Total transmit power minimization with physical layer security in multiuser peer-to-peer two-way relay networks

被引：0

作者：

Cheraghi M. ^{[1
]}

Darmani Y. ^{[1
]}

机构：

[1] Faculty of Electrical Engineering, K.N. Toosi University of Technology, Tehran

来源：

AEU - International Journal of Electronics and Communications | 2020年 / 124卷

关键词：

Multi-antenna eavesdropper; Multiuser peer-to-peer; Null space beamforming; Physical layer security; Power minimization; Two-way relay network;

D O I：

10.1016/j.aeue.2020.153317

中图分类号：

学科分类号：

摘要：

In this paper, we investigate a multiuser peer-to-peer (MUP2P) two-way relay network (TWRN) in the presence of an eavesdropper. In this network, only the k∗th pair of users demand secure communication. Also, a multi-antenna eavesdropper aim to wiretap the confidential data of the k∗th pair in both cooperative phases. Our goal is to minimize the total transmit power provided that the secrecy rate for two secure users and the quality of service constraints of each user are met. For simplifying the problem and also omitting the confidential information leakage in the second phase, a null space beamforming (NSBF) scheme is employed. Despite this, the problem is still non-convex. We divided the problem into two subproblems to solve beamforming and users’ power formulated in two iterations, respectively. Three different methods are proposed to solve the first subproblem, semi-definite programming (SDP), second-order cone programming (SOCP), and sequential quadratic programming (SQP). We employ a sequential parametric convex approximation (SPCA) method to convert the users’ power subproblem into inequality form a linear programming (LP) problem to solve it. In the following, we evaluate the computational complexity of these methods. Simulation results confirmed the validity of the proposed methods. © 2020 Elsevier GmbH

引用

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