大规模MIMO中继系统中多用户物理层安全传输方案

doi:10.3969/j.issn.0372-2112.2018.12.009

电子学报 ›› 2018, Vol. 46 ›› Issue (12): 2878-2887.DOI: 10.3969/j.issn.0372-2112.2018.12.009

大规模MIMO中继系统中多用户物理层安全传输方案

雷维嘉, 王娟兵, 谢显中

重庆邮电大学通信与信息工程学院, 重庆 400065

收稿日期:2017-05-16 修回日期:2018-01-18 出版日期:2018-12-25
- 作者简介:
- 雷维嘉 男,1969年出生,云南元谋人,教授、博士,现主要从事无线和移动通信技术的研究.E-mail:leiwj@cqupt.edu.cn;王娟兵 女,1993年出生,甘肃白银人,硕士研究生,现主要从事无线通信研究.E-mail:m15340521572_3@163.com
- 基金资助:
- 国家自然科学基金 (No.61471076）; 重庆市教委科学技术研究项目 (No.KJ1600413）; 重庆市基础研究与前沿探索项目 (No.cstc2018JCYJAX4032）

Security Transmission Scheme on Physical Layer for Multi-user in Massive MIMO Relay System

LEI Wei-jia, WANG Juan-bing, XIE Xian-zhong

School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received:2017-05-16 Revised:2018-01-18 Online:2018-12-25 Published:2018-12-25

摘要/Abstract

摘要： 研究大规模多输入多输出中继网络中的多用户物理层安全传输方案.系统模型中假设窃听节点与源节点和中继节点间都有直接链路，窃听节点可以接收到源节点和中继发送的信号.在不能获得窃听者信道状态信息的情况下，大规模MIMO中继采用简单的最大比合并/最大比发射信号处理方案，并配合中继零空间人工噪声和目的端的协作干扰实现多用户的信息安全传输.对保密速率及其在中继天线数无限增长时的渐近值进行了理论分析，并进行仿真.仿真结果显示系统的保密和速率随中继天线数的增长而增长，最终趋于理论渐近上界值.仿真结果也表明即使窃听节点具有多用户间干扰消除能力，并能同时拦截源节点和中继发送的信号，采用本文的方案仍然能获得可观保密速率.

关键词: 大规模MIMO, 中继, 多用户, 物理层安全

Abstract: The multi-user security transmission scheme on physical layer in a massive multiple-input multiple-output (MIMO) relay based network is studied. There are direct links between the eavesdropper and the source nodes and between the eavesdropper and the relay nodes, so the eavesdropper can receive the signals sent by the source nodes and the relay. The relay employs simple maximum ratio combining in the first stage and maximum ratio transmitting in the second stage by using this scheme and assisted by the null-space artificial noise sent by the relay and the collaboration interference sent by the destination node, security transmission of information between the multi user-pairs is realized even though the channel state information of the eavesdropper cannot be obtained. The secrecy rate and its asymptotic value when the number of antennas of the relay grows to infinity are analyzed. The simulation results show that the secrecy sum rate of the system increases with the number of relay antenna, and eventually reaches the asymptotic value. Furthermore, a considerable secrecy rate can be achieved even if the eavesdropper has the capability to cancel the multi-user interference and to intercept the signals sent by the source nodes and the relay.

Key words: massive MIMO, relay, multi-user, physical layer security

中图分类号:

TN925

雷维嘉, 王娟兵, 谢显中. 大规模MIMO中继系统中多用户物理层安全传输方案[J]. 电子学报, 2018, 46(12): 2878-2887.

LEI Wei-jia, WANG Juan-bing, XIE Xian-zhong. Security Transmission Scheme on Physical Layer for Multi-user in Massive MIMO Relay System[J]. Acta Electronica Sinica, 2018, 46(12): 2878-2887.

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大规模MIMO中继系统中多用户物理层安全传输方案

Security Transmission Scheme on Physical Layer for Multi-user in Massive MIMO Relay System

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