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提出了一种距离向混沌序列移频,方位向余弦调相的SAR欺骗干扰方法。分析了距离向固定移频干扰、随机移频干扰结合方位向调相干扰的特点。为了克服这两种干扰方法的不足,采用基于混沌序列的距离向移频结合方位余弦调相干扰方法,既可以大大增加被干扰方对干扰机位置的侦测难度,又可获得部分的压缩增益,在二维方向上形成占据一定宽度的面域干扰,适用于对分布目标的压制。与传统固定移频,随机移频结合方位向调相干扰结果进行仿真对比,验证了所提方法的优越性。
A method of SAR deception jamming from distance chaotic sequence frequency shift and azimuth cosine phase modulation is proposed. The characteristics of distance-to-fixed frequency-shift interference, random frequency-shift interference and azimuth phase-modulation interference are analyzed. In order to overcome the shortcomings of these two kinds of interference methods, the method of distance-to-frequency shift combined with azimuth phase modulation and phase modulation based on chaotic sequences can not only greatly increase the difficulty of detecting the position of the jammer by the jammer, but also obtain part of the compression gain , In the two-dimensional direction to form a certain width of the domain interference, the distribution of targets for the suppression. Compared with the traditional fixed frequency shift and random frequency shift combined with the azimuth phase modulation interfering results, the superiority of the proposed method is verified.