plurality of satellite signals measured by the navigation system is disclosed herein. The navigation system includes an offset calculator for calculating offsets of the Doppler frequencies of the satellite signals during a predetermined time period and calculating an average value of the offsets. The navigation system further includes an error detecting unit coupled to the offset calculator. The error detecting unit compares the offsets of the Doppler frequencies of the satellite signals with the average value of the offsets and determines whether the satellite signals are unavailable according to corresponding comparison results.
REFERENCES:
patent: 4069468 (1978-01-01), Bartram
patent: 4242682 (1980-12-01), Musha et al.
patent: 4661816 (1987-04-01), Musha et al.
patent: 5457462 (1995-10-01), Mitsumoto et al.
patent: 6473030 (2002-10-01), McBurney et al.
patent: 6542116 (2003-04-01), Sahai et al.
patent: 6642884 (2003-11-01), Bryant et al.
patent: 6868276 (2005-03-01), Nissila
patent: 7812764 (2010-10-01), Mizuochi et al.
patent: 2002/0032015 (2002-03-01), Kitakado et al.
patent: 2002/0054621 (2002-05-01), Kyeong et al.
patent: 2004/0015308 (2004-01-01), Lee et al.
patent: 2004/0208138 (2004-10-01), Hayashi et al.
patent: 2005/0163201 (2005-07-01), Krasner
patent: 561540 (1993-09-01), None
Spangenberg et al., “Code Acquisition for LEO satellite mobile communication using a serial-parallel correlator with FFT for Doppler estimation”, Signals and System Group, Department of Electrical Engineering, University of Edinburgh, Scotland, undated but cited in 2005 article.
He Xiaoyong
Yu Bo
Yu Xiaoguang
Zou Jinghua
Issing Gregory C.
McGue Frank
O2Micro International Ltd.
Wang Li K.
Wang Law Firm, Inc.
LandOfFree
Navigation system with error-detection on doppler... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Navigation system with error-detection on doppler..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Navigation system with error-detection on doppler... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4314320