箔条云干扰MTI雷达的频域分析及仿真

摘要

The chaff has been widely used in modern war recently, and the chaff cloud jamming to MTI radar becomes an important subject.The research on time domain, which can not educe the exact results and can not meet the usage in war.From analyzing the frequency domain, the power spectrum of chaff cloud and the frequency spectrum of MTI radar signal are simulated, the frequency response characteristic of single delay line canceler is analyzed, and the results of chaff cloud jamming to MTI radar are simulated.The conclusion shows that, the chaff cloud can effectively interfere MTI radar by expanding chaff frequency spectrum and increasing the chaff density in a certain extent range of time and Doppler frequency.%目前箔条已被广泛地应用于现代化战争中,箔条云对MTI雷达的干扰已成为重要课题.现有的文献从时域进行分析,无法得出准确的结论,不能满足作战运用的需要.从频域进行分析,首先对箔条云功率谱和MTI雷达信号频谱进行了仿真;其次分析了单延迟线相消器的频率响应特性,并仿真了箔条云对MTI雷达的干扰效果;最后通过实例得出结论,在一定的时间和多普勒频率范围内,展宽箔条频谱和增加箔条密度,可以有效干扰MTI雷达.