对调频连续波SAR部分接收式噪声调制干扰

调频连续波合成孔径雷达（FMCW SAR）作为成像雷达小型化产物，其结构简单、成像分辨率高、系统隐蔽性强，需要对其进行快速有效的干扰。本文提出了一种对FMCW SAR部分接收式噪声调制干扰方法，将信号时域与噪声频域进行乘积调制，能够生成范围可控的灵巧压制区。同时截获信号采用部分接收的方式处理，并将部分接收信号通过多次移频补偿与首尾衔接以模拟完整周期截获信号，避免了对FMCW大时宽带宽信号采样时带来的数据庞大问题，降低信号带宽、减小采样数据与调制运算量。另外，部分接收使得干扰出现旁瓣扩散现象，将会分散主要压制区的部分能量。本文方法通过仿真验证了可行性，其能够降低算法复杂度与硬件压力，并通过改变噪声模板时宽实现对压制区范围的灵巧控制，故具有工程可行性。 

Partial Receiving Noise Modulation Jamming Against FMCW SAR

? ?As a product of miniaturized imaging radar， frequency modulated continuous wave synthetic aperture radar （FMCW SAR） has the advantages of simple structure， high imaging resolution and strong system concealment. It needs to be jammed quickly and effectively. In this paper， a partial receiving noise modulation jamming method for FMCW SAR is proposed. The signal time domain is multiplied by the frequency domain of noise template， which can generate a smart suppression area with controllable range. At the same time， the intercepted signal is processed by partial reception， and connect part of the received signal with the head and tail after multiple frequency shift compensation to simulate the full cycle intercepted signal， which avoids the huge data problem caused by sampling FMCW wide-band signal， reduces the signal bandwidth， amount of sampling data and modulation operations. In addition， partial receiving causes sidelobe diffusion of interference， which will disperse part of the energy of the main suppression area. The feasibility of this method is verified by simulation. It can reduce the algorithm complexity and hardware pressure， and realize the smart control of suppression area by changing the time width of the noise template， so it has engineering feasibility.