A GPS Modernization Simulator

Steve Lazar, Martin Bottjer, Don Watanabe, Steve Craig

Abstract:	The GPS program is undergoing a period of rapid growth and development that requires the system to evolve from a set of signals that serve dual (civil and military) users to separate services with independent signals. The need to produce spectrally isolated signals within the current GPS frequency allocation (frequency reuse) has spawned a number of modulation schemes that require study. In order to test these schemes, a signal simulator was needed that would accommodate a range of code and signal formats. A key simulator requirement was flexibility; this feature will be exercised when the candidate signal structure is chosen. The use of a programmable gate array technology for the multiplexer and coder functions allows for rapid reconfiguration of the simulator. The objectives, design details, as well as future plans for a full scale constellation simulator is discussed.
Published in:	Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998) September 15 - 18, 1998 Nashville, TN
Pages:	1887 - 1893
Cite this article:	Lazar, Steve, Bottjer, Martin, Watanabe, Don, Craig, Steve, "A GPS Modernization Simulator," Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998), Nashville, TN, September 1998, pp. 1887-1893.
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