Second Order Statistics of Sub-THz Communications and Sensing Channels

We present a ray-tracing-based study on the second-order statistics of sub-THz indoor channels in an industrial environment. The accuracy of the ray-tracing tool has been validated through several extensive measurement campaigns. We report Root mean square (RMS) delay spreads ranging from 8 ns to 55 ns and the correlation bandwidth (BW) span from 20 MHz to 120 MHz. Also, we investigate an Integrated Sensing and Communication (ISAC) scenario, where we separately evaluate the path loss of Multipath Components (MPCs) interacting with the sensed target and those that do not. We show separate statistics for Line-of-sight (LOS) and Non-line-of-sight (NLOS) channels, compare directive and omni-directional antenna setups and consider two different clutter densities within the scene as defined by 3GPP. The generated channel statistics can serve as a baseline for analytical and simulation-based performance evaluation of THz communications systems in industrial settings.