An Improved Adaptive Spatial Temporal Selective Attenuator

Ilir F. Progri and William R. Michalson

Abstract:	The vulnerability of the GPS signal against any kind of interference is known. Any interference signal near the band of the GPS signal can saturate the GPS receiver and at the same time can deteriorate the autocorrelation properties of the GPS signal and its PRN code, which results in loss of lock of the GPS signal. An adaptive spatial temporal selective attenuator (ASTSA) can be successfully employed to mitigate these undesired effects of wideband/narrowband interference sources. The investigation of the ASTSA considers the impact of narrowband/wideband interference sources on GPS-like signal autocorrelation properties. The interference effect is removed from the signal coming out of the ASTSA; moreover, this signal has better autocorrelation properties than the input signal, which is corrupted by interference. The signal properties can be further improved if the phase of the signal coming out of the ASTSA is restored. This paper begins to explore the fundamental issues related to the preservation of the GPS signal structure after the interference is removed.
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:	932 - 956
Cite this article:	Progri, Ilir F., Michalson, William R., "An Improved Adaptive Spatial Temporal Selective Attenuator," 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. 932-956.
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