Wireless vehicular communications and sensing technologies are key to enabling more advanced intelligent transportation systems (ITSs) with improved safety and efficiency. Within the realm of wireless communication, millimeter-wave (mmwave) technology has recently received much attention, providing rich spectrum resources to support the timely transmission of large amounts of data. This is especially important for vehicular applications because the number of sensors on modern vehicles is rapidly increasing and thus generating large amounts of data. To fully exploit this potential, understanding mm-wave vehicle-to-vehicle (V2V) propagation channels is crucial. In this article, we review the state of the art in mm-wave V2V channel measurements and modeling, describe recent directional V2V channel measurements performed in the 60-GHz band, and discuss future challenges to be addressed in mm-wave V2V channel measurements and modeling.

中文翻译：

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5G毫米波车对车通信传播信道：最新进展与未来挑战

无线车载通信和传感技术是实现更先进的智能交通系统 (ITS) 并提高安全性和效率的关键。在无线通信领域，毫米波（mmwave）技术最近备受关注，它提供了丰富的频谱资源来支持海量数据的及时传输。这对于车辆应用尤其重要，因为现代车辆上的传感器数量正在迅速增加，从而产生大量数据。为了充分发挥这一潜力，了解毫米波车对车 (V2V) 传播渠道至关重要。在本文中，我们回顾了毫米波 V2V 通道测量和建模的最新技术，描述了最近在 60 GHz 频段中执行的定向 V2V 通道测量，