用低成本设备实现战场电磁方向定位，实时感知干扰源。
RadAround: A Field-Expedient Direction Finder for Contested IoT Sensing & EM Situational Awareness
- 通过机械转向天线与实时控制软件，实现2维电磁波方向探测。
- 可穿透墙壁识别计算设备，定位法拉第笼的电磁泄漏点。
- 模块化设计适合应急响应、战场监控等实战场景。
本文提出RadAround，一种用于对抗性物联网传感的被动二维方向定位系统，适用于争端环境。系统采用机械转向窄波束天线与现场部署的SCADA软件，利用低成本商用现成组件或3D打印部件生成高分辨率电磁（EM）热图。微控制器可部署的SCADA实时协调天线位置与软件定义无线电（SDR）采样，实现鲁棒的现场操作。其模块化设计支持快速适配多种应用，如灾害救援中的电磁兼容性测试、战场频谱监测、电子入侵检测及战术电磁态势感知（EMSA）。实验表明，RadAround可穿透墙体探测计算设备，评估使用状态，并精确定位法拉第屏蔽舱的电磁干扰泄漏源。
原文摘要 · Abstract (English)
This paper presents RadAround, a passive 2-D direction-finding system designed for adversarial IoT sensing in contested environments. Using mechanically steered narrow-beam antennas and field-deployable SCADA software, it generates high-resolution electromagnetic (EM) heatmaps using low-cost COTS or 3D-printed components. The microcontroller-deployable SCADA coordinates antenna positioning and SDR sampling in real time for resilient, on-site operation. Its modular design enables rapid adaptation for applications such as EMC testing in disaster-response deployments, battlefield spectrum monitoring, electronic intrusion detection, and tactical EM situational awareness (EMSA). Experiments show RadAround detecting computing machinery through walls, assessing utilization, and pinpointing EM interference (EMI) leakage sources from Faraday enclosures.
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