雷达天线空域极化调制机理和新型抗干扰技术研究

Active jamming is the most serious threat to radar,whereas the application of polarization information processing technology provide broad prospect for improving radar anti-jamming performance. However,current radar system in our country are single polarized or has simple polarization switching function, which made them has no polarimetric ability.This brings fundamental difficulty in polarization anti-jamming and target identification.The project based on our previous observation that the polarization state of antenna radiation field is a spatial variable,plan to analysis and build radar antenna spatial polarization model, to disclosure the evolution and changing rule of radar antenna polarization characteristic.Then, study the radar return signal and jamming signal spatial modulation effect and mechanism of antenna scan, design advanced signal processing algorithm, proposing new polarimetric method and anti-jamming method by using antenna inherent property and received sequences while scanning.The research achievement will help discover radar information processing potential, as well as improving anti-interference and target identification ability. Adapt to the weapon equipments development characteristics of our country at present and for a long time in the future, the methods has important reference value.

有源干扰是雷达所面临的最严重的威胁，极化信息处理技术的应用为提升雷达抗干扰性能提供了广阔空间。但是当前我国雷达大多为单极化测量体制或仅有简单的极化切换能力，几乎没有全极化测量能力，这对雷达的极化域抗干扰和目标识别无疑造成了根本性的困难。本项目在我们前期工作观察到天线辐射场的极化状态是一个"空域变量"的基础上，拟分析和建立雷达天线的空域极化模型，揭示雷达天线极化特性在空间的演化规律，进而研究雷达天线在扫描过程中对雷达回波信号、干扰信号的空间调制效应和作用机理，设计先进的信号处理算法，以期探寻利用天线的固有属性和天线扫描观测序列来实现信号极化状态估计和抗干扰的新方法，预期研究成果将有助于进一步发掘雷达信息处理的潜力，对于提升雷达的抗干扰和目标识别能力具有重要的现实意义，符合现阶段乃至未来一段时间内我国武器装备的发展趋势。

有源干扰是雷达所面临的最严重的威胁，极化信息处理技术的应用为提升雷达抗干扰性能提供了广阔空间。但是当前我国雷达大多为单极化测量体制或仅有简单的极化切换能力，几乎没有全极化测量能力，这对雷达的极化域抗干扰和目标识别无疑造成了根本性的困难。本项目的理论基础是天线辐射场的极化状态是一个“空域变量”，分析和建立了雷达天线的空域极化模型，揭示了雷达天线极化特性在空间的演化规律，进而研究了雷达天线在扫描过程中对雷达回波信号、干扰信号的空间调制效应和作用机理，设计了先进的信号处理算法，探索了利用天线的固有属性和天线扫描观测序列来实现信号极化状态估计和抗干扰的新方法，预期研究成果将有助于进一步发掘雷达信息处理的潜力，对于提升雷达的抗干扰和目标识别能力具有重要的现实意义，符合现阶段乃至未来一段时间内我国武器装备的发展趋势。