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Co-Ordinated Secure Beamforming in --User Interference Channel With Multiple Eavesdroppers | IEEE Journals & Magazine | IEEE Xplore

Co-Ordinated Secure Beamforming in K-User Interference Channel With Multiple Eavesdroppers


Abstract:

In this letter, we consider secrecy communications over multiple-input single-output K-user interference channel in the presence of multiple eavesdroppers. Each legitim...Show More

Abstract:

In this letter, we consider secrecy communications over multiple-input single-output K-user interference channel in the presence of multiple eavesdroppers. Each legitimate data link is wiretapped by several eavesdroppers. To keep the eavesdroppers ignorant of the confidential messages, we propose a co-ordinated secure beamforming scheme for maximizing the secrecy sum-rate subject to the individual power constraint of each transmitter. To solve the resultant nonconvex problem, we approximate it into a few semidefinite programs (SDPs) by employing the semidefinite relaxation (SDR) technique and a conservative convex approximation. It is demonstrated experimentally that the proposed algorithm converges within a few iterations. Furthermore, we prove that the SDP problem obtained via SDR always yields a rank-one solution such that the SDR is tight. Simulations show the efficacy of the proposed scheme.
Published in: IEEE Wireless Communications Letters ( Volume: 5, Issue: 2, April 2016)
Page(s): 212 - 215
Date of Publication: 20 January 2016

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