| 多跳协同中继网络下物理层安全传输方案 |
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| 引用本文： | 张广大,任清华,樊志凯.多跳协同中继网络下物理层安全传输方案[J].信号处理,2021,37(8):1541-1549. |
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| 作者姓名： | 张广大 任清华 樊志凯 |
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| 作者单位： | 空军工程大学信息与导航学院 |
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| 基金项目： | 国家重点实验室合作基金资助课题（kx162600022） |
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| 摘 要： | 针对多跳中继传输系统的信息安全传输问题，提出了一种基于全双工模式下多节点协作干扰(FD-MCJ)的物理层安全传输方案。该方案利用通信网络中的中继节点发送干扰信号恶化窃听节点的接收性能，同时中继节点根据信道状态信息(Channel State Information, CSI)自适应的选择两种情况下的安全传输方案。本文首先利用泊松点过程对窃听节点位置进行安全建模；然后，根据CSI可用程度，给出不同的安全传输具体方案，在考虑系统的跳数、天线间自干扰以及发射功率和干扰功率等因素下，推导FD-MCJ方案下系统保密中断概率的闭式解；最后，数值分析和蒙特卡洛仿真表明，理论推导的正确性以及多跳中继系统中采用全双工多节点协作干扰方案能够有效提升系统安全性能。
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| 关 键 词： | 多跳中继系统 物理层安全 协作干扰 信道状态信息 随机几何 全双工 保密中断概率 |
| 收稿时间： | 2021-02-09 |
Secure Transmission Scheme on Physical Layer in Multi-hop Cooperative Relay Network |
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| Affiliation: | Information and Navigation College,Air Force Engineering University |
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| Abstract: | Aiming at the problem of secure transmission of information in multi-hop relay transmission system, this paper proposes a secure transmission scheme based on multi-node cooperative jamming (FD-MCJ) in full-duplex mode. The scheme uses the relay in the communication network to send jamming signals to worsen the receiving performance of the eavesdroppers, and the relays adaptively choose the secure transmission scheme in two cases, according to the channel state information. In this paper, the Poisson point process is used to model the position of eavesdroppers. Then, on the basis of the availability of CSI, different specific schemes of secure transmission are given. Considering the hop number of the system, self-interference between antennas, transmitting power and jamming power. the closed expression of the system secrecy outage probability under FD-MCJ scheme is derived. Finally, numerical analysis and Monte Carlo simulations show that the theoretical derivation is correct and the use of full-duplex multi-node cooperative jamming scheme in multi-hop relay system can effectively improve the security performance of the system. Key words: multi-hop relay system; physical layer security; cooperative jamming; channel state information; stochastic geometry; full-duplex; secrecy outage probability; |
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