Ranging Accuracy Considerations In GPS Interference Suppression

Michael S. Braasch and Christopher A. Snyder, Ronald P. Olin

Abstract:	Electro-Radiation Inc. (ERI) has developed an Interference Suppression Unit (ISU) for GPS which adds more than 20 dB of additional wideband noise interference suppression onto the existing resistance inherent in spread spectrum processing [1]. This performance has been demonstrated in the presence of narrow band interference (CW, Swept CW, Pulsed CW, AM, FM) and wideband Gaussian noise. The ISU is a commercial off-the-shelf (COTS) antenna and electronics unit which plug directly into the antenna port of any GPS receiver. interference. The objective of this paper is to document the results of tests which have been performed to quantify the effect of the ISU on tracking accuracy. Specifically, pseudorange errors are investigated and discussed. The test results show that in the presence of severe interference, not only does the ISU allow a GPS receiver to track satellites, but ranging accuracy is not signficantly affected. ISU test results presented to date have only documented the ability to acquire and track satellites in the presence of
Published in:	Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997) September 16 - 19, 1997 Kansas City, MO
Pages:	1483 - 1487
Cite this article:	Braasch, Michael S., Snyder, Christopher A., Olin, Ronald P., "Ranging Accuracy Considerations In GPS Interference Suppression," Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997), Kansas City, MO, September 1997, pp. 1483-1487.
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