APPARATUS AND METHOD FOR DEFENDING SPOOFING ATTACKS IN CIVILIAN GNSS SIGNALS

摘要

The present invention relates to a method and an apparatus for resolving a problem making a receiver calculate incorrect calculation information due to a spoofing signal making a navigation terminal, which acquires and tracks a navigation signal provided by a global navigation satellite system (GNSS) such as a GPS and calculates own location and time information through a navigation signal processing module, calculate incorrect information. When a navigation signal having the intensity of slightly higher than that of an ordinary navigation signal is transmitted, the navigation terminal automatically acquires and tracks the signal of the high intensity. The device comprises a navigation signal blocker of a hard limiter concept for preventing the signal of the slightly higher intensity from being inputted in a navigation signal acquisition process after an antenna of the navigation terminal, so as to make the navigation terminal process only the signal inputted with the intensity of the ordinary navigation signal in the signal acquisition process. Therefore, the device can prevent the navigation terminal from calculating information including the incorrect location and time information due to spoofing. The device comprises the antenna, a spoofing signal blocking unit and a navigation signal processing unit.;COPYRIGHT KIPO 2016