  Industry 4.0 relies heavily on wireless technologies. Energy efficiency and
device cost have played a significant role in the initial design of such
wireless systems for industry automation. However, high reliability, high
throughput, and low latency are also key for certain sectors such as the
manufacturing industry. In this sense, existing wireless solutions for
industrial settings are limited. Emerging technologies such as millimeter-wave
(mmWave) communication are highly promising to address this bottleneck. Still,
the propagation characteristics at such high frequencies in harsh industrial
settings are not well understood. Related work in this area is limited to
isolated measurements in specific scenarios. In this work, we carry out an
extensive measurement campaign in highly representative industrial
environments. Most importantly, we derive the statistical distributions of the
channel parameters of widely accepted mmWave channel models that fit these
environments. This is a highly valuable contribution, since researchers in this
field can use our empirical model to understand the performance of their mmWave
systems in typical industrial settings. Beyond analyzing and discussing our
insights, with this paper we also shareoour extensive dataset with the research
community.
