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Wideband Channel Measurements and Temporal-Spatial Analysis for Terahertz Indoor Communications

Terahertz communications are envisioned as a key technology for beyond 5G wireless systems, owing to its unprecedented multi-GHz bandwidth. In this paper, a wideband channel measurement between 130~GHz and 143 GHz is investigated in a typical meeting room for future THz wireless communication access networks. Directional antennas are utilized for resolving the MPCs in the angular domain. With careful system calibration that eliminates system errors and antenna effects, the channel transfer function is developed. Furthermore, ray-tracing techniques are utilized to post-process the measured data. In light of the measurement results, physical parameters and insights in the THz indoor channel are comprehensively analyzed, including the line-of-sight path loss, power-delay-angular profiles, temporal and spatial features, and correlations among THz multipath characteristics.