Modelling and simulation of the complex received signal in wireless communication systems

To address these challenges, the work in this thesis has focused on the modelling of complex received signals, accounting for intricate fading conditions likely to be encountered in emergent applications. This thesis first investigates the influence that line-of-sight (LoS) shadowing has on a complex received signal, which undergoes Rician fading. Therein, the results are used to analyse the performance of systems using phase-based modulation schemes.

This is followed by a study that aims to unify LoS, non-line-of-sight (NLoS), and quasi-line-of-sight (QLoS) propagation states within a single fading model. The fundamental statistics of this novel fading model are explored, including the complex autocorrelation function (ACF). The versatility and validity of the model have been empirically studied using two example use cases.

Aiming to improve the performance of cooperative reconfigurable intelligent surface (RIS) based systems, a new simulation framework is proposed. It combines knowledge of the fading experienced in the wireless channel and a system model for cooperative RIS operation. The utility of the proposed simulation framework is demonstrated through some examples, which are used to provide insights into the influence of spatiotemporal effects on system performance.<br><br><br>