  Fifth generation (5G) mobile networks are expected to play an increasing role
in industrial communication with private mobile communication networks deployed
on company premises. For planning, standardization and product development, it
is crucial to to thoroughly understand the radio channel characteristics of
such environments. Frequencies around 3.7 GHz were already reserved by
regulation authorities and to meet the increasing demand for higher bandwidths,
spectrum in the millimeter wave range around 28 GHz is targeted. This paper
presents a wideband channel measurement campaign at both 3.7 and 28 GHz with
direction-of-arrival information at 28 GHz. The results are compared to the
3GPP TR 38.901 Indoor Factory model and to two other recent papers. Evaluation
of path loss and RMS delay and angle spread show the unique nature of
industrial indoor environments.
