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Radio-propagation measurements and modeling in indoor stairwells at millimeter-wave bands

机译：室内楼梯间毫米波波段的无线电传播测量和建模

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A good understanding of signal wave attenuation along a stairwell is necessary for successful wireless network planning. In this study, the propagation characteristics in indoor multi-floor stairwell environments are examined under the millimeter frequency band. An extensive signal measurement is conducted in two stairwells. These measurements provide information important for ensuring consistent radio transmission of data in such environment, which then enables immediate response during emergency operations. In these measurements, directional horn antennas for co-polarization and cross-polarization in transmitters and receivers are used for different millimeter frequencies (26, 28, 32, and 38 GHz). The feasibility of using the millimeter wave, which is suitable for indoor 5G wireless networks, in two different indoor stairwell environments is investigated. Four different models are employed for path loss investigation. Under single frequencies, the close-in free-space reference distance and floating-intercept path loss models are adopted. For multiple frequencies, the close-in free space reference distance with frequency dependent path loss exponent and alpha-beta-gamma models are applied. The measurements provide data on the received power at multi-floor stairwells through the stair steps, which are useful for path loss study. Accordingly, the path loss exponent values, standard deviations, and other parameters are obtained. (C) 2019 Elsevier B.V. All rights reserved.
机译：要成功进行无线网络规划，必须充分了解沿楼梯间的信号波衰减。在这项研究中，在毫米频段下检查了室内多层楼梯间环境中的传播特性。在两个楼梯间中进行了广泛的信号测量。这些测量提供的信息对于确保在这种环境中数据的一致无线电传输非常重要，从而可以在紧急操作期间立即做出响应。在这些测量中，用于发射器和接收器中的同极化和交叉极化的定向喇叭天线用于不同的毫米波频率（26、28、32和38 GHz）。研究了在两种不同的室内楼梯间环境中使用适用于室内5G无线网络的毫米波的可行性。四种不同的模型用于路径损耗研究。在单频情况下，采用近距离自由空间参考距离和浮动截距路径损耗模型。对于多个频率，使用具有随频率变化的路径损耗指数和alpha-beta-gamma模型的近距离自由空间参考距离。这些测量通过阶梯提供有关多层楼梯间接收功率的数据，这对路径损耗研究很有用。因此，获得了路径损耗指数值，标准偏差和其他参数。 （C）2019 Elsevier B.V.保留所有权利。

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