Pulse or digital communications – Repeaters – Testing
Patent
1994-06-27
1995-03-28
Gregory, Bernarr E.
Pulse or digital communications
Repeaters
Testing
380 34, 342352, 342357, H04L 2730, G01S 502, H04B 7185
Patent
active
054024420
ABSTRACT:
A receiving device for receiving spread spectrum-modulated GPS signal transmitted from GPS (Global Positioning System) satellites to the earth. Received GPS signals are converted into IF signals which are despread-demodulated on the basis of C/A codes, resulting in demodulated PSK signals. Carriers are reproduced from the IF signals and a clock signal for C/A code generator is produced from the reproduced carrier and a local oscillation signal. The PSK signal is demodulated on the basis of a reference frequency of a PLL circuit to obtain a navigation message.
REFERENCES:
patent: 4785463 (1988-11-01), Janc et al.
patent: 4821294 (1989-04-01), Thomas, Jr.
patent: 4894662 (1990-01-01), Counselman
patent: 5093839 (1992-03-01), Kohno et al.
patent: 5134407 (1992-07-01), Lorenz et al.
patent: 5185610 (1993-02-01), Ward et al.
patent: 5293170 (1994-03-01), Lorenz et al.
patent: 5343210 (1994-08-01), Marcuard
patent: 5347284 (1994-09-01), Volpi et al.
Journal of The Institute of Navigation, vol. 25, No. 2, Summer 1978, pp. 95-106, "Principle of Operation of NAVSTAR and System Characteristics", by R. J. Milliken and C. J. Zoller.
Journal of The Institute of Navigation, vol. 25, No. 2, Summer 1978, pp. 121-146, "GPS Signal Structure and Performance Characteristics", by J. J. Spilker, Jr.
Journal of the Institute of Navigation, vol. 28, No. 4, Winter 1981-1982, pp. 353-369, "Applications of a Multiplexed GPS User Set", by C. R. Johnson, Phillip W. Ward, Michael D. Turner and Steven D. Roemerman.
Gregory Bernarr E.
Meller Michael N.
Victor Company of Japan Ltd.
LandOfFree
Receiving device for receiving and demodulating spread spectrum- does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Receiving device for receiving and demodulating spread spectrum-, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Receiving device for receiving and demodulating spread spectrum- will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2257093