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J. Randy Hoffman, Michael G. Cotton ORCID logo, Google Scholar logo, Scopus logo, Web of Science logo, Robert J. Achatz ORCID logo, Google Scholar logo, Scopus logo, Web of Science logo, and Richard N. Statz

Abstract: This addendum to NTIA Report 01-384 describes laboratory measurements on two additional Global Positioning System receivers to quantify the effects of ultrawideband interference on those receivers. 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 was determined. When possible, fundamental GPS measurements (e.g., pseudorange and carrier phase), status flags (e.g., potential cycle slips), and signal-to-noise ratio were also sampled.

Keywords: global positioning system (GPS); noise; Ultrawideband (UWB); Impulse Radio; interference measurement; radio frequency interference (RFI); amplitude probability distribution

For technical information concerning this report, contact:

Charles R. Dietlein
Institute for Telecommunication Sciences

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

For questions or information on this or any other NTIA scientific publication, contact the ITS Publications Office at or 303-497-3572.

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