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In this paper, we study the secrecy performance of a cellular network, where a device-to-device (D2D) communication shares the spectral resources with a multi-antenna base station (BS). By assuming known the channel state information (CSI) of the legitimate user and using the maximal ratio transmission (MRT) at the BS, we first derive a closed-form expression of the ergodic secrecy capacity (ESC)...
We enhance the physical layer security (PLS) of amplify-and-forward (AF) relaying networks with the aid of joint relay and jammer selection (JRJS), despite the deleterious effect of channel state information (CSI) feedback delays. Furthermore, we conceive a new outage-based characterization approach for the JRJS scheme. The traditional best relay selection (TBRS) is also considered as a benchmark...
In this paper, we investigate the physical layer security of multiple-input single-output single-antenna eavesdropper relaying networks with imperfect channel state information. Different from traditional strategies in relay systems, which would halt the communication if the relay could not decode the signal successfully, we propose a robust secure transmission strategy which switches between cooperative...
We investigate the physical layer security in non-regenerative untrusted relay networks, where the relay is a potential eavesdropper despite its cooperatively relaying the information. The current research and development of untrusted relay is often based on the assumption of perfect channel knowledge or the capability of variable-rate transmissions which is decided by instantaneous channel state...
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