Impact of Nakagami-m Fading Channel on Reconfigurable Intelligent Surface Symbol Error Rate in Non-line-of-sight scenarios

To recent trends, Reconfigurable Intelligent Surfaces (RIS) has gained much attention, which is anticipated to serve the next generation wireless communication system due to enhanced reliability using intelligent low cost surfaces. It is desired to assess this technology under various channel models. In this work we assume a non-line-of-sight (NLOS) path between the base station and the user. We derived the probability of symbol error rate (SER) analysis of RIS-assisted wireless communication system over the Nakagami-m fading channel considering M−ary phase shift keying (MPSK) signalling using a simple moment generating function (MGF)-based approach. To validate the simulated results carried out in MATLAB, theoretical expressions are also derived. In addition, the impact of different parameters, namely, fading parameter value, number of reflecting elements and M−ary signaling on the performance of the RIS-assisted Nakagami-m faded communication system is also investigated. A detailed analysis suggests that the probability of SER highly depends on the above parameters.