舰船电子对抗

由于天基雷达载体平台处于高速运动状态且探测覆盖范围较广，天基雷达接收到的干扰信号角度具有时变性且杂波信号在多普勒域上展宽，直接对天基雷达干扰杂波信号进行空时自适应处理将导致干扰杂波抑制性能下降且有可能导致目标信号损失。针对上述问题，首先基于天基雷达几何关系构建天基雷达多通道回波信号模型，然后详细分析天基雷达干扰杂波信号自由度估计等问题，进一步提出了空域-空时二级处理架构和空时一级处理架构并对比不同架构下干扰杂波抑制性能，最后提出适用于天基雷达的干扰杂波抑制架构。仿真实验证明了该研究内容对天基雷达场景的适用性。

Due to the fact that the space-based radar carrier platform is in a high-speed motion state and has a wide detection range, the angles of the jamming signals received by the space-based radar are time-varying and the clutter signals are broadened in the Doppler domain.Direct space-time adaptive processing to the space based radar will result in a decrease of interference and clutter suppression performance and even the loss of target signals.In order to solve the above problems, this paper firstly constructs a multi-channel echo signal model of space-based radar based on the geometric relationship of space-based radar, then analyzes the problems of estimating the degree of freedom of space-based radar interference clutter signals in detail, further proposes the spatial & space-time secondary processing architecture and the space-time primary processing architecture, compares the suppression performance interference clutter under different architectures, and finally proposes the interference clutter suppression architecture suitable for space-based radar.Simulation experiments validate the applicability of the research content to space-based radar scenarios.