干扰子空间正交投影快速零陷跟踪波束赋形算法

该文针对LEO星载阵列天线抑制角度动态变化的有源干扰的需要，提出一种干扰子空间正交投影的快速零陷跟踪波束赋形优化算法。算法采用干扰子空间动态更新与迭代正交投影，不断快速修正零陷位置，并通过迭代傅里叶变换(IFT)技术进行优化加速。所提出的快速算法在整个干扰零陷跟踪过程中，具有稳健和精确的控制方向图主瓣赋形区形状和阵元电流激励系数动态范围的能力，同时具备自适应最小化方向图旁瓣电平的能力，适用于星载系统在线实时计算。仿真实验验证了算法的快速性、有效性和稳健性。

Fast Nulls Tracking Pattern Synthesis Based on Jammer Subspace Orthogonal Projection

A fast nulls tracking pattern synthesis algorithm based on jammer subspace orthogonal projection is proposed, which can suppress the dynamic active jamming for LEO spaceborne array antenna. The algorithm corrects the nulls positions of radiation pattern synchronously through dynamically jammer subspace updating and iterative orthogonal projection, while the Iterative Fourier Transform (IFT) technique?is adopted to accelerate the correction. The proposed algorithm can maintain the mainlobe region and control the dynamic range ratio of excitations robustly and precisely, while minimizing the pattern sidelobe adaptively, so it is suitable for online real-time calculation in spaceborne array antenna. Simulation results verify the rapidity, effectiveness, and robustness of the proposed algorithm.