Measurement-based Analysis and Modeling of Channel Characteristics in an Industrial Scenario at 28 GHz

Millimeter-wave technology is the key technology to support the connection and throughput of the Industrial Internet of Things (IIoT). And the channel model is the basis for the evaluation, optimization, and deployment of the wireless communication system. To model the millimeter-wave channel characteristics in the IIoT scenario, we conduct measurements in a factory-like scenario at 28 GHz. In measurements, antenna heights are set to be higher or lower than most of the metal machines, separately. Based on the collected data, we analyze the large-scale fading and small-scale fading characteristics, including path loss, delay spread (DS), and angular spread (AS). These channel characteristics are statistically modeled. The effects of antenna heights on these channel characteristics are also investigated. Furthermore, we study the distance dependence of the DS and AS.