Medium Frequency DGPS Data Link

David H. Pianka, David J. Pietraszewski, Martin C. Poppe Jr., Michael F. Ruane

Abstract:	The U. S. Coast Guard is pursuing the use of radiobeacon transmitters as an economical data link to provide RTCM SC-104 differential GPS data corrections. Thii paper describes the Coast Guard’s efforts to design a radiobeacon broadcast using minimum shift keying (MSK) modulation. Topics covered are a description of the MSK signal in space with spectral plots, the design and implementation considerations of modulating the radiobeacon signal, a description of MSK receiver design using digital signal processing technology, and an analysis of how the MSK signal affects radiobeacon direction finding equipment. Investigation of this technology supports the design of a USCG DGPS navigation service.
Published in:	Proceedings of the 4th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1991) September 11 - 13, 1991 Albuquerque, NM
Pages:	845 - 854
Cite this article:	Pianka, David H., Pietraszewski, David J., Poppe, Martin C., Jr., Ruane, Michael F., "Medium Frequency DGPS Data Link," Proceedings of the 4th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1991), Albuquerque, NM, September 1991, pp. 845-854.
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