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Millimeter-wave (mmWave) high-mobility scenarios are deployment scenarios for future wireless communication systems. Measurements in such scenarios cannot be easily repeated, because outdoor environments are hardly controllable. Furthermore, such high-mobility scenarios pose challenges for performance measurements as such measurements are expensive, complex, and time-consuming. Consequently, comparing consecutive measurements in different bands is not straightforward. This paper presents a methodology to ensure a fair comparison between sub 6 GHz and mmWave systems by conducting repeatable, closed-loop, and off-line-processed measurements in a controlled indoor environment. The design is based on a rotating arm, spinning a lightweight transmitter chip with an antenna around a central pivot. Thereby, such high-velocity experiments can be performed at the same channel …