Coverage Analysis for 3D Terahertz Communication Systems
Coverage Analysis for 3D Terahertz Communication Systems
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DOI：
10.1109/jsac.2021.3071840
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发表时间：
2021-04
影响因子：
16.4
通讯作者：
A. Shafie;Nan Yang;S. Durrani;Xiangyun Zhou;Chong Han;M. Juntti
中科院分区：
文献类型：
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作者：
A. Shafie;Nan Yang;S. Durrani;Xiangyun Zhou;Chong Han;M. Juntti
我们进行新的覆盖概率分析的下行链路传输在三维（3D）太赫兹（THz）通信（THzCom）系统。在这个系统中，我们解决了THz波段的独特传播特性，例如，吸收损耗、超窄的定向波束以及对阻塞的高度脆弱性，这些与较低频率下的那些根本不同。与现有的研究不同，我们在考虑3D定向天线在接入点（AP）和用户设备（UE）的效果，以及由用户本身，移动的人，和墙壁阻挡器在3D环境中造成的阻塞的联合影响的同时表征性能。在这样的考虑下，我们开发了一个易于处理的分析框架，通过检查占主导地位的干扰者（即，这些区域本身可能导致断电），以及这些区域中存在的断电器的平均数量。借助于数值结果，我们验证了我们的分析，并揭示，在分析中忽略太赫兹设备的垂直高度的影响导致覆盖概率大大低估。我们还表明，增加AP处的天线方向性比增加UE处的天线方向性更有价值，以产生更可靠的THzCom系统。
We conduct novel coverage probability analysis of downlink transmission in a three-dimensional (3D) terahertz (THz) communication (THzCom) system. In this system, we address the unique propagation properties in THz band, e.g., absorption loss, super-narrow directional beams, and high vulnerability towards blockage, which are fundamentally different from those at lower frequencies. Different from existing studies, we characterize the performance while considering the effect of 3D directional antennas at both access points (APs) and user equipments (UEs), and the joint impact of the blockage caused by the user itself, moving humans, and wall blockers in a 3D environment. Under such consideration, we develop a tractable analytical framework to derive a new expression for the coverage probability by examining the regions where dominant interferers (i.e., those can cause outage by themselves) can exist, and the average number of interferers existing in these regions. Aided by numerical results, we validate our analysis and reveal that ignoring the impact of the vertical heights of THz devices in the analysis leads to a substantial underestimation of the coverage probability. We also show that it is more worthwhile to increase the antenna directivity at the APs than at the UEs, to produce a more reliable THzCom system.