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首页> 外文期刊>Wireless Communications Letters, IEEE >Co-Ordinated Secure Beamforming in -User Interference Channel With Multiple Eavesdroppers
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Co-Ordinated Secure Beamforming in -User Interference Channel With Multiple Eavesdroppers

机译:具有多个窃听者的用户干扰信道中的协调安全波束成形

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摘要

In this letter, we consider secrecy communications over multiple-input single-output -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.
机译:在这封信中,我们考虑了在存在多个窃听者的情况下通过多输入单输出用户干扰信道进行的保密通信。每个合法的数据链接都由几个窃听者窃听。为了使窃听者对机密消息一无所知,我们提出了一种协调的安全波束成形方案,该方案可根据每个发射机的功率限制来最大化机密总和。为了解决由此产生的非凸问题,我们通过使用半定松弛(SDR)技术和保守的凸近似将其近似为几个半定程序(SDP)。实验证明,该算法在几次迭代中收敛。此外,我们证明了通过SDR获得的SDP问题始终会产生一种排名靠前的解决方案,从而使SDR趋于紧密。仿真表明了该方案的有效性。

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