电子学报 ›› 2020, Vol. 48 ›› Issue (3): 463-469.DOI: 10.3969/j.issn.0372-2112.2020.03.007

• 学术论文 • 上一篇    下一篇

基于STBC的无线认知NOMA系统物理层安全性能研究

李美玲1, 田莉莉1, 杨晓霞1, 李莹1, 王安红1, 董增寿1, Sami Muhaidat2, Mehrdad Dianati3   

  1. 1. 太原科技大学电子信息工程学院, 山西太原 030024;
    2. Khalifa大学, 阿联酋阿布扎比;
    3. 华威大学, 英国英格兰
  • 收稿日期:2019-05-22 修回日期:2019-09-08 出版日期:2020-03-25
    • 通讯作者:
    • 田莉莉
    • 作者简介:
    • 李美玲 女,1982年生于山西宁武.2012年毕业于北京邮电大学,获博士学位.现为太原科技大学副教授.主要研究方向为无线通信关键技术、认知无线网络、协作通信、物理层安全技术、NOMA.E-mail:meiling_li@126.com;杨晓霞 女,1995年生于山西阳曲,现为太原科技大学电子信息工程学院硕士研究生,主要研究方向为无线网络的物通信物理层安全性能.E-mail:2509085887@qq.com;李莹 女,1994年生于山西河津,现为太原科技大学电子信息工程学院硕士研究生,主要研究方向为无线认知网络的物理层安全性能.E-mail:564932926@qq.com
    • 基金资助:
    • 国家自然科学基金 (No.61672373); 山西省高等学校科技创新项目 (No.201802090); 山西省互联网+3D打印协同创新中心项目; 山西省科技创新团队项目 (No.201705D131025); 山西省1331工程重点创新团队项目; 山西省重点研发计划项目 (No.201903D121117); 山西省研究生优秀创新项目 (No.2019SY491)

On the Secrecy Performance of NOMA-Based Cognitive Radio Networks with STBC

LI Mei-ling1, TIAN Li-li1, YANG Xiao-xia1, LI Ying1, WANG An-hong1, DONG Zeng-shou1, Sami Muhaidat2, Mehrdad Dianati3   

  1. 1. School of Electronic and Information Engineering, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, China;
    2. University of Khalifa, Abu Dhabi, The United Arab Emirates;
    3. University of Warwick, England, UK
  • Received:2019-05-22 Revised:2019-09-08 Online:2020-03-25 Published:2020-03-25
    • Corresponding author:
    • TIAN Li-li
    • Supported by:
    • National Natural Science Foundation of China (No.61672373); Science and Technology Innovation Program of Colleges and Universities in Shanxi Province (No.201802090); The Collaborative Innovation Center of Internet+3D Printing in Shanxi Province; Science and Technology Innovation Team Project of Shanxi Province (No.201705D131025); 1331 Key Innovation Team Project of Shanxi Province; Key R&D project of Shanxi Province (No.201903D121117); Excellent Innovative Project for Graduate Student in Shanxi Province (No.2019SY491)

摘要: 基于非正交多址接入(NOMA,Non-Orthogonal Multiple Access)的认知无线电(CR,Cognitive Radio)网络物理层传输面临主用户干扰和第三方窃听双重干扰威胁.本文提出利用空时编码(STBC,Space Time Block Coding)技术提高认知用户物理层安全性能,推导了任意认知用户的安全中断概率闭合表达式.通过蒙特卡洛仿真进行验证,结果表明,所提STBC-CR-NOMA相比未采用STBC编码方案的CR-NOMA可以明显提高用户的安全中断概率,且随着认知发射功率的增大,近端用户安全中断性能提高越大,而远端用户安全中断性能提升受认知基站发射功率的影响较小.仿真结果还表明,通过调整功率分配系数对远端用户和近端用户的安全中断性能影响不同.

关键词: 非正交多址接入, 认知无线电, 空时编码, 窃听者, 物理层安全, 安全中断概率

Abstract: The physical layer transmission faces the interference from primary users and eavesdroppers in cognitive radio networks based on non-orthogonal multiple access (CR-NOMA). In this paper, Alamouti space-time block coded (STBC) is utilized to improve the physical layer security transmission performance. The closed-form expressions for the security outage probability of all secondary users are derived. We provide extensive Monte-Carlo simulation results to corroborate the analysis. The results show that the security outage probability of stronger cognitive users is improved by the proposed STBC-NOMA-based CR compared with the traditional NOMA-based CR. Moreover, the security outage probability of the stronger cognitive users experiences performance enhancement with the increase of the cognitive transmission power, whilst the security outage probability of weaker cognitive users will be less impacted by the transmission power. In addition, we demonstrate that the power allocation coefficients will have different impact on the stronger cognitive users and the weaker users.

Key words: non-orthogonal multiple access, cognitive radio, space time block code, eavesdropper, physical layer security, security outage probability

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