Radar detection system and method for low-altitude multi-target classification and identification

Abstract

The invention discloses a radar detection system and method for low-altitude multi-target classification and identification. The radar detection system for low-altitude multi-target classification andidentification includes a waveform generator, an antenna unit, a reception unit and a signal processing unit, wherein the waveform generator is used for generating detection wave beams in which the energy is concentrated below the specified threshold according to the low-altitude area to be detected; the antenna unit is used for transmitting the detection wave beams output from the waveform generator and receiving a target echo signal; the reception unit is used for performing down-conversion on the target echo signal received by the antenna unit to become an intermediate frequency signal andoutput the intermediate frequency signal; and the signal processing unit is used for acquiring the positional information of the target according to the intermediate frequency signal output from thereception unit and outputting the identified target type. The radar detection method for low-altitude multi-target classification and identification is to realize low-altitude multi-target classification and identification. The radar detection system and method low-altitude multi-target classification and identification can realize real-time detection and classification and identification of low-altitude multiple targets, and have the advantages of high identification efficiency, high accuracy and high flexibility.

Description

technical field [0001] The invention relates to the technical field of low-altitude target radar detection, in particular to a radar detection system and method for low-altitude multi-target classification and recognition. Background technique [0002] Low-altitude flying targets are targets flying in lower airspace (such as below 1km), mainly including birds, drones, model airplanes, hot air balloons, paragliders, and low-altitude penetration weapons. Low-altitude flying targets will seriously affect low-altitude safety. For example, bird strikes on flights have always been a major hidden danger to aviation flight safety. The prevention of birds near the airport is directly related to flight safety. The maturity of technology and the reduction of cost, and the abnormal activity of small drones also pose a great threat to the safety of low altitudes. Therefore, it is necessary to effectively detect low altitude flying targets. [0003] Low-altitude flying targets have the c...

AI Technical Summary

Problems solved by technology

[0003] Low-altitude flying targets have the characteristics of low flying altitude, slow flying speed, extremely small RCS, etc., and are covered by terrain and ground objects. At present, there is no reliable detection and tracking method. If the traditional air defense radar system is used directly Low-altitude target detection, there will be the following problems:

[0004] (1) Due to factors such as the curved surface of the earth, terrain, and obscuration angle of ground objects, the radar beam will affect the low-altitude target, which is very easy to cause missed detection, resulting in low detection accuracy;

[0005] (2) The ground-sea clutter has a great influence on the target echo, which will increase the false alarm rate;

[0006] (3) There are multipath effects in low-altitude detection, which will affect the target echo signal amplitude, which greatly affects the accuracy of target detection and parameter measurement

Images