Performance Analysis of Mixed Beaulieu‐Xie and M Dual‐Hop Amplify‐and‐Forward Relay Systems
Jiashun Hu, Yuexiang Wu, Weiqiang Wu, Sunan Wang · IET Communications · 2025
ABSTRACT This work presents a comprehensive study on the performance of an asymmetric dual‐hop radio frequency (RF)/free‐space optical (FSO) transmission system that utilizes a fixed gain amplify‐and‐forward protocol. The RF path is characterized by the Beaulieu–Xie model, and the FSO link is affected by Málaga () turbulence in the presence of pointing errors. In this study, we introduce novel and precise analytical expressions for the probability density function, the cumulative distribution function (CDF), and the moment generating function (MGF) of the overall signal‐to‐noise ratio (SNR). Using the derived expressions, we proceed to obtain accurate infinite series representations for the outage probability (OP), the average bit‐error rate (BER), and the ergodic capacity (EC). In addition, we conduct asymptotic analysis for the CDF, the MGF, the OP, the average BER, and the EC in the high SNR regime. Numerical results are compared with the Monte Carlo simulations to validate the accuracy of these derived expressions.