Wideband Dual-Frequency Transform-Domain GPS Instrumentation Receiver for Signal Quality and Anomalous Event Monitoring

Sanjeev Gunawardena, Andrey Soloviev, Frank van Graas

Abstract:	"GPS spectrum is increasingly affected by the ever increasing sources of unintentional and possibly intentional interference. Continuous realtime monitoring of GPS for detection and flagging of satellite anomalies remains a key factor for guaranteeing its integrity and availability for use in critical infrastructures. In addition, reference receivers used for satellite-based and groundbased augmentation systems must be able to detect, measure, and differentiate between the many error sources such as interference, multipath, cross-correlation, satellite malfunctions, ionosphere and troposphere. The research and development associated with the above topics fall into the broad category of signal quality monitoring (SQM) and GNSS anomalous event monitoring (GAEM). Currently available receivers focus on achieving the best measurement accuracies for a given update rate. They largely lack the signal observability required for highfidelity SQM and find it difficult to distinguish between the multiple types of local or satellite anomalies. Ohio UniversityÕs Avionics Engineering Center has been conducting research and development in the area of GPS transform-domain receivers with one of the focal points being signal quality and satellite anomalous event monitoring. This paper reports on the first version of an instrumentation-quality transform-domain receiver that has been developed to address the growing need for high fidelity SQM and GAEM."
Published in:	Proceedings of the 61st Annual Meeting of The Institute of Navigation (2005) June 27 - 29, 2005 Royal Sonesta Hotel Cambridge, MA
Pages:	516 - 527
Cite this article:	Gunawardena, Sanjeev, Soloviev, Andrey, van Graas, Frank, "Wideband Dual-Frequency Transform-Domain GPS Instrumentation Receiver for Signal Quality and Anomalous Event Monitoring," Proceedings of the 61st Annual Meeting of The Institute of Navigation (2005), Cambridge, MA, June 2005, pp. 516-527.
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