Multi-Rotor Redirection Algorithm Using GNSS Spoofer and Radar

The rise in drone attacks on key state security infrastructures has led to a high demand for anti-drone technologies. In this regard, global navigation satellite system (GNSS) deception can mislead autopilot drones and redirect them to specific targets. However, existing redirection algorithms for multi-rotors in the Auto and return-to-launch (RTL) modes do not safeguard core facilities effectively. Therefore, this study proposes a practical multi-rotor redirection algorithm that can be applied to security systems. To redirect a multi-rotor to the designated target position in the Loiter, Auto, and RTL modes, a redirection algorithm using a GNSS spoofer and radar is designed that requires no estimation, unlike existing methods that estimate the target position or waypoint of a multi-rotor in the Auto and RTL modes. Redirection to the designated target position from all directions was confirmed through simulations. Furthermore, the multi-rotor redirection algorithm was verified by redirecting a DJI Phantom 4 to a designated target position.