RoS: passive smart surface for roadside-to-vehicle communication
RoS: passive smart surface for roadside-to-vehicle communication
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DOI：
10.1145/3452296.3472896
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发表时间：
2021-08
期刊：
影响因子：
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通讯作者：
John Nolan;Kun Qian;Xinyu Zhang
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文献类型：
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作者：
John Nolan;Kun Qian;Xinyu Zhang
现代自动驾驶汽车通常配备有雷达，用于全天候感知。然而，雷达的功能仅限于识别环境中反射器的位置。在本文中，我们研究了智能交通基础设施的可行性，以向汽车雷达传递更丰富的信息。我们提出了RoS，这是一种被动的PCB制造的智能表面，可以重新配置以嵌入数字位，并通知雷达，就像视觉路标对摄像头一样。我们将RoS标牌设计为反向反射器，可以将信号从宽视角反射回雷达。我们进一步介绍了一种空间编码方案，该方案基于回射元件的几何布局在反射的模拟信号中搭载信息。我们的原型制作和实验验证了RoS作为射频“条形码”的有效性，在实际的运输环境中可以被雷达读取。
Modern autonomous vehicles are commonly instrumented with radars for all-weather perception. Yet the radar functionality is limited to identifying the positions of reflectors in the environment. In this paper, we investigate the feasibility of smartening transportation infrastructure for the purpose of conveying richer information to automotive radars. We propose RoS, a passive PCB-fabricated smart surface which can be reconfigured to embed digital bits, and inform the radar much like visual road signs do to cameras. We design the RoS signage to act as a retrodirective reflector which can reflect signals back to the radar from wide viewing angles. We further introduce a spatial encoding scheme, which piggybacks information in the reflected analog signals based on the geometrical layout of the retroreflective elements. Our prototype fabrication and experimentation verifies the effectiveness of RoS as an RF ''barcode'' which is readable by radar in practical transportation environment.