All-Digital GPS Receiver Mechanization - Six Years Later

J. S. Graham, P. C. Ould, R. J. Van Wechel

Abstract: This paper describes the progress in all-digital hase-band correlation processing of GPS signals at IEC in the past six years. When this technology was in its early stages, it was developed with discrete digital MSI devices. Since then, the progress that has been made in semi-custom gate array technology, and more recently in application specific integrated circuits, has allowed a high degree of development of miniature, low power digital GPS receivers. Several generations of all-digital GPS receiver designs are described. A review of all-digital GPS receiver technology is presented including advances made since the first disclosure of this technology. Also described in the paper are the implementation of the twelve-tap parallel digital correlator, which is used. for both fast acquisition and tracking in the latest receiver development, as well as the numerically controlled oscillator and code generator gate arrays. The P-code generator gate array is designed for fast initialization in less than one millisecond, which allows it to be conveniently fast multiplexed without any requirements for slewing the coding devices.
Published in: Proceedings of the 1987 National Technical Meeting of The Institute of Navigation
January 20 - 23, 1987
Anaheim, CA
Pages: 25 - 31
Cite this article: Graham, J. S., Ould, P. C., Van Wechel, R. J., "All-Digital GPS Receiver Mechanization - Six Years Later," Proceedings of the 1987 National Technical Meeting of The Institute of Navigation, Anaheim, CA, January 1987, pp. 25-31.
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