Jamming-Assisted Multi-User Multi-Eavesdropper Broadcast Network: PHY Layer Security Analysis

In this paper, the physical layer security of a multi-user jamming-assisted broadcast network in presence multiple eavesdroppers is investigated. Specifically, base station (BS) broadcasting data to end-users via direct links passive wiretappers, while both legitimate users and use maximal-ratio combining scheme achieve high spatial diversity gain. Furthermore, BS jamming signal that cannot be canceled by increase their decoding failure rates. All are subject Nakagami- $m$ fading models. Relying on upper incomplete moment-generating function combined Signal-to-interference-plus-noise ratio (SINR) at each wiretapper’s MRC output, tight approximate asymptotic expressions for secrecy outage probability (SOP) derived considering two different scenarios, i.e., (i) absence (ii) broadcasted artificial noise. The impact level, severity parameter, number branches examined, most influential parameter system’s retrieved. Numerical results simulations reveal accuracy obtained analytical gain more useful insights into secrecy.