# Directional Wideband Channel Measurements at 28 GHz in an Industrial Environment

## TL;DR

This study conducts detailed 28 GHz channel measurements in an industrial environment, revealing dense multipath and the inadequacy of existing models, thus highlighting the need for industry-specific channel modeling.

## Contribution

It provides the first comprehensive measurement campaign at 28 GHz in an industrial setting, analyzing large scale parameters and proposing the need for new channel models.

## Key findings

- Dense multipath components observed
- Existing models do not fit industrial environments
- Need for industry-specific channel models

## Abstract

With the expected adoption of millimeter wave technologies for industrial communication, it is fundamentally important to properly understand the radio channel characteristics of such environments. This paper presents the setup, scenario and results of a measurement campaign at 28 GHz in a machine hall. The radio channel was measured with a bandwidth of 2 GHz and both large scale parameters and directional information were extracted. Evaluation of the power delay profiles shows that the channel contains dense multipath components. A path loss model is parameterized and blockage losses, RMS delay and angle spreads are evaluated. Comparison with the 3GPP TR 38.901 channel model shows that none of the currently defined scenarios is a fit for industrial settings. This emphasizes the need for a newly defined scenario with an industry specific parameter set.