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I believe everyone is no stranger to drones. With the rapid development of drones in China, they have now involved many industries such as agriculture, entertainment, aviation, etc. However, they have also exploited loopholes for criminals to use drones for illegal profits. The best way to deal with this situation is through drone countermeasures. So, how much information do you know about drone countermeasures?
Spectrum detection is also divided into radio spectrum multi-point positioning and radio spectrum multi-point direction finding. Generally, flight control system and image transmission system of UAV will transmit radio signals during flight. Radio monitoring is the process of detecting and identifying drone information by monitoring unencrypted control and image transmission signals.
Its advantages lie in not being limited by the size, material, or building obstruction of drones, without electromagnetic pollution, and can be used for long-term unmanned drone defense missions. The cost and cost of radio spectrum detection equipment is relatively low, and it can be fixed-point deployed in a large range. The disadvantage is the need for multi-point positioning, limited spatial positioning accuracy, and longer tracking and decoding time for encrypted signals. In addition, due to passive reception of signals transmitted by drones, drones in autonomous flight mode or in a radio "silent" state cannot be detected.
The spectrum library belongs to a prior type database, and its detection performance for unknown drone frequency bands is inferior to commonly known models. Due to the fact that some unmanned aerial vehicles currently have the opportunity to perform frequency hopping countermeasures against spectrum detection equipment, it is not possible to track the spectrum of ultra-high frequency hopping unmanned aerial vehicles very well. In the complex electromagnetic environment of cities, passive spectrum detection is prone to interference.
The above is a detailed introduction to the overview of UAV radio spectrum detection technology.