Aircraft Target Blade Echo Model and Analysis Based on LFM Signal

In modern warfare, aircraft are still an important part of gaining air supremacy. Therefore, the accurate classification of different incoming aircraft targets has a great impact on operational decision-making and even affects the trend of the war. According to the characteristics of helicopter, propeller and jet blades, a radar echo model of aircraft target blades is proposed based on the principle of superposition of scattering points. Firstly, an aircraft blade echo model was established based on LFM (Linear Frequency Modulation), and the phase and scattering points of the blade echo signal were analyzed from the angle of blade rotation fretting. Secondly, the echo of aircraft blade is analyzed from three aspects of time domain, frequency domain and time frequency domain, and the characteristics of echo in various aspects are sorted out. Finally, the actual data of aircraft are input for simulation verification, which provides a theoretical basis for aircraft target classification.