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Whether it’s investigating ways to preserve the security of GPS signals or developing new types of receivers, the field of radionavigation is ripe with possibility—and Dr. Todd Humphreys does not hesitate for a moment in defining how his research team fits into the mix. “What’s the next big thing in GPS?” he asks. “That’s what […]

Austin, TX — Dr. Todd Humphreys briefed the United States Patent and Trademark Office via webcast on the state of the art and future trends in radionavigation on Thursday, 14 April 2011. Examiners were present from the main USPTO site as well as satellite locations. Dr. Humphreys talked about: Overview of Radionavigation/GPS Advances in Weak-Signal GNSS Tracking

Austin, TX — Dr. Mark Psiaki visited RNL on 31 March and 1 April and gave two presentations: Nonlinear Model-Based Estimation Algorithms: Tutorial and Recent Developments [ppt] (BSEKF journal paper) at the Aerospace Department seminar series Civilian GPS Spoofing Detection based on Dual-Receiver Correlation of Military Signals [pptx] at the WNCG seminar series UPDATE: Dr. Psiaki has written a paper

Austin, TX — Members of the Radionavigation Laboratory briefed visitors from the DHS, USCG, NSWC, JNWC, and USSTRATCOM on several aspects of GPS security and integrity including: effects of GPS spoofing on power grid monitoring, anti-spoofing techniques for civil GPS, and GPS interference detection and localization techniques. Meeting Agenda and Participants  Introductory Remarks, Todd Humphreys Thoughts on GPS Security and Integrity, Todd Humphreys

“Signals from GPS satellites now help you to call your mother, power your home, and even land your plane—but a cheap plastic box can jam it all.” Continue reading the NewScientist article, which features a discussion with Dr. Humphreys on GPS spoofing in the “Faking It” section. 

Austin, TX — Members of the Radionavigation Laboratory launched a memorial page for Dr. Paul M. Kintner, Jr. along with Paul’s receiver, a continuously operating receiver in the spirit of an eternal flame. We started Paul’s receiver running this month. We intend to keep it going as long as we can. More tributes to Paul are welcome; please

Austin, TX — Members of the Radionavigation Laboratory went on a full day excursion to capture simultaneous GPS and Cellular CDMA spectrum via the lab’s powerful National Instruments radio frequency signal analyzers. Over 1.5 TB of spectral data were recorded at 37.5 MSps with the goal of characterizing dynamic GPS multipath, exploring tightly-coupled opportunistic navigation, and evaluating GPS jamming mitigation techniques.

“GPS timing signals that control the base stations in some cellular networks and other gadgets the size of small refrigerators that power the smart electric grid can fall prey to sophisticated spoofing attacks, according to a University of Texas researcher. Todd Humphreys, an assistant professor at the University of Texas Radionavigation Laboratory, said he successfully

“Here’s a story to send a shiver down the spine of anyone who relies on their GPS sat nav or mobile. Scientists at Cornell University have managed to trick a GPS receiver into accepting signals from rogue transmitters instead of the genuine orbiting satellites.” Continue reading the TechRadar article.

“A paper presented by Cornell University and Virginia Tech researchers at this year’s ION GNSS conference on the possibility of spoofing GPS has garnered mainstream attention.” Continue reading the GPS World article.