Mark Doggy, a professor at Cornell university, a former mentor of Todd, has proposed a scheme to prevent GPS spoofing. Now, along with graduate students, he has achieved what he describes. His team created an improved GPS drone jammer receiver with an antenna that changed its location at a certain frequency. Because the satellite is located at a considerable distance from each other, and the false signals from the same intimate space, the phase of the carrier in the receiver will change in different ways and be able to recognize deception.
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