Artificial Noise-Based Physical-Layer Security in Interference Alignment Multipair Two-Way Relaying Networks
Artificial Noise-Based Physical-Layer Security in Interference Alignment Multipair Two-Way Relaying Networks
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DOI：
10.1109/access.2018.2817264
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发表时间：
2018
期刊：
影响因子：
3.9
通讯作者：
D. Tubail;M. El-Absi;S. Ikki;W. Mesbah;T. Kaiser
中科院分区：
文献类型：
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作者：
D. Tubail;M. El-Absi;S. Ikki;W. Mesbah;T. Kaiser
针对基于干扰对齐（IA）的单中继单窃听多对通信系统，提出了两种新的物理层安全算法。根据这些建议的物理层安全算法，用户混合他们的信息信号与干扰信号，并在多址接入阶段广播他们，而中继转发混合信号在广播阶段。此外，中继和用户的预编码和解码矩阵的设计方式，使合法的接收机，以消除干扰信号，而隐藏的窃听者是无法消除这些干扰流。在这种情况下，所提出的算法被设计成以最小功率发送信息流，将用户接收的信噪比保持在预定阈值以上，并将剩余功率用于干扰信号。因此，用户和中继的功率预算分配制定为一个联合优化问题，可以解决使用迭代优化算法和半定规划。在这种方式中，提出了四种传输模型来管理不同用户之间的人工噪声传输，以实现用户和速率和保密率之间的折衷。大量的仿真结果表明，所提出的算法和传输模型在实现基于IA的多用户中继网络的传输安全的效率。
This paper introduces two novel physical-layer security algorithms for interference alignment (IA)-based multipair communication systems with a single half-duplex relay and a single eavesdropper. According to these proposed physical-layer security algorithms, users mix their information signals with jamming signals, and broadcast them at the multiple access phase, while the relay forwards the mixed signals at the broadcast phase. Moreover, the relay and users’ precoding and decoding matrices are designed in a way which enables the legitimate receivers to eliminate the jamming signals while the hidden eavesdropper is unable to eliminate these jamming streams. In this context, the proposed algorithms are designed to transmit the information streams with minimum power, preserving the user received signal to noise ratio above a pre-determined threshold and utilizing the remaining power for the jamming signals. Therefore, the user and relay power budgets allocation is formulated as a joint optimization problem that can be solved using an iterative optimization algorithm and semi-definite programming. In such fashion, four transmission models are proposed to manage the artificial noise transmission among the different users to achieve a tradeoff between the users sum-rate and secrecy rate. Extensive simulation results are provided to show the efficiency of the proposed algorithms and the transmission models in achieving the transmission security for IA-based multiuser relaying networks.