A novel low-cost channel sounder for double-directionally resolved measurements in the mmWave band

With the move towards 6G and associated tech-
nology deployment in higher frequency bands, measurements
of directionally-resolved channels and sounders capable of per-
forming such measurements are a necessity. In this paper, we
present a new concept of channel sounding based on a Redirecting
Rotating Mirror Arrangement (ReRoMA), capable of performing
double-directional channel measurements at millimeter wave
frequencies by mechanical beam steering orders of magnitude
faster than existing rotating-horn arrangements. We present this
new concept, describe a prototype operating at 60 GHz, and use it
to perform, as proof-of-principle, a dynamic cart-to-cart channel
measurements at a T-intersection scenario. We show that this
sounding principle works and allows the directional evaluation
of the channel. We visualize the different resolvable propagation
paths in terms of dynamic angular and delay power spectrum,
and relate them to the environmental geometry.