Artificial-Noise-Aided Optimal Beamforming in Layered Physical Layer Security

Artificial-Noise-Aided Optimal Beamforming in Layered Physical Layer Security
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分层物理层安全中的人工噪声辅助最优波束形成

DOI:
10.1109/lcomm.2018.2881182
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发表时间:
2019
期刊:
IEEE Communications Letters
影响因子:
--
通讯作者:
Zhou Yuchen
Zhou Yuchen
中科院分区:
其他
文献类型:
--
作者:
Zhang Wei;Chen Jian;Kuo Yonghong;Zhou Yuchen

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在这封信中,我们开发了一种新的分层的物理层安全模型,同时保护多个消息。它维护一个分层的安全结构,其中从基站发送的每个消息都有一个安全级别,网络中的每个用户都有相应的安全许可。针对基本的两层单播系统,提出了一种人工噪声辅助的最优波束形成方案,在满足低层信息保密率约束的同时,最大限度地提高了系统的信息安全性能.由于问题的非凸性,提出了一种基于逐次凸逼近的算法来获得原问题的安全凸逼近。然后,提出了一种低复杂度的迫零波束形成方案,通过降低计算复杂度来实现高效率。仿真结果验证了该方案在提高整体保密性能方面的优越性。
In this letter, we develop a novel layered physical layer security model to secure multiple messages simultaneously. It maintains a hierarchical security structure, in which each message transmitted from the base station has a security level, and each user in the network has a security clearance correspondingly. Focusing on the basic two-layer unicast system, we propose an artificial-noise-aided optimal beamforming scheme to maximize the higher level information security performance while adhering to the low-level information secrecy rate constraint. Due to the nonconvexity of the problem formulated, a successive convex approximation-based algorithm is proposed to earn a safe convex approximation of the original. Afterward, a low-complexity zero-forcing beamforming scheme is proposed to achieve high efficiency by reducing the computational complexity. Simulation results validate the superiority of our schemes on the promotion of the overall secrecy performance.
DOI: --
发表时间: 2018-07
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影响因子: --
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