Patent attributes
A GPS receiver employing advanced spoofer mitigation, geolocation and tracking capabilities through the use of a utility channel coupled in parallel to a tracking channel. The tracking channel tracks the direct signal while the utility channel tracks one or more spoofer signals. A signal from the primary channel is used by the utility channel to locate spoofer signals, with the primary channel operating independently of the utility channel. Three complementary spoofer mitigation methods are disclosed for identifying advanced repeaters and security-compromised spoofers, which may also be used for geolocation of such spoofers: (1) the consistency routine; (2) the nuller routine; and (3) the multiple antennas routine. An improved architecture is disclosed to allow easy upgrading and retrofitting of an existing GPS receiver.
