通信学报 ›› 2018, Vol. 39 ›› Issue (9): 20-30.doi: 10.11959/j.issn.1000-436x.2018155

• 论文Ⅰ:5G及认知协作网络 • 上一篇    下一篇

全双工加扰的非可信中继系统的渐近性能分析

赵睿1,谭星1,李元健1,贺玉成1,李春国2   

  1. 1 华侨大学厦门市移动多媒体通信重点实验室,福建 厦门 361021
    2 东南大学信息科学与工程学院,江苏 南京 210096
  • 修回日期:2018-07-15 出版日期:2018-09-01 发布日期:2018-10-19
  • 作者简介:赵睿(1980-),男,江苏扬州人,博士,华侨大学教授,主要研究方向为无线通信信号处理、协作通信和物理层安全等。|谭星(1993-),男,重庆人,华侨大学硕士生,主要研究方向为物理层安全技术、协作中继通信技术等。|李元健(1993-),男,山东德州人,华侨大学硕士生,主要研究方向为无线通信信号处理、物理层安全技术等。|贺玉成(1964-),男,山西太原人,博士,华侨大学教授,主要研究方向为无线通信信号处理、深空通信和信道编码等。|李春国(1983-),男,山东胶州人,博士,东南大学教授、博士生导师,主要研究方向为新一代移动通信技术、MIMO-OFDM技术、协作通信和水下无线通信技术等。
  • 基金资助:
    国家自然科学基金资助项目(61401165);国家自然科学基金资助项目(61671144);华侨大学中青年教师科研提升资助计划(ZQN-PY407)

Asymptotic performance analysis of untrusted relay system with full-duplex jamming destination

Rui ZHAO1,Xing TAN1,Yuanjian LI1,Yucheng HE1,Chunguo LI2   

  1. 1 Xiamen Key Laboratory of Mobile Multimedia Communications,Huaqiao University,Xiamen 361021,China
    2 School of Information Science and Engineering,Southeast University,Nanjing 210096,China
  • Revised:2018-07-15 Online:2018-09-01 Published:2018-10-19
  • Supported by:
    The National Natural Science Foundation of China(61401165);The National Natural Science Foundation of China(61671144);The Promotion Program for Young and Middle-aged Teacher in Science and Technology Research of Huaqiao University(ZQN-PY407)

摘要:

在物理层安全领域,协作中继技术因具备提升网络容量和扩展网络覆盖范围等优点,受到学术界广泛关注。但是,协作中继在某些时候可能存在非可信情形。基于此,在瑞利衰落信道下,为提升非可信中继系统安全性能,提出一种多天线全双工目的节点加扰(FDJ,full-duplex destination jamming)策略。为最大化系统安全容量,针对多天线目的节点提出一种切换分离式最优天线选择(OAS,optimal antenna selection)方案,并设计出信源和目的节点功率分配优化方案,给出相应的安全性能指标闭合表达式。在大规模天线下,推导出 FDJ-OAS 策略的遍历可达安全速率和瞬时安全容量下最优功率分配因子闭合表达式。在不同的渐近条件下,推导出 FDJ-OAS 策略的安全中断概率的渐近线闭合表达式。仿真结果显示,理论分析与蒙特卡洛仿真曲线十分吻合,FDJ-OAS策略的安全分集阶数与天线数呈正比,可实现天线全分集,凸显了FDJ-OAS策略的性能优越性。

关键词: 物理层安全, 全双工目的节点加扰, 最优天线选择, 遍历可达安全速率, 安全中断概率

Abstract:

The cooperative relay technique in the field of physical layer security is widely concerned by the academic community,due to the advantages of increasing the network capacity and expanding the network coverage.However,cooperative relays may play as untrusted nodes in some certain circumstances.Based on this,to enhance the secrecy performance of untrusted relay systems,a novel full-duplex destination jamming (FDJ) scheme was proposed in the Rayleigh fading channel.In order to maximize the system’s secrecy capacity,a switchable split-optimal antenna selection (OAS) scheme was proposed for a multiple-antenna destination,the power allocation optimization scheme between the source and destination was designed,and the corresponding closed-form expressions of secrecy performance were given.In the large-scale antennas analysis,the closed-form expressions of the ergodic achievable secrecy rate and the optimal power allocation factor of instantaneous secrecy capacity for the FDJ-OAS scheme were derived.Furthermore,based on different asymptotic cases,the asymptotic analyses of secrecy outage probability for the FDJ-OAS scheme were significantly analyzed.Simulation results show that the analytical curves match well with the Monte-Carlo simulation results.It is concluded that the diversity order of the FDJ-OAS scheme is proportional to the number of antennas and antenna diversity can be achieved,which reveals the advantages of the proposed FDJ-OAS scheme.

Key words: physical layer security, full-duplex destination jamming, optimal antenna selection, secrecy outage probability

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