调频斜率极性捷变SAR欠采样转发干扰  

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

作　　者：张静克[1] 代大海[2] 邢世其[1] 庞礴[1] 肖顺平[1] 

机构地区：[1]国防科技大学电子信息系统复杂电磁环境效应国家重点实验室,湖南长沙410073 [2]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2016年第4期96-102,共7页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(61302143;61501473)

摘　　要：针对传统欺骗干扰难以对调频斜率极性捷变SAR形成有效干扰的问题,研究了对调频斜率极性捷变SAR进行欠采样转发干扰的方法。通过建立调频斜率极性捷变SAR有限时长欠采样转发干扰信号模型,分析欠采样转发干扰对调频斜率极性捷变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。Aimed at the limitation of conventional deceptive jamming in the CRPJ-SAR （chirp rate polarity jittered SAR） , the sub-Nyquist sampling repeater jamming against CRPJ-SAR was investigated. The signal model of truncated sub-Nyquist sampling repeater jamming was built and the jamming effect of sub-Nyquist sampling repeater jamming on CRPJ-SAR was analyzed. Analytical formulas to calculate the number, location and amplitude of false targets were given and the various jamming effects with different sampling intervals were also addressed. The correctness of theoretical analysis was validated further by the simulation experiments.

关 键 词：合成孔径雷达 调频斜率极性捷变 欠采样转发干扰 多假目标 

分 类 号：TN95[电子电信—信号与信息处理]