Resource Allocation in THz-based Subcarrier Index Modulation Systems for Mobile Users

Subcarrier Index Modulation (SIM) has recently received a significant research efforts analyzing its different performance aspects. In this paper, performance analysis of SIM over TeraHertz (THz) frequency band is conducted considering mobile users. The mobility model adopted is Random WayPoint (RWP) model with different numbers of mobility dimensions. Moreover, different resource allocation schemes are considered, including fixed, random and distance-aware resource allocation schemes. Closed form expression for the average bit error rate are derived for THz-based SIM considering mobile users and all considered resource allocation schemes. Simulation results with the molecular absorption effect on THz-based system validate the accuracy of the derived mathematical formulas.