Signal Processing Algorithm to Mitigate Interference on an MCM GPS Chipset Receiver

Lisa Giulianelli and Otto Caldwell

Abstract:	Many anti-interference methods for GPS receivers focus on optimizing the correlation process through such methods as narrow-code correlation and dynamic determination of the correlation peak shape. For these methods the receiver’s 2-bit digitization process (magnitude and sign) is not a limitation. However, the need for a broader cl&s of interference mitigation algorithms requires a pre-correlation approach with a greater digitization resolution. Such an approach provides an opportunity to utilize high-dynamic-range digital signal processing (DSP) methods on the GPS signal before it is affected or altered by the correlation process. Based upon this approach, a digital interference mitigation concept validation system was developed and implemented using DSP on a GEC-Plessey GPS Builder multi-chip module (MCM) card. The MCM receiver was used for the implementation because it provided the flexibility to access the signal at different points in the signal path, thereby minimizing cost and development time.
Published in:	Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996) September 17 - 20, 1996 Kansas City, MO
Pages:	1771 - 1776
Cite this article:	Giulianelli, Lisa, Caldwell, Otto, "Signal Processing Algorithm to Mitigate Interference on an MCM GPS Chipset Receiver," Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996), Kansas City, MO, September 1996, pp. 1771-1776.
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