Secrecy performance analysis of amplify-and-forward cooperative network with relay selection in the presence of multiple eavesdroppers

The use of wireless transmission networks in various environments has become widespread. One the main challenges is that highly vulnerable to eavesdropping attacks. In this paper, an amplify-and-forward cooperative relaying system with relay selection considered improve physical layer (PHY) security presence multiple eavesdroppers, under two cases, namely, perfect channel state information (CSI) and outdated CSI cases. To evaluate PHY system, we derive closed-form expressions for performance metrics, including probability non-zero secrecy capacity, average outage probability. Then using those expressions, obtain several numerical results parameters. show provides significant improvement system. Moreover, it observed that, when used select best outdated, relatively inferior compared case. Finally, obtained mathematical are also validated Monte-Carlo simulation.