Hyperbolic curve and virtual array combined positioning method and system in low-frequency artificial magnetic field
By combining low-frequency artificial magnetic fields and virtual array technology, the problems of low accuracy and small coverage of indoor positioning technology in complex environments have been solved, achieving high-precision and stable magnetic field positioning, expanding the coverage area and reducing hardware costs.
CN122410440APending Publication Date: 2026-07-17AEROSPACE INFORMATION RES INST CAS
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Patent Information
- Application Number
- CN202610839247.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-11
- Publication Date
- 2026-07-17
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Figure CN122410440A_ABST
Abstract
本发明提供一种低频人工磁场双曲线及虚拟阵列联合定位方法及系统，属于无线与磁定位技术领域，包括：多个低频磁场发射源持续发射频率已知且彼此正交的低频磁场信号，可移动的接收终端进行采样；对每个采样时刻，计算接收终端接收到的来自不同低频磁场发射源信号的相位差，构建双曲线定位方程；提取各低频磁场发射源信号的瞬时相位，利用接收终端移动形成的时空采样特性，将不同时刻的采样数据视为虚拟阵列的各阵元接收数据，通过空间谱估计算法获得波达方向约束信息；将双曲线定位方程与波达方向约束信息相结合，通过联合优化求解接收终端的位置，所述联合优化采用包含距离差匹配项和波达方向约束项的代价函数。本发明实现高精度空间定位。
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