Anti-UAV passive detection and direction finding positioning system

Abstract

The invention relates to an anti-UAV (unmanned aerial vehicle) passive detection and direction finding positioning system which comprises an array antenna, a radio frequency switching switch, a double-channel receiver, a dual-channel signal processor, a wireless router, a positioning server, and a monitoring terminal. Through the antenna array, the measurement and control and image transmission radio frequency signals emitted by a UAV and an operator are passively intercepted and received, the double-channel receiver carries out frequency conversion of the intercepted and received signals into intermediate frequency signals, the signal detection and parameter estimation of the intermediate frequency signals are carried out, and the characteristic parameter of the UAV is obtained and is sent to the positioning server through the wireless router. After the positioning server receives the characteristic parameter of the UAV, the characteristic parameter of the UAV is subjected to direction finding cross positioning, and the detection, positioning and tracking of the UAV are realized. According to the system, the positioning and tracking of the UAV are realized so as to satisfy safety guarantee of an important key area and UAV countermeasure and interference requirements.

Description

technical field [0001] The invention belongs to the technical field of anti-drone, and specifically relates to a system for passively receiving, detecting and direction-finding the measurement and control and digital transmission signals sent by the drone and its operator. Background technique [0002] In recent years, civil unmanned aerial systems represented by small and medium-sized UAVs (especially small multi-rotor UAVs) are setting off a development boom worldwide. The demand for applications in pipeline monitoring and maintenance, emergency rescue, etc. is growing rapidly. Various types of drones have not only become emerging professional equipment in various industries, but also become common popular tools in the lives of ordinary people. However, as the world's largest producer of civilian drones and a market with the greatest potential for application and development, my country's construction of drone-related regulations and monitoring and management methods lags ...

AI Technical Summary

Problems solved by technology

[0005] Due to the low flying height of low-altitude drones, on the one hand, radar waves may not be able to irradiate the target due to the influence of buildings and the external environment; High false alarm rate

In addition, its flight speed is slow, even lower than the speed detection threshold of the radar, the reflection area is small, the echo signal is weak, and the PD radar cannot effectively detect

[0006] 2) Identify the problem

[0007] Even if the detection problem is solved, the identification of low-altitude drones is still a big problem. On the one hand, due to the slow flying speed of the target, or even hovering, it is easy to be confused with the slow-moving clutter formed by slow-moving targets such as meteorological clutter and birds. Difficulty in target identification, unable to effectively identify the type of target

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