What Interferes Drone Signal

1. What Interferes Drone Signal The rampant flying of unauthorized drones leads to the emergence of anti- drone market which is now on the right track. The jamming technology aiming to interfere with and counter unauthorized flying drones is necessary, when drones are used maliciously in civilian and military fields. Professionals in the anti-drone industry said that the current anti-drone technology is still in the exploratory stage. The radio hijacking technology is difficult to achieve due to the encryption of radio signals by various drone manufacturers, and the hacking technology is not easy to commercialize as it has a high threshold. Therefore, the currently anti-drone technology is mainly about jamming and blocking. Anti-drone system jams a drone by blocking its uplink flight control channel and satellite positioning channel, making the drone loses flight control commands and satellite positioning information. Then the drone will not be able to fly normally and it will return, land or crash according to its design. GPS relies on medium orbit satellites. In layman’s terms, the signal reaches the earth surface after tens of thousands of kilometers, which is already very weak. So it is relatively easy to jam GPS signals when the drone is very close to the defender. If you want to deceive the drone, you need to use more complex methods to simulate GPS satellites, which will be much more difficult. Signal Interference At present, to control the drone, people mostly use radio communication technology. This kind of technology transmits high-power interference signals to the target drone and suppresses its control signal. Thus, the drone can be forced to land or return. The jamming gun with an electronic jammer on its frame transmits full-frequency-band jamming signal to the drone, whenever it’s triggered. The jamming signal will make the drone be out of its operator’s control, and automatically land on the ground without the operator’s control signal. Once the drone’s signal is in a state of confusion, it usually has 3 options: drop to the ground, return to the operator, or descend steady. The ND-BD003 Handheld Anti-Drone System, designed by NovoQuad, is one of the anti-drone guns like this. By integrating detection, jamming and recording all in one, the system is frequently used in a variety of low-altitude defense areas to assist combat missions. GPS Spoofing At present, under normal circumstances, most consumer-grade drones prefer GPS navigation for flight control, while civilian GPS signals are unencrypted,

2. which leaves room for GPS spoofing. The main principle of GPS spoofing is to send false geographic location coordinates to the drone’s control system, thereby controlling the navigation system and inducing the drone to fly to a wrong place. GPS signals can be generated by generators, or pre-recorded and then reproduced. The strongest GPS signals are always the first one received by the drone. As long as the artificial GPS signal on the ground is strong enough, it can cover the real GPS signal from space, thereby deceiving the drone’s GPS receiving module.