Wideband GPS Use and Interference

C. Edgar, S. Lazar, S. Raghavan, R. Wong

Abstract:	The military and many civilian users of GPS require the use of all the transmitted GPS navigation signals. Surveying, geodesy, wide-lane carrier tracking and differential monitor stations such as those intended to be used by the Wide Area Augmentation System (WAAS) are among the uses requiring dual-frequency (and therefore wideband) capability. The proliferation of existing and emerging services requiring L-band spectrum use is compelling users of GPS to participate in numerous frequency sharing activities. So far, the majority of activities in national and international forums have focused almost solely on the single- frequency C/A-code user. Furthermore, analytical methods for predicting interference to a spread spectrum receiver are used to draft frequency sharing proposals. As a result, the GPS Joint Program Office and The Aerospace Corporation have become active in the frequency coordination process on national and international levels. One particular area of concern, the issue of protection of the wideband/Ycode user, will be addressed in this paper. The concerns regarding adjacent and co- channel interference from the point of view of the wideband signal user will be raised. The specific example of sharing with Mobile Satellite Service (MSS) will be presented.
Published in:	Proceedings of the 1997 National Technical Meeting of The Institute of Navigation January 14 - 16, 1997 Loews Santa Monica Hotel Santa Monica, CA
Pages:	673 - 682
Cite this article:	Edgar, C., Lazar, S., Raghavan, S., Wong, R., "Wideband GPS Use and Interference," Proceedings of the 1997 National Technical Meeting of The Institute of Navigation, Santa Monica, CA, January 1997, pp. 673-682.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In