Physical Layer Security in a Hybrid TPSR Two-Way Half-Duplex Relaying Network over a Rayleigh Fading Channel: Outage and Intercept Probability Analysis

Ngo Hoang An,Tan N Nguyen,Minh Tran,Duy-Hung Ha

doi:10.3390/electronics9030428

Ngo Hoang An, Tan N Nguyen + Show 2 more

Open Access

https://doi.org/10.3390/electronics9030428

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Abstract

In this paper, the system performance of a hybrid time–power splitting relaying (TPSR) two-way half-duplex (HD) relaying network over a Rayleigh fading channel is investigated in terms of the outage probability (OP) and intercept probability (IP). The proposed model has two sources, A and B, which communicate with each other with the help of an intermediate relay (R) under the presence of an eavesdropper (E). The physical layer security (PLS) was considered in this case. Firstly, we derived the closed-form expressions of the exact and asymptotic IP in two cases, using MRC (maximal ratio combining) and SC (selection combining) techniques. The closed-form expressions of the system OP was then analyzed and derived. All the analytical expressions of the OP and IP of the system model were verified by a Monte Carlo simulation in connection with all the main system parameters. In the research results, the analytical and simulation values were in total agreement, demonstrating the correctness of the system performance analysis.

Highlights

When energy harvesting (EH) from green environmental sources is considered, radio frequency (RF) signals can be seen as potential electrical sources for cooperative network devices
A Monte Carlo simulation was conducted to validate the correctness of the system performance
A Monte Carlo simulation was conducted to validate the correctness of the system performance analysis in terms of the derived intercept probability (IP) and Outage Probability (OP) expressions [36,37,38,39,40,41,42,43,44,45,46,47,48]

Summary

Introduction

When energy harvesting (EH) from green environmental sources is considered, radio frequency (RF) signals can be seen as potential electrical sources for cooperative network devices. The secure cooperative transmissions in a dual-hop MIMO relay system (using a combined transmit antenna selection and a maximal-ratio combining scheme over the Nakagami-m fading channels, with an adaptive decode-and-forward relaying protocol and a multi-antenna eavesdropper) were considered in [21]. The authors of [29] studied and investigated the joint effect of fading and co-channel interference (CCI) on the secrecy performance of a wireless communications system when maximal ratio combining (MRC) is employed. From their point of view, the security issue remains unresolved and requires further study. The conclusion is proposed in the last section of the paper

Network

Energy Harvesting Phase

Information Transmission Phase

Intercept Probability

Numerical Results and Discussion

Conclusions