Title:
METHOD AND SYSTEM FOR INCREASING BIT RATE OF DIGITAL MESSAGES IN LORAN-C NAVIGATION SYSTEMS
Document Type and Number:
WIPO Patent Application WO2002084320
Kind Code:
A3
Abstract:
A method and apparatus for increasing the potential digital bit data rate potential for communication-to-be-added to Loran-C radio-frequency pulse navigation transmitters and the like without affecting the navigation capability and integrity of the system, involving frequency sweeping the pulse carrier frequency between critical lower and upper limits with respects to the pulse carrier frequency during the parts of each pulse following the initial part used for navigation timing.
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Inventors:
PAUL JOHANNESSEN
Application Number:
PCT/IB2002/001133
Publication Date:
April 24, 2003
Filing Date:
April 09, 2002
Export Citation:
Assignee:
MEGAPULSE INC (US)
International Classes:
G01S1/24; G01S5/10; H04B14/02; (IPC1-7): G01S1/24; H04B14/00; G01S1/04
Foreign References:
| US5563611A | 1996-10-08 | |||
| US5550865A | 1996-08-27 | |||
| US4800391A | 1989-01-24 | |||
| US4821038A | 1989-04-11 |
Other References:
PETERSEN B.B. ET AL: "Enhanced Loran-C Data Channel Project", INTERNATIONAL SYMPOSIUM ON INTEGRATION OF LORAN-C/EUROFIX AND EGNOS/GALILEO, 22 March 2000 (2000-03-22) - 23 March 2000 (2000-03-23), Bonn, Germany, pages 1 - 13, XP002224777, Retrieved from the Internet [retrieved on 20021212]
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