电信科学 ›› 2021, Vol. 37 ›› Issue (6): 105-114.doi: 10.11959/j.issn.1000-0801.2021121

• 研究与开发 • 上一篇    下一篇

一种基于合作干扰的主窃信道安全传输方法

徐赛, 韩帅, 孟维晓   

  1. 哈尔滨工业大学通信技术研究所,黑龙江 哈尔滨 150001
  • 修回日期:2021-03-16 出版日期:2021-06-20 发布日期:2021-06-01
  • 作者简介:徐赛(1987- ),男,博士,哈尔滨工业大学副教授,主要研究方向为物理层安全、移动通信技术和空天通信技术
    韩帅(1981- ),男,博士,哈尔滨工业大学教授,主要研究方向为无线信号处理、MIMO、非正交多址接入和卫星定位导航及对抗等
    孟维晓(1968- ),男,博士,哈尔滨工业大学电子与信息工程学院副院长、长聘教授、博士生导师,主要研究方向为无线通信与网络、空天地信息传输、精确定位与无缝导航

A secure transmission method based on cooperative jamming for correlated main and wiretap channels

Sai XU, Shuai HAN, Weixiao MENG   

  1. The Communications Research Center, Harbin Institute of Technology, Harbin 150001, China
  • Revised:2021-03-16 Online:2021-06-20 Published:2021-06-01

摘要:

提出一种基于合作干扰的安全传输方法,用以减少主窃信道之间相关性带来的保密损失,提高通信系统的保密性能。考虑现有的合作干扰方法集中于主窃信道相互独立的情形,因此,当主窃信道相关时,现有的合作干扰方法由于设计的局限性无法获得足够理想的保密性能。鉴于此,提出一种面向相关主窃信道具有针对性的合作干扰方法。基于相关主窃信道的合作干扰模型,对保密中断概率约束下的保密速率最大化问题进行了形式化。通过采用范数边界法和伯恩不等式法将优化问题的概率约束条件转化成近似的确定形式,能够获得波束成形和人工噪声的一组近似解。仿真结果显示,提出的合作干扰方法能够在高相关性的条件下减少通信系统的保密损失。

关键词: 物理层安全, 相关性, 合作干扰, 保密中断概率, 保密速率

Abstract:

A secure transmission method was proposed based on cooperative jamming to reduce the secrecy loss caused by the correlation between main and wiretap channels and to improve the secrecy.Considering that the existing methods of cooperative jamming focused on the case of independent main and wiretap channels, the achievable secrecy performance was not satisfactory.In view of this, a cooperative jamming method for correlated main and wiretap channels was proposed.Based on the model of cooperative jamming under correlated main and wiretap channels, the secrecy rate maximization under secrecy outage constraint was formulated.Then, the norm bounding approach and the Bernstein-type inequality approach were employed to approximately transform the probabilistic constraint into a deterministic form, and a safe approximate solution of beamforming vector and AN covariance matrix was obtained.Simulation results show that the proposed method can reduce the secrecy loss under high correlation.

Key words: physical layer security, correlation, cooperative jamming, secrecy outage probability, secrecy rate

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