物理层安全约束下的AF双向中继系统波束赋形和人工干扰联合设计

发布时间：2018-06-16 14:43

本文选题：物理层安全 + 双向中继系统　；参考：《信号处理》2014年11期

【摘要】：波束赋形和人工干扰是现有研究中最为常见的两种物理层安全增强技术,本文针对AF(放大转发)双向中继模型,探讨了两者的联合设计问题。在已知理想信道状态信息的条件下,本文提出了一种波束赋形和人工干扰的混合协同传输方案,推导了总功率受限条件下的和安全速率,通过两步迭代搜索算法得到了其最佳联合方案,并与一种低复杂度的次佳联合方案进行比较。仿真结果验证了所得联合方案优于次佳联合方案,并进一步改善了AF双向中继系统的安全性能。
[Abstract]:Beamforming and artificial interference are two of the most common physical layer security enhancement techniques. In this paper, the joint design of the two methods is discussed for the AFR (amplifying and forwarding) bidirectional relay model. Under the condition that the ideal channel state information is known, a hybrid cooperative transmission scheme with beamforming and artificial interference is proposed, and the sum security rate under the condition of total power constraint is derived. The optimal joint scheme is obtained by two-step iterative search algorithm and compared with a low-complexity sub-optimal joint scheme. The simulation results show that the proposed scheme is superior to the sub-optimal scheme, and the security performance of AF bidirectional relay system is further improved.
【作者单位】：解放军理工大学通信工程学院;
【基金】：国家自然科学基金(61371122,61301162) 中国博士后科学基金(2013T60912)资助项目
【分类号】：TN918

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