Universal Path Gain Laws for Common Wireless Communication Environments
Universal Path Gain Laws for Common Wireless Communication Environments
复制标题
常见无线通信环境的通用路径增益定律
DOI：
10.1109/tap.2021.3121173
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发表时间：
2021
影响因子：
5.7
通讯作者：
R. Valenzuela
中科院分区：
文献类型：
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作者：
D. Chizhik;Jinfeng Du;R. Valenzuela
路径增益的简单而准确的表达式源自各种常见环境中的电磁基础知识，包括室内视距 (LOS) 和非视距 (NLOS)、城市峡谷、城市/农村宏观、室外-室内以及有植被的郊区街道。渗透到散射区域，有时需要引导的帮助，是不同形态所共有的“普遍”现象。针对大量测量的均方根 (rms) 误差低于 5 dB，比 3GPP 模型高 1-12 dB rms，具体取决于环境。在城市峡谷中，模型的误差为 4.7 dB rms，而数据线性拟合误差为 7.9 dB，LOS/NLOS 3GPP 模型误差为 13.9/17.2 dB。理论路径增益取决于距离，作为幂律，其指数来自一个小集合 {1.5、2、2.5 和 4}，特定于每种形态。这为广泛使用的幂律经验模型提供了理论依据。只需要粗略的环境数据作为参数：街道宽度、建筑物高度、植被深度、墙壁材料和天线高度。
Simple and accurate expressions for path gain are derived from electromagnetic fundamentals in a wide variety of common environments, including line-of-sight (LOS) and non-line-of-sight (NLOS) indoor, urban canyons, urban/rural macro, outdoor–indoor, and suburban streets with vegetation. Penetration into a scattering region, sometimes aided by guiding, is the “universal” phenomenon shared by the diverse morphologies. Root mean square (rms) errors against extensive measurements are under 5 dB, better than 3GPP models by 1–12 dB rms, depending on the environment. In urban canyons the models have 4.7 dB rms error, as compared to 7.9 dB from linear fit to data and 13.9/17.2 dB from LOS/NLOS 3GPP models. The theoretical path gains depend on distance as a power law with exponents from a small set {1.5, 2, 2.5, and 4}, specific to each morphology. This provides a theoretical justification for widely used power-law empirical models. Only coarse environmental data are needed as parameters: street width, building height, vegetation depth, wall material, and antenna heights.