Co-Ordinated Secure Beamforming in -User Interference Channel With Multiple Eavesdroppers
- 20 January 2016
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Wireless Communications Letters
- Vol. 5 (2), 212-215
- https://doi.org/10.1109/lwc.2016.2519905
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.Keywords
Funding Information
- National Natural Science Foundation of China (NSFC) (61271188, 61401041, 61501046)
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