Sensitivity Comparison of Software and Commercial GPS Receivers

John J. Schamus, James B.Y. Tsui, David M. Lin and Andrew W. Proud

Abstract:	This paper is to reports the results of sensitivity tests performed on two commercial receivers: An Ashtech Reliance SCA-12 GPS receiver model 800087 and a Plessey GPS builder 2 (346/4/05759/005) and compare them with a software receiver developed by AFRL. This software GPS receiver was designed to process weak signals and a paper has been published(1) detailing its operation. To help in understanding the results of the experiment presented in this paper, a brief description of operating principles of the various functions of the software receiver will be included here. In order to compare the performance of the three receivers in a tightly controlled environment, a Novatel/GSS GPS Wavefront simulator will be used to generate the desired signals. This simulator can provide the same satellite constellation and accurate signal strength for each experiment. The test results of the three receivers will be reported in this paper.
Published in:	Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001) September 11 - 14, 2001 Salt Palace Convention Center Salt Lake City, UT
Pages:	2882 - 2887
Cite this article:	Schamus, John J., Tsui, James B.Y., Lin, David M., Proud, Andrew W., "Sensitivity Comparison of Software and Commercial GPS Receivers," Proceedings of the 14th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2001), Salt Lake City, UT, September 2001, pp. 2882-2887.
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