The Effect of Human Blockage on The Performance of RIS aided Sub-THz Communication System

5G and beyond networks have been the main focus of wireless communication society nowadays. One candidate of these networks is the usage of sub-terahertz (sub-THz) band. However, it suffers badly due to blockage whether it causes by objects or human bodies. Reflecting intelligent surfaces (RISs) is used to eliminate the effect of blockage by implementing it as an assistant to sub-THz access points (APs). In which, RISs can provide alternative line of sight (LOS) links between transmitter (TX) and receiver (RX), when the main TX-RX link is blocked. By optimal placement of RISs, they succussed in solving blockage due to static objects. But, human bodies blockage, which cannot be known and is difficult to be predicted, is still under question to model its effect on the system. In this paper, the effect of human blockage is studied under realistic scenarios in 150 THz band, where the link blockage is assumed to occur for both the direct (LOS) TX-RX link and the alternative TX-RIS-RX links. Furthermore, a trustable human blockage model, Geometrical Empirical model, is considered to describe human obstacles. In addition, we present the effect of RX height on the blockage occurrence. In our simulation results, we study the impact of blockage on the performance of RIS aided sub-THz communication system in terms of the spectral efficiency and outage probability.