Classification and identification method for small light unmanned aerial vehicles and birds based on radar data

Abstract

The invention discloses a classification and identification method for small light unmanned aerial vehicles and birds based on radar data. The classification and identification method for small light unmanned aerial vehicles and birds put forward by the invention is based on target measurement information acquired by radar. Through the four steps of multi-model target tracking, multi-model probability extracting, target motion pattern judging and target motion feature extracting, the target features of a target motion model such as the transformation frequency are extracted finally to distinguish between a small light unmanned aerial vehicle target and a bird target. The defect that a radar surveillance system cannot distinguish between a small light unmanned aerial vehicle and a bird in a low-altitude airspace is overcome. Target motion characteristics are extracted based on radar data to distinguish between a small light unmanned aerial vehicle target and a bird target. The identification capability of a radar surveillance system in a low-altitude airspace is improved.

Description

technical field [0001] The invention relates to a classification and recognition method for light and small unmanned aerial vehicles and flying birds based on radar data, belongs to the technical field of radar target tracking, and relates to radar signal feature extraction and target recognition and classification. Background technique [0002] In recent years, the number of commercial-grade light and small drones has grown rapidly. Light and small UAVs are typical "low, slow, and small" targets, which refer to a type of aircraft with low flying altitude, slow speed, and small target scattering cross-section. , It is difficult to detect and identify, and more importantly, commercial-grade light and small UAVs are easy to be used by terrorists, which seriously threatens national air defense security. [0003] Complex low-altitude surveillance radars have been widely used in low-altitude airspace security surveillance in important sensitive areas and border areas. This type...

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Problems solved by technology

[0004] However, the characteristic information such as the scattering cross section, flight speed, and flight height of biological targets such as birds in the low-altitude airspace are close to those of light and small UAVs. It is difficult for existing low-altitude surveillance radars to distinguish them. police

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