Indoor Wireless Channel Properties at Millimeter Wave and Sub-Terahertz Frequencies
Indoor Wireless Channel Properties at Millimeter Wave and Sub-Terahertz Frequencies
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DOI：
10.1109/globecom38437.2019.9013236
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发表时间：
2019-08
期刊：
影响因子：
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通讯作者：
Yunchou Xing;Ojas Kanhere;Shihao Ju;T. Rappaport
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文献类型：
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作者：
Yunchou Xing;Ojas Kanhere;Shihao Ju;T. Rappaport
本文提供了室内反射、散射、传输和大尺度路径损耗的测量和模型，描述了毫米波和太赫兹频率下的主要传播机制。使用带可旋转窄波束喇叭天线的基于宽带滑动相关的信道探测系统，仔细研究了普通建筑材料（干墙和透明玻璃）在28,73和140 GHz下的信道特性。反射系数随着入射角的增加而线性增加，并且在给定的入射角下，随着频率的增加，可以观察到更低的反射损耗（例如，更强的反射）。尽管来自干墙的反向散射存在于28ghz、73 GHz和140 GHz，但光滑表面（如干墙）被显示为一个简单的反射表面，因为在测量的频率和角度范围内，散射功率比反射功率低20db或更多。隔板损耗随频率增加而增加，但损耗的大小取决于材料。透明玻璃和干墙都显示出诱发去极化效应，这种效应随着频率的增加而变得更加突出。提供了140 GHz的室内传播测量和大规模室内路径损耗模型，揭示了与28 GHz和73 GHz相似的路径损耗指数和阴影衰落。本文中的测量和模型可用于未来的无线系统设计和建筑物内频率超过100 GHz的其他应用。
This paper provides indoor reflection, scattering, transmission, and large-scale path loss measurements and models, which describe the main propagation mechanisms at millimeter wave and Terahertz frequencies. Channel properties for common building materials (drywall and clear glass) are carefully studied at 28, 73, and 140 GHz using a wideband sliding correlation based channel sounder system with rotatable narrow-beam horn antennas. Reflection coefficient is shown to linearly increase as the incident angle increases, and lower reflection loss (e.g., stronger reflections) are observed as frequencies increase for a given incident angle. Although backscatter from drywall is present at 28, 73, and 140 GHz, smooth surfaces (like drywall) are shown to be modeled as a simple reflected surface, since the scattered power is 20 dB or more below the reflected power over the measured range of frequency and angles. Partition loss tends to increase with frequency, but the amount of loss is material dependent. Both clear glass and drywall are shown to induce a depolarizing effect, which becomes more prominent as frequency increases. Indoor propagation measurements and large-scale indoor path loss models at 140 GHz are provided, revealing similar path loss exponent and shadow fading as observed at 28 and 73 GHz. The measurements and models in this paper can be used for future wireless system design and other applications within buildings for frequencies above 100 GHz.