Impact of Blockers on User Equipment Angular Diversity in THz Microcellular Scenarios
Impact of Blockers on User Equipment Angular Diversity in THz Microcellular Scenarios
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DOI：
10.1109/icc45041.2023.10279799
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发表时间：
2023-05
期刊：
影响因子：
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通讯作者：
Jorge Gómez-Ponce;Naveed A. Abbasi;S. Abu-Surra;Gary Xu;Charlie Zhang;A. Molisch
中科院分区：
文献类型：
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作者：
Jorge Gómez-Ponce;Naveed A. Abbasi;S. Abu-Surra;Gary Xu;Charlie Zhang;A. Molisch
太赫兹（THz）频段大带宽的可用性将成为下一代无线通信系统中高数据速率应用的关键推动因素。城市微蜂窝场景是一种重要的部署场景，其中基站（BS）显著高于用户设备（UE）。在实际运行条件下，移动物体（即障碍物）会间歇性地遮挡基站 - 用户设备链路的不同部分。因此，在本文中，我们分析此类障碍物的影响。我们假设最强波束对被遮挡，并研究角度分集的可用性和程度，即在最强波束被遮挡时能够维持通信的替代波束对。该分析采用了城市微蜂窝场景下145 - 146 GHz频段的双向信道测量，基站与用户设备的距离在18至83米之间。我们将波束分集和容量等通信系统参数与无线传播条件联系起来。我们表明，遮挡导致的信噪比损失取决于被遮挡的角度范围和具体位置，并且我们发现，在视距（LOS）情况下，平均遮挡损失约为10 - 20分贝，在非视距（NLOS）情况下约为5 - 12分贝。该分析有助于设计智能算法或设备（如波束成形、智能反射面）以克服遮挡的影响。
The availability of large bandwidths in the terahertz (THz) band will be a crucial enabler of high data rate applications in next-generation wireless communication systems. The urban microcellular scenario is an essential deployment scenario where the base station (BS) is significantly higher than the user equipment (UE). Under practical operating conditions, moving objects (i.e., blockers) can intermittently obstruct various parts of the BS- UE link. Therefore, in the current paper, we analyze the effect of such blockers. We assume a blockage of the strongest beam pair and investigate the availability and extent of angular diversity, i.e., alternative beampairs that can sustain communication when the strongest is blocked. The analysis uses double-directional channel measurements in urban microcellular scenarios for 145– 146 GHz with BS-UE distances between 18 to 83 m. We relate the communication-system quantities of beam diversity and capacity to the wireless propagation conditions. We show that the SNR loss due to blockage depends on the blocked angular range and the specific location, and we find mean blockage loss to be on the order of 10–20 dB in line-of-sight (LOS) and 5–12 dB in NLOS (non-LOS). This analysis can contribute to the design of intelligent algorithms or devices (e.g., beamforming, intelligent reflective surfaces) to overcome the impact of the blockage.