关键词: 雷达干扰, MTD, 脉冲压缩, 对策

Abstract:

The working principle of radar is analyzed with LFM signal as an example to address the interference problem of MTD pulse pressure radars.Existing advanced interference means are investigated,from which come the conclusion that the key to efficient radar jamming is coherent signal acquisition,sampled signal's modulation,and false doppler generation.The two important modulation modes of frequency shift and convolution are analyzed with their advantages,disadvantages and application restrictions pointed out.Doppler modulation is analyzed for its necessity and rationality of simple modulation,and the potential demand of complicated doppler modulation is sketched.The simulation results prove its rationality.Finally,MTD pulse compression radar's original reason interference formula is given.

Key words: radar jam;MTD;pulse compression;clue