A Study of Digital Modulation Schemes over Multi-Cluster Fluctuating Two-Ray Fading Channels for Terahertz Wireless Communication

Terahertz (THz) based communication is currently being explored as a potential solution for achieving high data rate transmission in wireless communication. Understanding the impact of fading channels on THz communication is important because it can help in the design and optimization of THz communication systems. A new family of fading channels called Multi-cluster Fluctuating Two-Ray (MFTR) channel model can be utilized for THz transmission. This fading model is made up of two fluctuating specular components with unpredictable phases and a clustering of scattered waves. The digital modulation schemes are essential for communication channels due to their ability to provide robustness against the effects of fading and high spectral efficiency. In this paper, the performance analysis of modulation schemes and the outage probability over MFTR fading channels are evaluated. The performance metrics are derived using the probability-based approach. A comparison of coherent modulation and the non-coherent modulation over this fading channel are also presented. The derived resulted expressions are plotted and analysed along with the impacts fading parameters over performance of MFTR fading channels. For validation, Monte-Carlo simulation is used.