Multi-rotor UAV Radar Feature Analysis

When radar measures a moving target,the frequency of the signal received from the target will deviate from the frequency of the transmitted signal,which is called the Doppler-effect.Micro-motion Refers to the vibration or rotation of an object or any component of the object will also have a Doppler-effect in radar.The Doppler-effect caused by micro-motion is called the micro-Doppler effect.The micro-motion feature of each object is unique,the micro-Doppler effect of the object can be used as an important feature to recognize the object.This paper mainly studies the micro-Doppler characteristics of the four-rotor unmanned aerial vehicle and the identification of unmanned aerial vehicle by using micro-Doppler characteristics.First,the research background of target detection and recognition at home and abroad are introduced,and relevant technologies are used to study the characteristics of micro-Doppler.Second,the basic principle and related concepts of micro-Doppler are introduced,Two basic forms of micro-motion are described and demonstrated in detail: rotation and vibration,and their induced micro-Doppler characteristics,At the same time,two basic methods: STFT transform and WVD transform and Doppler signal extraction are in introduced.Third,the introduces of the working mechanism of four-rotor unmanned aerial vehicle,the modeling and micro-Doppler simulation and analysis of the four-rotor unmanned aerial vehicle in various motion states.Four,introduces the principle and process of micro-Doppler measurement experiment design,and elaborately set up the experimental platform.