Through-wall mapping is an emerging field of research with promising applications varying from search and rescue, to health care and to security. Radar is a valuable tool in this process, mainly due to its long wavelength, which can pass through construction materials. However, this capability comes at a price, namely multipath reflections caused by the environment, which can reduce the usability of the produced map considerably. This paper proposes methods to detect and isolate these multipath reflections, eventually leaving out a usable map of the enclosed environment. For this purpose, two different radars, one operating at 24GHz and the other at 76GHz, were evaluated in various wall configurations constructed inside an enclosed space using portable wall segments. The testing arena was probed from the outside with the radars mounted on the top of a differential drive mobile robot. The paper shows that the proposed methods are effective in eliminating multipath reflections and in building an accurate representation of the environment using the radars.

中文翻译：

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使用雷达进行穿墙映射：处理多径反射的方法

穿墙贴图是一个新兴的研究领域，其有希望的应用包括搜索和救援，医疗保健和安全。雷达在此过程中是一种有价值的工具，主要是因为它的波长长，可以穿过建筑材料。但是，此功能需要付出一定的代价，即环境造成的多路径反射，这会大大降低生成的地图的可用性。本文提出了检测和隔离这些多径反射的方法，最终遗漏了封闭环境的可用图。为此，使用便携式墙段在封闭空间内构造的各种墙配置中评估了两种不同的雷达，一种工作在24GHz，另一种工作在76GHz。测试场是从外部探测的，雷达安装在差速驱动移动机器人的顶部。本文表明，所提出的方法在消除多径反射和使用雷达建立环境的精确表示方面是有效的。