极化合成孔径雷达有源干扰的干信比方程

对极化合成孔径雷达(polarimetric synthetic aperture radar, PolSAR)实施有效的电子干扰是合成孔径雷达电子对抗领域的重要课题。针对PolSAR电子干扰的基本原理, 首先推导出了接收机输出端和成像处理后的PolSAR方程, 并与极化散射矩阵联系起来, 完整地描述了不同极化状态组合下的信噪比和杂噪比; 然后构建了PolSAR接收机输出端的干扰方程以及成像处理后的非相干、部分相干和完全相干干扰方程, 总结了PolSAR电子干扰有效功率的能量分配与守恒规律; 最后基于上述方程论证了不同极化配置对PolSAR干扰的效果。对于PolSAR电子干扰技术研究和相关装备研制具有重要的理论指导意义。

Interference signal ratio equation of polarimetric synthetic aperture radar active jamming

Effective electronic jamming on polarimetric synthetic aperture radar (PolSAR) is an important issue in the field of SAR electronic countermeasures. The basic principles of electronic jamming on PolSAR is established in this paper. Firstly, the PolSAR equations at the output of the receiver and after imaging processing are derived, which are connected with the polarimetric scattering matrix to fully describe signal-to-noise ratio (SNR) and clutter-to-noise ratio (CNR) under different combinations of polarization states. Secondly, PolSAR jamming equations at the output of the PolSAR receiver and after imaging processing are constructed for the incoherent, partially coherent and fully coherent jamming. The energy distribution and conservation rules of the effective power of the PolSAR electronic jamming are summarized. Finally, the jamming performances under different polarization configurations are discussed. These research works have important theoretical guiding significance for developing technologies and equipments of electronic jamming on PolSAR.