Secrecy Performance of Joint Relay and Jammer Selection Methods in Cluster Networks: With and Without Hardware Noises

In this paper, we propose joint relay and jammer selection protocols to enhance secrecy performance for cluster-based multi-hop networks. In particular, without channel state information (CSI) of the eavesdropping links, one of available nodes at each cluster is selected to forward the source data, relying on the CSI of the data links, while a jammer node is randomly chosen to generate artificial noises to an eavesdropper. We also investigate the impact of hardware noises on the secrecy performance of the proposed protocols. When the transceiver hardware is perfect, we derive exact closed-form expressions of secrecy outage probability (SOP) for the proposed protocols over Rayleigh fading channel. We then perform Monte Carlo based computer simulations to verify the theoretical results.