Analysis of Interfered GPS Signals

Jizhang Sang and Kurt Kubik

Abstract:	This paper reports analysis results of interfered GPS signals recorded by QUT GPS receiver during a period of signal interference, which occurred on 24 May 1994 around Brisbane, Australia. It was reported that other GPS receivers in the Brisbane area were apparently jammed during the interference period. The analysis is made for GPS range errors, range rate errors, and range acceleration errors for both C/A code and carrier phase observations. It is found that, 1. Only C/A pseudorange was interfered. 2. The interference noise appears to be white noise with mean of zero and standard deviation of 4 to 6 metres. 3. Position results fluctuated more randomly under effect of the interference than under normal SA conditions. 4. Very large position variation was observed over short period. For example, the variation in height was as large as 180 metres over just 6 seconds. This may have serious consequence for safe navigation. Anti-interference methods are also discussed for this specific kind of signal interference.
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:	1467 - 1472
Cite this article:	Sang, Jizhang, Kubik, Kurt, "Analysis of Interfered GPS Signals," 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. 1467-1472.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In