对SAR微动调制干扰效果仿真分析

Simulation and Analysis of Micro Motion Modulation Jamming on SAR

鉴于微动目标成像的特点,引入了一种基于微动调制的SAR新型欺骗干扰样式,建立了信号的理论模型,分析了信号的分布特性,并结合干扰自身特点讨论了分布式干扰的工作模式。在此基础上,从战术运用的角度出发,针对微动干扰样式的特点提出了基于欺骗度的干扰效能评估指标,并结合人工决策模式得到了干扰样式优选的判决条件,该评估方法复杂程度更低,更加易于工程实现。仿真实验结果表明,基于微动调制的干扰样式不仅能够在SAR图像方位向形成虚假目标串,而且通过布站能够对地面高价值军事目标形成有效保护,是一种有效稳健的干扰方法。

Based on characteristics of micro motion target imaging for reference, a new jamming strategy based on micro motion modulation is introduced. Besides, a signal theoretical model is estab- lished, and the distributed jamming working model is analyzed. Then the distributed jamming working model is discussed according to the characteristics of Jamming. On this basis, evaluation index of jamming efficiency is founded on deceptive degree from the perspective of tactics, which is put forward according to the characteristics of micro motion modulation jamming, with a human decision mechanism to get determinant conclusion of optimization choice in several jamming modes. The new evaluation method is simpler and easier to get engineering achievement compared with traditional ones. Simulation results show that the jamming can not only degrade the synthetic aperture radar（SAR） image by producing lots of false targets in the azimuth direction, but also enhance the defense and survival abilities of important targets. The result reveals that the jamming is of high effectiveness and robustness.