STBC-Enabled Secure Wireless Transmission With Cooperative Devices Under Imperfect CSI of Destination

In this work, we investigate a practical secure multiple-input single-output (MISO) wireless transmission of information from source to destination assisted by cooperative devices. the first phase, space-time block code (STBC) is employed; thus, does not require any channel state (CSI). second devices are divided into two groups, depending on whether they serve for relaying or jamming. Based imperfect CSI toward destination, allocated relay group assist in forwarding information, whereas those within jamming send artificial noise (AN) so as prevent eavesdropper receiving information. Furthermore, system utilizes grouping strategies, referred random and adaptive. former case role (relaying jamming) each device predetermined randomly, latter it determined autonomously decoding results. We analyze outage probability our proposed with without power allocation optimization under assumption at devices, their accuracy verified Monte-Carlo simulations.