通信学报 ›› 2020, Vol. 41 ›› Issue (3): 136-144.doi: 10.11959/j.issn.1000-436x.2020047

• 学术论文 • 上一篇    下一篇

有限字符输入下基于截断速率的安全空间调制天线选择算法

丁青锋,奚韬,杨倩,丁旭   

  1. 华东交通大学电气与自动化工程学院,江西 南昌 330013
  • 修回日期:2020-02-16 出版日期:2020-03-25 发布日期:2020-03-31
  • 作者简介:丁青锋(1980- ),男,安徽安庆人,博士,华东交通大学副教授、硕士生导师,主要研究方向为轨道交通无线通信、智能优化、下一代无线通信技术等|奚韬(1995- ),男,江苏扬中人,华东交通大学硕士生,主要研究方向为空间调制系统与物理层安全|杨倩(1994- ),女,湖北黄冈人,华东交通大学硕士生,主要研究方向为空间调制系统与物理层安全|丁旭(1993- ),男,湖北黄冈人,华东交通大学硕士生,主要研究方向为空间调制系统与信号检测
  • 基金资助:
    国家自然科学基金资助项目(61961018);江西省杰出青年人才计划基金资助项目(20192BCB23013);江西省自然科学基金资助项目(20171BAB202001);江西省自然科学基金资助项目(20192ACB21003)

Antenna selection algorithm based on cut-off rate for secure spatial modulation with finite alphabet input

Qingfeng DING,Tao XI,Qian YANG,Xu DING   

  1. School of Electrical and Automation Engineering,East China Jiaotong University,Nanchang 330013,China
  • Revised:2020-02-16 Online:2020-03-25 Published:2020-03-31
  • Supported by:
    The National Natural Science Foundation of China(61961018);The Jiangxi Province Foundation for Distinguished Young Scholar(20192BCB23013);The Natural Science Foundation of Jiangxi Province(20171BAB202001);The Natural Science Foundation of Jiangxi Province(20192ACB21003)

摘要:

针对有限字符输入下人工噪声辅助空间调制系统的安全传输问题,提出了一种基于截断速率的天线选择算法。考虑到保密速率的闭式表达式难以得到,通过引入截断速率作为保密速率的一种近似的有效指标,将最大化保密速率问题转化为最大化截断速率优化问题。同时,为降低算法复杂度,对截断速率算法的搜索进行优化,通过对矩阵范数按列展开,将对应天线组合的矩阵范数问题简化为对应天线的列范数问题。最后,将只对窃听者产生干扰的人工噪声矢量映射在合法信道空间,进一步提升系统保密速率。仿真结果表明,所提出的基于截断速率算法的系统保密速率性能优于基于信漏噪比算法和最大化保密速率算法,并具有更低的复杂度。

关键词: 安全空间调制, 保密速率, 发射天线选择, 截断速率, 人工噪声

Abstract:

For the security transmission of artificial noise with finite alphabet inputs in secure spatial modulation system,an antenna selection algorithm based on cut-off rate (COR) was proposed.Considering that it was difficult to obtain the closed-form expression of the secrecy rate,the problem of maximizing the secrecy rate into that of maximizing the COR was converted by the algorithm.Meanwhile,in order to reduce the complexity,the COR algorithm was optimized by expanding the matrix norm in columns,which was corresponding to the problem of antenna combination.Finally,the artificial noise vector was mapped in the legitimate channel space to optimize secrecy rate,which only interferes with eavesdropper.The simulation results show that the proposed algorithm based on COR is superior to the leakage-based algorithm and the maximum secrecy rate algorithm,and has lower complexity.

Key words: secure spatial modulation, secrecy rate, transmit antenna selection, cut-off rate, artificial noise

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