GPS World, September 2010
Security RECEIVER DESIGN Spoofing Detection and Mitigation With a Moving Handheld Receiver U biquitous adoption of and reliance upon GPS makes national and commercial infrastructures increasingly vulnerable to attack by criminals terrorists or hackers Some GNSS signals such as GPS P Y and M code GLONASS P code and Galileos Public Regulated Service have been encrypted to deny unauthorized access however the security threat of corruption of civilian GNSS signals increases constantly and remains an unsolved problem We present here an 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 John Nielsen Ali Broumandan and Gérard Lachapelle www gpsworld com September 2010 GPS World 27
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