On the use of massive cylindrical antenna arrays for physical layer security

The need for physical layer security techniques is increasing with the deployments of machine to machine (M2M), internet of things (IoT), and device to device (D2D) communications. An important aspect of physical layer security is to perform covert communications of a possibly unencrypted signal without allowing an eavesdropper to detect the signal. In this paper, cylindrical antenna arrays with a large number of elements are proposed in order to reach this objective. These arrays allow the transmission of both the useful signal to the destination and the jamming signal to the eavesdropper without resorting to the help of other nodes for relaying the signal and/or jamming the eavesdropper. In addition, these arrays can be used at the destination for enhancing the received signal level and/or jamming the eavesdropper simultaneously with the transmitter. Monte Carlo simulation results show that high levels of secrecy capacity can be achieved with the proposed approach.

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