用被动标签增强雷达成像，实现高精度隐私保护室内定位
An Indoor Localization Technique Utilizing Passive Tags and 3-D Microwave Passive Radar Imaging
- 利用环境电磁场与被动标签增强散射信号实现3D成像定位
- 在有限带宽或强反射环境下仍可实现精准定位
- 标签几何差异可区分人物/物体，适合隐私敏感场景
本文提出一种符合隐私保护要求的室内定位方法，基于三维近场（NF）被动雷达成像技术。该技术利用环境中普遍存在的电磁场进行成像，引入被动标签以增强散射场强度，从而在成像层面实现高精度定位。该方法还支持在非理想成像条件下运行，如带宽受限或高反射环境。通过标签的几何特性，可直观区分个体或物体。同时讨论了相关的隐私保护机制，其中标签的频率可变特性提供了额外灵活性，适用于隐私与伦理考量下的多种应用场景。文中展示了多种被动标签设计形式，仿真与实验结果均验证了所提设计的有效性。
原文摘要 · Abstract (English)
A privacy-compliant indoor localization approach utilizing a 3-D near-field (NF) passive radar imaging technique is presented. This technique leverages ubiquitously radiated electromagnetic fields for imaging, with passive tags introduced to enhance the strength of scattering fields, thereby enabling precise localization at the imaging level. The method also supports localization in non-ideal imaging scenarios, such as for limited bandwidth or in highly-reflective environments. Based on their geometrical properties the simple and low-cost passive tags enable intuitive differentiation between individuals or objects. Associated privacy protection mechanisms are discussed, where the frequency-varying properties of the passive tags provide additional flexibility and potential applications under privacy and ethical considerations. Several forms of passive tags are presented, where both simulation and experimental results validate the effectiveness of the proposed passive tag designs.
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