WSEAS Transactions on Communications

Print ISSN: 1109-2742
E-ISSN: 2224-2864

Volume 16, 2017

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of WSEAS Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

DC Programming and DCA for Secrecy Rate Maximization in a Wireless Network with Multiple Eavesdroppers

AUTHORS: Hoai An Le Thi, Thi Thuy Tran, Tao Pham Dinh

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ABSTRACT: In this paper, we consider a wireless network where a source tries to send messages to a destination while keeping them secret from multiple eavesdroppers. To enhance secrecy, the transmission is performed with a cooperation of friendly jammers which make artificial noise to confound eavesdroppers and beamforming technique to direct jamming signal to intended targets. The purpose is to determine beamforming coefficients in order to maximize secrecy rate under the total jammer power constraint. The existing method solved this problem in a special case in which the beamforming coefficients were designed to completely eliminate jamming signal at the destination and a heuristic approach was applied to obtain a suboptimal solution for this case. We address this problem via a new approach based on DC (Difference of Convex functions) programming and DCA (DC Algorithm). We first reformulate this problems as a general DC program, i.e. minimizing a DC function under some DC constraints, and develop a DCA based algorithm for solving it. The experimental results show that the secrecy rate obtained by the proposed algorithm is better than those achieved by the existing one.

KEYWORDS: Cooperative Jamming, Beamforming, Physical Layer Security, DC programming and DCA


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WSEAS Transactions on Communications, ISSN / E-ISSN: 1109-2742 / 2224-2864, Volume 16, 2017, Art. #10, pp. 70-76

Copyright © 2017 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution License 4.0

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