February 2001 | Technical Report NTIA TR-01-384
Measurements to Determine Potential Interference to GPS Receivers from Ultrawideband Transmission Systems
Cite This Publication
J. Randy Hoffman et al., “Measurements to Determine Potential Interference to GPS Receivers from Ultrawideband Transmission Systems,” Technical Report NTIA TR-01-384, U.S. Department of Commerce, National Telecommunications and Information Administration, Institute for Telecommunication Sciences, February 2001.
J. Randy Hoffman, Michael G. Cotton 
, Robert J. Achatz , Richard N. Statz, and Roger A. Dalke
Abstract:
This report describes laboratory measurements of Global Positioning System (GPS) receiver vulnerability to ultrawideband (UWB) interference. The laboratory measurements were performed by inserting increased levels of UWB interference until an operating GPS receiver lost lock. At each interference level leading up to loss of lock, reacquisition time, fundamental GPS measurements (e.g., pseudorange and carrier phase), status flags (e.g., potential cycle slips), and position data were sampled. A variety of UWB signals were tested, including aggregates of as many as six UWB sources. Two GPS receivers with different receiver architectures were tested.
Keywords: global positioning system (GPS); noise; ultrawideband (UWB); Impulse Radio; interference measurement; radio frequency interference (RFI); amplitude probability distribution
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