Performance Analysis of an Amplify-and-Forward Relay-Assisted Communication in the Presence of Double-Rayleigh Fading and Shadowing

Double-Rayleigh (dR) statistical fading channel model has been proved to be capable of capturing specific propagation conditions in urban microcellular communications. The potential application scenarios of such systems include the utilization of the intelligent transportation system infrastructure, e.g., the Roadside Units (RSU) as relay nodes bridging the nearby users with telecom providers. Thus, the specific traits of V2I communications must be assumed. Recently, a novel modification of dR models (i.e., the second order scattering fading model with fluctuating line-of-sight (fSOSF)) was introduced for wireless communications. Thus, the current research presents the performance analysis of a relay-assisted communication system with an Amplify-and-Forward (AF) protocol functioning in the presence of a channel with fading corresponding fSOSF statistical model. The system performance was studied in terms of the outage probability, the channel ergodic capacity, and the average error rate. The presented results of the extensive numerical analysis and simulation demonstrated several specific effects that can be exploited to increase system performance.