Millimeter wave (mmWave) bands have been utilized for the fifth generation (5G) communication systems and will no doubt continue to be deployed for beyond 5G (B5G). However, the underlying channels are not fully investigated at multi-frequency bands and in multi-scenarios by using the same channel sounder, especially for the outdoor, multiple-input multiple-output (MIMO), and vehicle-to-vehicle (V2V) conditions. In this paper, we conduct multi-frequency multi-scenario mmWave MIMO channel measurements with $4\times 4$ antennas at 28, 32, and 39 GHz bands for three cases, i.e., the human body and vehicle blockage measurements, outdoor path loss measurements, and V2V measurements. The channel characteristics, including blockage effect, path loss and coverage range, and non-stationarity and spatial consistency, are thoroughly studied. The blockage model, path loss model, and time-varying channel model are proposed for mmWave MIMO channels. The channel measurement and modeling results will be of great importance for further mmWave communication system deployments in indoor hotspot, outdoor, and vehicular network scenarios for B5G.

中文翻译：

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B5G 无线通信系统的多频多场景毫米波 MIMO 信道测量和建模

毫米波 (mmWave) 频段已被用于第五代 (5G) 通信系统，并且毫无疑问将继续部署到 5G (B5G) 以上。然而，并没有通过使用相同的信道探测仪在多频段和多场景下充分研究底层信道，特别是对于室外、多输入多输出 (MIMO) 和车对车 (V2V)使适应。在本文中，我们使用 $4\times 4$ 天线在 28、32 和 39 GHz 频段对三种情况进行多频多场景毫米波 MIMO 信道测量，即人体和车辆阻塞测量、室外路径损耗测量和 V2V 测量。彻底研究了信道特性，包括阻塞效应、路径损耗和覆盖范围，以及非平稳性和空间一致性。针对毫米波 MIMO 信道提出了阻塞模型、路径损耗模型和时变信道模型。信道测量和建模结果对于进一步在 B5G 的室内热点、室外和车载网络场景中部署毫米波通信系统具有重要意义。