Uav navigation decoy defense is an advanced technology used to defend, control or capture UAVs. It mainly generates false signals with the same frequency and time synchronization as real navigation satellite positioning signals through simulation, and injects the guidance information into the navigation system of unmanned aerial vehicles, so as to achieve various tactical functions such as no-fly, drive away or track guidance of UAVs. The following is a detailed explanation of the decoy defense of drone navigation:
1. Technical principles
The UAV navigation decoy defense system can complete the calculation and calculation of satellite orbit, satellite clock error, distance delay, ionospheric error, tropospheric error of GPS, GLONASS, Beidou and other satellite navigation systems, and generate the corresponding satellite orbit, navigation messages and observation data. By emitting these false or jamming signals, the system is able to trick the drone's navigation system into misdirecting or disorienting it.
2. Main functions
No-fly function: In certain sensitive areas, such as airport clearance protection areas, the system can misjudge the drone as an unflyable area by sending false signals, forcing it to land automatically or return to the take-off point.
Drive away function: When an unauthorized UAV is detected, the system can guide the UAV to the preset drive away area through guidance information, so as to achieve effective control of the UAV.
Track guidance function: The system can generate specific false track information to induce the UAV to fly according to the preset route, so as to realize the remote control and monitoring of the UAV.
3. Advantages and characteristics
Non-contact defense: Compared with the traditional methods of contact capture, suppression of interference, laser shooting down, etc., the UAV navigation decoy defense system adopts the decoy working principle to drive away or defend the UAV by transmitting low-power decoy signals, avoiding the damage and risks that may be caused by physical contact.
Small impact on the surrounding: the strength of the deception signal output by the system is controllable, which can effectively ensure that it will not interfere with the normal use of other navigation systems outside the protected area, and there is no radiation damage to the human body.
All-weather defense: The system can be deployed in a specific protection area, and users can reasonably deploy single or multiple defense base stations according to the size and environment of the required defense area to build an all-weather UAV no-fly protection area.
4. Application Scenarios
The UAV navigation decoy defense system has been successfully applied in many scenarios, such as airports, large-scale event sites, prisons and so on. At the airport, the system can effectively prevent drones from "black flying" into the clearance protection zone and ensure the safe takeoff and landing of aircraft. In sensitive areas such as large event sites and prisons, the system can also effectively prevent drones from carrying out threats such as illegal filming and throwing objects.
