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Lecture notes in electrical engineering

Ergodic Secrecy Capacity Analysis Over Composite Weibull/Inverse Gamma Fading Channel

Vipin Kumar Upaddhyay, Puspraj Singh Chauhan, Sanjay Kumar Soni

Published Sep 3, 2022• 0 citations
Publisher
DOI
10.1007/978-981-19-0312-0_49

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IEEE Access•Jan 1, 2021•4 citations
The confidentiality of wireless multicast network is notably compromised by the concurrent existence of shadowing and fading. To overcome this security threat, mathematical modeling of a multicast scenario is proposed in this paper over κ-μ/ inverse gamma (IG) composite fading channel where transmitted confidential information from source is under malicious attack of multiple eavesdroppers. The well-known physical layer security approach is adopted to analyze the impact of system parameters on secrecy performance in terms of novel expressions of secure outage probability for multicasting, probability of nonzero secrecy multicast capacity and ergodic secrecy multicast capacity. The generalization of security analysis is achieved by demonstrating Rayleigh, Rician, Nakagami-m, κ-μ fading and Gaussian channels as a special scenarios of κ-μ/IG distribution. At the end, analytical results are justified by performing Monte-Carlo Simulations.
In this paper, we consider the transmission of confidential message through Weibull fading single-input single-output (SISO) channel in the presence of multiple eavesdroppers. At first, we define perfect secrecy capacity in terms of secure outage probability and provide a complete characterization of the maximum transmission rate at which the eavesdroppers are unable to decode any information. Then, we find the average secrecy capacity for multicasting in the presence of multiple eavesdroppers. Finally, we find the closed-form expression for the secure outage probability to investigate the secure outage performance of Weibull fading SISO channel in the presence of multiple eavesdroppers and simulated ergodic secrecy multicast capacity for different fading parameters to observe the effect of diversity on the fading parameter.
The secrecy performance of realistic wireless multicast scenarios can be significantly deteriorated by the simultaneous occurrence of multipath and shadowing. To resolve this security threat, in this work an opportunistic relaying-based dual-hop wireless multicast framework is proposed in which the source dispatches confidential information to a bunch of receivers via intermediate relays under the wiretapping attempts of multiple eavesdroppers. Two scenarios, i.e. non-line of sight (NLOS) and line of sight (LOS) communications along with the multiplicative and LOS shadowing are considered where the first scenario assumes η - μ and η - μ/inverse Gamma (IG) composite fading channels and the latter one follows κ - μ and κ - μ/IG composite fading channels as the source to relay and relay to receiver’s as well as eavesdropper’s links, respectively. Secrecy analysis is accomplished by deriving closed-form expressions of three familiar secrecy measures i.e. secure outage probability for multicasting, probability of non-zero secrecy multicast capacity, and ergodic secrecy multicast capacity. We further capitalize on those expressions to observe the effects of all system parameters which are again corroborated via Monte-Carlo simulations. Our observations indicate that a secrecy tradeoff between the number of relays and number of receivers, eavesdroppers, and shadowing parameters can be established to maintain the admissible security level by decreasing the detrimental influences of fading, shadowing, the number of multicast receivers and eavesdroppers.