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Asilomar Conference on Signals, Systems and Computers (ACSSC)

Physical layer security analysis for cooperative communication with full-duplex relaying under Nakagami-m fading model

Yohannes Jote Tolossa, Giuseppe Thadeu Freitas de Abreu

Published Nov 1, 2016• 2 citations
Publisher

Abstract

We characterised the physical layer security of a three terminal cooperative network with full-duplex relaying under Nakagami-m channel analytically and through simulation. An eavesdropper also coexists within the system at an arbitrary distance from the transmitter. Using secrecy outage probability as a metric to characterise the secrecy performance, integral expression for the corresponding outage probability of the relevant communication link is derived. Furthermore, the secrecy outage probability with half-duplex relay is also analysed. Simulation results show that cooperative communication with FD relay has less secrecy outage even with the presence of residual self-interference than HD relay.

DOI
10.1109/acssc.2016.7869179

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We characterised the physical layer security of a three terminal cooperative network with full-duplex relaying under Nakagami-m channel analytically and through simulation. An eavesdropper also coexists within the system at an arbitrary distance from the transmitter. Using secrecy outage probability as a metric to characterise the secrecy performance, integral expression for the corresponding outage probability of the relevant communication link is derived. Furthermore, the secrecy outage probability with half-duplex relay is also analysed. Simulation results show that cooperative communication with FD relay has less secrecy outage even with the presence of residual self-interference than HD relay.
In this paper we investigate the performance of a cooperative network in the presence of an eavesdropper (Eve). Alice and Bob communicate with the help of a relay, which can operate either in half-duplex (HD) or full-duplex (FD) mode. We account for the self interference at the relay when operating under FD mode. Our analysis focus in the case that the CSI of Eve is not available at Alice. Thus, we derive closed-form expressions for secrecy outage probability. Our results allow us to compare the performance of FD and HD cooperative scenarios under secrecy constraints and, despite the additional interference at the relay, show the advantages of FD relaying over HD. In addition, we also show that a cooperative network is more vulnerable if Eve is closer to Alice than to the relay.
This paper investigates secrecy performance of finite-sized cooperative full-duplex relay (FDR) systems with unreliable wireless backhaul connections across multiple transmitters under Nakagami-m fading. Closed-form expressions for the secrecy outage probability and probability of nonzero achievable secrecy rate are derived in terms of self-interference (SI), transmitter cooperation, and backhaul reliability. It is shown that transmitter cooperation can effectively enhance the secrecy performance, while the asymptotic limits on the secrecy outage probability and probability of nonzero achievable secrecy rate are exclusively determined by backhaul reliability. With the aid of transmitter cooperation, the burden of SI cancelation can be alleviated for the FDR system in achieving the smallest allowed secrecy outage probability. Compared to that of a half-duplex relay (HDR) system, the FDR system achieves a lower secrecy outage probability with well suppressed SI. The analysis shows that the secrecy outage probability achieved by the FDR system converges to that of the HDR system under perfect backhaul as the target secrecy rate becomes small. The secrecy performance metrics of the considered system are verified by simulations for various backhaul scenarios.
This paper investigates the secrecy performance of a full-duplex relaying (FDR) system with a full-duplex (FD) receiver. A novel cooperative jamming protocol is proposed to improve physical layer security, where the FD receiver sends interference to the eavesdropper to degrade its received signal-to-noise ratio when receiving signals from the relay and the source. Taking the residual self-interference (RSI) at both the relay and the FD receiver into consideration, the expressions of secrecy outage probability of the system are derived, where two independent behaviors of the relay toward the jamming signal are considered, 1) the jamming signal from the FD receiver is recognized as an interference at the relay; and 2) the jamming signal is priori known at the relay. Simulation results verified the correctness of the derived expressions and the effectiveness of the proposed protocol. It is demonstrated that the secrecy performance of the system can be significantly enhanced and the gain in terms of the decreased secrecy outage probability becomes more evident in case that the RSI is somewhat low when the proposed protocol is used.
This paper investigates the physical layer security of a full-duplex (FD) Decode-and-Forward (DF) NOMA network assumed to undergo independent and identically distributed Nakagami-m fading. Herein, we provide a secrecy performance analysis for the case of multiple external eavesdroppers in both colluding and non-colluding wiretap scenario. Our analysis introduces novel expressions of the secrecy outage probability (SOP) as well as the strictly positive secrecy capacity (SPSC) for the proposed network. Finally, numerical analysis with simulations are given to illustrate the validity of the obtained theoretical results and to highlight the impact of multiple eavesdroppers on FD NOMA systems.
Considering existing eavesdroppers, this paper analyzes the secrecy outage probability (SOP) of the full-duplex (FD) relaying network with imperfect channel state information (CSI), where the decode-and-forward relay protocol is adopted. To enhance the physical-layer security, two relay selection schemes are proposed. The first scheme uses the maximum-minimum principle to select the optimal relay. The other selection scheme is based on partial signal-to-interference-plus-noise ratio. Then, the tight closed-form approximations of the SOP are obtained for three special CSI cases, respectively. Moreover, based on these approximated results, the effects of some system parameters are analyzed for the SOP of the relay system, including the CSI error, the number of relays, the signal-to-noise ratio (SNR) of the eavesdropper, and the residual self-interference caused by the FD model. The numerical results show that at low SNR of the eavesdropper, residual self-interference has a significantly impact on SOP, while at high SNR of the eavesdropper, this effect is negligible. In addition, the SOP of FD model is always superior to the half-duplex (HD) model when the number of relays changes.
In this letter, the system performance of the DF full-duplex (FD) Relaying communication network is investigated with Physical Layer Security (PLS). In this system model, the source (S) and the destination (D) communicate via a helping relay (R) in the presence of the Eavesdropper (E). From the system model, we derive the closed-form expressions for Intercept Probability (IP) and secrecy outage probability (SOP). For verifying the correctness of the analytical analysis, the Monte Carlo simulation is conducted. In addition, the influence of the main system parameter on the system performance is investigated. Finally, the results show that the analytical and the simulation values agree well with each other.