A Comparison of CW and Swept CW

Kenneth D. Johnston

Abstract:	The purpose of this paper was to investigate the performance of a twelve channel commercial off-the shelf (COTS) C/A Code GPS receiver in a hostile radio frequency (RF) environment. The two types of jamming signals generated included Continuous Wave (CW) and swept CW. Actual GPS and jamming signals were used in the research. The use of swept CW jamming resulted in pulling the Navstar XR5-M receiver tracking channels off frequency by up to 20 Kilohertz but resulted in a maximum position error of only 220 meters. An interesting result was that the receiver tracking channels actually locked on and tracked the jamming signals. CW jamming of at least one of the XR5-M receiver channels resulted in position errors in the receiver in excess of 12 kilometers.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	149 - 170
Cite this article:	Johnston, Kenneth D., "A Comparison of CW and Swept CW," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 149-170.
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