A space vector-based synthetic aperture passive location method and system
By using a passive synthetic aperture localization method based on spatial vectors, a virtual synthetic aperture is formed by platform motion, the main spatial vector is extracted and coherent subspace projection is performed, which solves the problem of insufficient localization accuracy and resolution in existing methods and achieves high-precision, low-complexity radiation source localization.
CN122408744APending Publication Date: 2026-07-17BEIJING INST OF TECH
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-22
- Publication Date
- 2026-07-17
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Figure CN122408744A_ABST
Abstract
本申请公开了一种基于空间矢量的合成孔径无源定位方法及系统，属于无线电侦察与无源定位领域；所述方法包括：单架无人机飞行中被动接收辐射源信号，将慢时间快拍分段并计算样本协方差矩阵，经特征分解提取含目标相位历程的主空间矢量。建立基于斜距与斜视角的极坐标搜索网格，定义沿航迹方向及切向法向单位矢量，精确解算候选网格点三维坐标。结合惯导实测轨迹（含姿态抖动）构建轨迹一致的空间导引矢量，以子空间投影计算主空间矢量在导引矢量上的投影强度，形成后向投影聚焦谱函数。采用由粗到精搜索策略：先大范围稀疏粗搜确定峰值区域，再局部高密度细搜获得辐射源精确位置。本发明通过相干积累实现单平台高精度定位，无需显式运动补偿即可有效抑制平台姿态抖动及导航误差，计算效率高且鲁棒性强。
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