MTD脉冲压缩雷达干扰对策研究

针对MTD脉压雷达的干扰问题,以LFM信号为例对雷达工作原理给予分析,结合考察现有的干扰产生手段,总结出对该雷达高效干扰的关键在于相干信号获取、样本信号调制、虚假多普勒生成等途径。重点分析了移频和卷积两种重要调制方式,指出其优缺点和应用限制。此外,分析了多普勒调制的必要性和简单调制的合理性,并阐述了多普勒复杂调制的潜在需求。仿真结果证明了其合理性,并给出了MTD脉压雷达原理性干扰公式。

MTD Pulse Compression Radar's Countermeasures

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.