Artificial-noise-aided secure beamforming in full-duplex wireless-powered relay

Ko, Myoungjun; Yun, Sangseok; Park, Junguk; Ha, Jeongseok

doi:10.1109/wcnc.2018.8377251

Cited by 1 publication

(3 citation statements)

References 14 publications

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“…For the above non-convex optimization problem (29), firstly, we should eliminate the equality constraint and convert it into an unconstrained problem. To remove the ZF constraint H RR W = 0, we redefine…”

Section: B Problem Optimization and Solutionmentioning

confidence: 99%

“…The authors also considered the practical interference-limited scenario and derived closed-form cumulative distribution function of the SINR at the destination and eavesdropper nodes. In [28], [29], the secrecy rate maximization problem subject to the constraint of harvested energy was considered, and the relay could harvest energy from the SI. In [28], it investigated two relaying protocols, namely amplify-and-forward (AF) and decode-and forward (DF).…”

Section: Introductionmentioning

confidence: 99%

“…In [28], it investigated two relaying protocols, namely amplify-and-forward (AF) and decode-and forward (DF). While in [29], it only considered the DF protocol, and the relay could transmit artificial noise to interrupt the eavesdropper. In [30], by jointly designing the energy beamforming vector, the information beamforming vector and the TS coefficient, one optimization problem was proposed to maximize the secrecy rate and an iterative algorithm was proposed to convert the optimization problem into three convex sub-problems.…”

Section: Introductionmentioning

confidence: 99%

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Secure Beamforming in Full-Duplex Two-Way Relay Networks With SWIPT for Multimedia Transmission

Liu

et al. 2020

IEEE Access

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With the advent of 5G, multimedia services in wireless communication networks will grow dramatically. So far, many researches have focused on improving security, throughput and channel capacity to support multimedia services. In this paper, a new system model of full-duplex (FD) two-way amplifyand-forward (AF) relay network with simultaneous wireless information and power transfer is presented, where two FD legitimate nodes with two single-antenna communicate with each other via energy-constrained AF relay with multiple antennas, and there is a half-duplex node with single antenna who intends to eavesdrop. This paper targets to maximize the secrecy sum rate of the system by designing the transmit beamforming vector of relay under power constraint and zero-forcing constraint, where two energy harvesting protocols, namely, power splitting and time switching are considered. However the maximization problem is a non-convex optimization, and it is very complex to solve. Therefore a linear method is used to find the lower bound of the secrecy sum rate and the non-convex problem is transformed into a convex optimization problem. After that, an iterative algorithm based on difference-of-convex programming is proposed to solve this convex optimization problem. The simulation results show the good convergence of the proposed iterative algorithm and also the superiority of secrecy sum rate of our proposed scheme compared with two traditional schemes. INDEX TERMS Full duplex, two-way relay, beamforming, energy harvesting, multimedia services.

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Section: B Problem Optimization and Solutionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%