300 GHz Dual-Band Channel Measurement, Analysis and Modeling in L-Shaped Scenarios

The Terahertz (THz) band (0.1–10 THz) has been envisioned as one of the promising spectrum bands for sixth-generation (6 G) and beyond communications. In this paper, THz channel measurement, simulation, and modeling for the generalized L-shaped intersection scenario are conducted. First, a dual-band angular-resolvable wideband channel measurement in an L-shaped hallway is presented and THz channel characteristics at 306-321 GHz and 356-371 GHz are analyzed. Then, a generic L-shaped intersection scenario model is developed, by adapting the ray-tracing (RT)-statistical hybrid channel modeling method THz channel characteristics in the L-shaped scenario. Especially, the spatial consistency of reflected multi-path components (MPCs) in the non-line-of-sight (NLoS) region is analyzed, and the continuous change of dominant MPCs is statistically modeled, in terms of their power, delay and angles of arrival. As a result, the proposed hybrid approach reduces the computational cost by reducing the determination of dominant MPCs in the NLoS region of the L-shaped scenario. Besides, as conventional close-in and alpha-beta path loss models cannot take good care of large-scale fading in the NLoS case, a modified alpha-beta (M-AB) path loss model for the NLoS region of L-shaped scenarios is proposed and verified 80% more accurate for L-shaped scenarios at different frequency bands.