A Prototype WAAS (SBAS) L1/L5 Signal Generator

D. Bobyn, A.J. Van Dierendonck, H. Kroon, M. Clayton, P. Reddan

Abstract:	Future WAAS (SBAS) Geostationary Satellite (GEO) broadcasts will be available at both the GPS L1 and L5 frequencies. Further, the L5 signal will replace the C-Band downlink signal broadcast from the current Inmarsat-3 GEO transponders and this new L5 signal will be controlled independently of the L1 GEO signal. In order to prepare for these future transponder signals in the next generation WAAS, development of a full-scale engineering model prototype L1/L5 Signal Generator was undertaken. The development built on earlier work accomplished under the auspices of the Interagency GPS Executive Board (IGEB) to develop an engineering model L1/L5 receiver to process the new L5 GPS and WAAS signals. This Signal Generator/Receiver combination will also serve as a test bed to validate new WAAS/SBAS signal structures being proposed by RTCA SC159, Working Groups 1 and 2. The combination has been programmed to have this flexibility. This paper presents the development and design of the prototype L1/L5 Signal Generator and its capabilities. It also discusses some test and integration results.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	2760 - 2768
Cite this article:	Bobyn, D., Van Dierendonck, A.J., Kroon, H., Clayton, M., Reddan, P., "A Prototype WAAS (SBAS) L1/L5 Signal Generator," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 2760-2768.
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