Security Analysis in Multicast Networks over Generalized Gamma Fading Channels Operating Dual-Branch Diversity Receiver

In this paper, a single input multiple output (SIMO) multicasting network scheme is proposed over generalized gamma fading channels with dual-branch diversity receivers in the presence of multiple eavesdroppers. The main goal of this paper is to analyze the effects of shaping parameters $\omega$ and $\beta$ with a number of $\theta$ receivers and $\phi$ eavesdroppers on the secrecy performance of the proposed scheme. The closed-form analytical expressions of the probability of non-zero secrecy multicast capacity (PNZSMC) and the secure outage probability for multicasting (SOPM) have been derived and verified via the monte carlo simulation. Our results revealed that the secrecy performance degrades with increasing in the shaping parameters related to eavesdropper and upgrades with increasing in the main channel shaping parameter. Secrecy performance is also greatly affected by the number of receivers and eavesdroppers. Increasing in the number of receivers and eavesdroppers, the secrecy performance degrades.

I. Introduction

Wireless communication plays a vital role in our daily lives, but it encounters challenges like signal degradation caused by factors such as fading, attenuation, multipath propagation, and environmental influences. To overcome these challenges and improve the quality of wireless communication, diversity techniques have been widely employed. One popular method is the dual-branch diversity receiver, which utilizes two antennas to receive the same signal and combines them to enhance the signal quality [1]. The statistical characteristics of wireless channels can be accurately modeled using the flexible Generalized Gamma distribution.