对调频斜率极性捷变SAR欠采样转发干扰

针对传统欺骗干扰难以对调频斜率极性捷变SAR（chirp rate polarity jittered SAR, CRPJ-SAR）形成有效干扰，研究了对CRPJ-SAR欠采样转发干扰。通过建立CRPJ-SAR有限时长欠采样转发干扰信号模型，分析了欠采样转发干扰对CRPJ-SAR的干扰效果。给出假目标数目、位置以及幅度的理论计算公式。在此基础上讨论了欠采样周期对干扰效果的影响。利用数字仿真验证了理论分析的正确性。

Repeater jamming against chirp rate polarity jittered SAR based on sub-Nyquist sampling

Aim to the limitation of conventional deceptive jamming in the chirp rate polarity jittered SAR (CRPJ-SAR), the sub-Nyquist sampling repeater jamming against CRPJ-SAR is investigated in the paper. The signal model of truncated sub-Nyquist sampling repeater jamming is built, and the features of the jamming in CRPJ-SAR are discussed based on the 2-D imaging output. Analytical formulas to calculate the locations and amplitude of false targets are given and the various jamming effect with different sampling intervals is also addressed. The correctness of theoretical analysis is validated further by simulation experiments.