Global positioning system (GPS) software-defined receivers (SDRs) offer many advantages over their hardwarebased counterparts, such as flexibility, modularity, and upgradability. A typical GPS receiver is readily ...

A battery of recorded spoofing scenarios has been compiled for evaluating civil Global Positioning System (GPS) signal authentication techniques. The battery can be considered the data component of an evolving standard ...

Cross-correlations of unknown encrypted signals between two civilian GNSS receivers are used to detect spoofing of known open-source signals. This type of detection algorithm is the strongest known defense against so ...

Test results are presented from over-the-air civil GPS spoofing tests from a non-negligible stand-off distance. These tests were performed at White Sands Missile Range (WSMR) against two systems dependent on civil GPS, ...

A conceptual method is presented for upgrading existing GPS user equipment, without requiring hardware or software modifications to the equipment, to improve the equipment’s position, velocity, and time (PVT) accuracy, to ...

A framework is presented for exploiting the frequency stability of non-GNSS signals to extend the coherence time of inexpensive GNSS receiver clocks. This is accomplished by leveraging stable ambient radio frequency ...

A method is developed to detect GNSS spoofing by processing beat carrier-phase measurements from a pair of antennas in a CDGPS-type calculation. This systemdetects spoofing attacks that are resistant to standard RAIM ...

A real-time method for detecting GPS spoofing in a narrow-bandwidth civilian GPS receiver is being developed. It is needed in order to detect malicious spoofed signals that seek to deceive a C/A-code civilian GPS receiver ...