0.3 THz Channel Measurement and Analysis in an L-shaped Indoor Hallway
Yiqin Wang, Yuanbo Li, Yi Chen, Ziming Yu, Chong Han
Abstract
The TeraHertz (THz) band (0.1-10 THz), which supports terabit-per-second (Tbps) data rates, has been envisioned as one of the promising spectrum bands for ultra-broadband sixth-generation (6G) communications. In this paper, an angular-resolvable ultra-wideband channel measurement campaign in an indoor L-shaped hallway at 306-321 GHz is presented, by using a frequency-domain vector network analyzer (VNA)-based channel sounder. In particular, four points in the line-of-sight (LoS) case and nine points in the non-line-of-sight (NLoS) case are measured, with a directional antenna equipped at the receiver (Rx) side to resolve multi-path components (MPCs) in the angular domain. The multi-path propagation in the L-shaped hallway in the THz band is elaborated in terms of power delay angular profiles (PDAPs), based on the multi-path component distance (MCD)-based Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm. Indoor THz channel characteristics are analyzed in depth. Specifically, the path loss exponents (PLEs) of the LoS case are 1.7222 for the best direction and 1.3910 for the omni-directional path losses. Moreover, in the LoS case, the average logarithmic values of root-mean-square (RMS) delay spread (DS) and azimuth spread of angle (ASA) are -7.7464 and 1.52, while the NLoS case yields larger average RMS DS and ASA of -7.5501 and 1.68, respectively. Besides, the cluster delay difference follows an exponential distribution, for which the average values of cluster delay difference are 37.15 ns in the LoS and 22.59 ns in the NLoS case.