Enhancing Security in Multicasting Employing Generalized Receiver with SC Diversity and Opportunistic Relaying

This paper focuses on a secure wireless multicasting under the employment of generalized receiver along with selection combining (SC) diversity and opportunistic relaying technique. SC diversity technique mitigate the fading effect significantly. Opportunistic relaying gives cooperative gain by selecting the relay with highest signal to noise ratio (SNR) and the generalized receiver is flexible to adaptive signal processing. In this paper the transmitted signal has been protected from eavesdropping by means of the effect of quantity of relay, receive side antenna number, eavesdropper side antenna number, quantity of multicast user and quantity of eavesdropper. In this manner the authors derived the closed form analytical expression for probability of non-zero secrecy multicast capacity (PNSMC) and secure outage probability for multicasting (SOPM) with the consideration that, multiple eavesdroppers are present. These mathematical models are helpful to realize the insight of the effects of aforementioned parameters. The numerical results show that, security in multicast network employing generalized receiver with SC diversity and opportunistic relaying technique is significantly affected by the number of relay, transmit and receive side antenna number, number of multicast user and number of eavesdropper, specially at low noise power region of eavesdropper.