TAG: Gérard Lachapelle

PLAN Group Tracks Galileo Satellites for Positioning in Canada

March 15, 2013By

by James T. Curran, Mark Petovello, and Gérard Lachapelle Within a day of their initial activation over central Europe on March 12, Galileo satellites were visible over North America. The PLAN Group of the University of Calgary was successful in capturing and processing the signals from these satellites as they emerged. Galileo PRN 11, 12, and 19 were found and... read more

Innovation: GNSS Antennas and Humans

February 1, 2012By

A Study of Their Interactions
A team of researchers from The University of Calgary report on tests conducted on two different types of GPS antennas operated in the vicinity of a human phantom — an artificial body with similar electromagnetic properties as that of a real human. read more

Low-Complexity Spoofing Mitigation

December 1, 2011By

Most anti-spoofing techniques are computationally complicated or limited to a specific spoofing scenario. A new approach uses a two-antenna array to steer a null toward the direction of the spoofing signals, taking advantage of the spatial filtering and the periodicity of the authentic and spoofing signals. It requires neither antenna-array calibration nor a spoofing detection block, and can be employed as an inline anti-spoofing module at the input of conventional GPS receivers. read more

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Can GNSS Drive V2X?

October 1, 2010By

Communication-enabled vehicle safety has the potential to change transportation’s future, particularly vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I), collectively represented as V2X. An automakers’ consortium conducted extensive field trials to determine GNSS service availability and accuracy for the V2X challenge. read more

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Spoofing Detection and Mitigation with a Moving Handheld Receiver

September 1, 2010By

A single spoofing source has a different spatial signal distribution from the authentic GPS signal. An antenna array can estimate the spatial distribution of the received signal and thus discriminate the spoofing signal from the authentic one. Moving a handheld receiver with a single antenna during signal capture snapshots produces a form of a synthetic array, highly effective in discriminating spoofing signals sourced from a point-source jammer. read more

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