基于天线分组的携能中继的保密传输方案

发布时间：2018-03-18 12:50

本文选题：物理层安全　切入点：携能通信　出处：《系统工程与电子技术》2017年08期 　论文类型：期刊论文

【摘要】：由一个单天线的源节点、目的节点和一个多天线的中继节点组成的存在窃听节点的两跳无线网络,研究其在中继节点能量收集约束下的物理层保密传输方案。窃听节点的位置和信道状态不可知,采用由目的节点在第1跳时发送人工噪声进行协作干扰的方式保护两跳传输中保密信息。中继节点采用携能通信工作模式,从接收的信号和人工噪声中提取能量用于信号的转发。第1跳时,中继节点的天线分为两组,分别用于保密信号的接收合并和能量的收集。在第2跳时,中继节点利用所有天线采用波束赋形技术转发信号。由于不能获得窃听信道状态信息,因此以最大化目的节点的速率为目的,对中继节点的转发波束赋形矢量进行优化,并给出一种次优的低复杂度的天线分组策略。仿真结果表明,提出的方案能获得可观的保密速率,提出的天线分组策略的性能明显优于功率分裂策略。
[Abstract]:A two-hop wireless network with eavesdropping nodes consisting of a single antenna source node, a destination node and a multi-antenna relay node, The physical layer secure transmission scheme under the energy collection constraint of relay nodes is studied. The location and channel state of eavesdropping nodes are unknown. The cooperative interference of artificial noise from the destination node at the first hop is adopted to protect the confidential information in the two-hop transmission. The relay node adopts the mode of portable communication. Energy is extracted from the received signal and artificial noise for the transmission of the signal. In the first hop, the antenna of the relay node is divided into two groups, which are used for the reception, merging and energy collection of the secure signal, respectively. Relay nodes transmit signals using beamforming technology using all antennas. Because the state information of eavesdropping channel can not be obtained, the forward beamforming vector of relay nodes is optimized to maximize the rate of destination nodes. The simulation results show that the proposed scheme can obtain considerable security rate and the performance of the proposed antenna grouping strategy is obviously better than that of the power splitting strategy.
【作者单位】：重庆邮电大学移动通信技术重庆市重点实验室;
【基金】：国家自然科学基金(61471076) 长江学者和创新团队发展计划(IRT1299) 重庆市教委科学技术研究项目(KJ1600413) 重庆市科委重点实验室专项经费资助课题
【分类号】：TN918

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