随机线性调频斜率SAR抗欺骗干扰方法研究

随机线性调频斜率合成孔径雷达(RLFMR-SAR)系统利用目标回波信号与干扰信号之间存在的失配,通过目标回波匹配压缩、一维压缩干扰陷波、二维压缩干扰陷波等方法对抗欺骗干扰。提出了调频斜率变化系数和失配干扰抑制比指标,给出了三种抗干扰方法的算法流程、使用条件及影响抗干扰性能的因素。通过计算机仿真对三种方法的抗干扰能力进行了定量分析,仿真结果与理论分析相符。

Study of countermeasures to deceptive jamming using random linear modulation frequency ratio SAR

The random linear frequency modulated ratio synthetic aperture radar(RLFMR-SAR) uses the mismatch between the target echoes and the jamming signals to counter deceptive jamming by applying the matched compression of target returns and jamming trap to 1-D or 2-D compressed signals.The LFM slope coefficient and matched suppression ratio are defined,the block diagrams are given for three methods.The conditions for application and the factors influencing the performance are also studied.Quantitative analysis is made through computer simulation to the performance of the three techniques,with results consistent with theoretic analysis.