Scattering from Rough Surfaces in 100+ GHz Wireless Mobile Networks: From Theory to Experiments

Scattering from Rough Surfaces in 100+ GHz Wireless Mobile Networks: From Theory to Experiments
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100 GHz 无线移动网络中粗糙表面的散射:从理论到实验

DOI:
10.1145/3570361.3613306
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发表时间:
2023
期刊:
ACM
影响因子:
--
通讯作者:
Ghasempour, Yasaman
Ghasempour, Yasaman
中科院分区:
--
文献类型:
--
作者:
Shen, Ruiyi;Ghasempour, Yasaman

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由于大量的可用带宽,100 GHz以上频率的使用受到越来越多的关注。鉴于信号阻塞的可能性很高,反射路径在100+ GHz网络中起着关键作用。有趣的是,在这些频率下,信号波长变得与常见自然表面中的高度扰动相当。因此,反射图案偏离镜面般的平滑反射,并表现出由非镜面分量组成的粗糙散射图案。本文提出了一个深入的分析和实验演示的“粗糙”表面散射及其影响的无线网络,即在覆盖范围,移动性的弹性,和信道互易性。此外,我们提出了一个新的框架,估计从反射光谱中看到的独特的光谱和空间签名的表面粗糙度水平。我们进行广泛的建模,仿真,并在空中实验使用宽带亚太赫兹无线系统采用典型的室内/室外表面,如瓷砖,砖,红石,花岗岩。
The use of frequencies above 100 GHz has received increasing attention due to the large amount of available bandwidth. Given the high chance of signal blockage, reflected paths play a key role in 100+ GHz networks. Interestingly, at these frequencies, the signal wavelength becomes comparable to the height perturbation in common natural surfaces. Hence, the reflection pattern deviates from mirror-like smooth reflection and exhibits rough scattering patterns that consist of non-specular components. This paper presents an in-depth analysis and experimental demonstration of "rough" surface scattering and its implications for wireless networking, namely in coverage, mobility resilience, and channel reciprocity. Furthermore, we present a novel framework for estimating the surface roughness level from the unique spectral and spatial signatures seen in the reflection spectra. We perform extensive modeling, simulation, and over-the-air experiments using a broadband sub-THz wireless system employing typical indoor/outdoor surfaces such as tile, brick, redstone, and granite.
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