Proposed New Civil GPS Signal at 1176.45 MHz

J. J. Spilker Jr., A.J. Van Dierendonck

Abstract:	The next generation GPS satellites will have three civil signals instead of the present single civil C/A signal at the L1 frequency of 1575.42 MHz. These second generation GPS satellites will have a second C/A signal centered at the L2 frequency of 1227.6 MHz. The largest improvement in civil user performance, however, will be obtained via the third civil signal at L5 of 1176.45 MHz. This proposed L5 signal is a new higher performance civil signal having both a carrier component and a quadrature data modulated component. Both components are modulated with separate PN codes having PN chip clock rates of 10.23 Mcps and periods of 10230 chips or 1 ms. This paper describes the proposed new civil signal, its multiple access properties, and block diagrams of possible satellite modulators and user receivers.
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:	1717 - 1726
Cite this article:	Spilker, J. J., Jr., Van Dierendonck, A.J., "Proposed New Civil GPS Signal at 1176.45 MHz," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 1717-1726.
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