Channel measurements and propagation characterization for indoor terahertz communication

This article presents measurements and simulations of terahertz indoor channels. The measurements are performed in two environments, line-of-sight (LoS) and reflected non-line-of-sight (RNLoS). For the LoS environment, the path loss of different distances and the influence of absorbers are investigated. For the RNLoS environment, different materials are used as reflectors. The time-frequency characteristics of indoor channels are measured by changing the transceiver angle, such as path loss, angle expansion, and power delay profile. And simulations are conducted to verify the measured data. The results show that in the LoS environment, strong multipath caused by the transmitter and receiver electronics is presented. In the RNLoS environment, the path loss is similar to the free-space path loss when the transmit angle is equivalent to the receive angle. Additionally, the results of the simulation show that the path loss changes regularly when the angle between the reflecting surface and the table changes.