电子学报 ›› 2022, Vol. 50 ›› Issue (1): 98-105.DOI: 10.12263/DZXB.20200622

• 学术论文 • 上一篇    下一篇

多播传输模式下的卫星通信安全波束成形算法

林敏1, 张健1, 林志2, 王子宁1, 郭克锋3, 欧阳键1   

  1. 1.南京邮电大学通信与信息工程学院,江苏 南京 210003
    2.国防科技大学电子对抗学院,安徽 合肥 230037
    3.航天工程大学航天信息学院,北京 101407
  • 收稿日期:2020-06-24 修回日期:2020-08-30 出版日期:2022-01-25 发布日期:2022-01-25
  • 作者简介:林 敏 男,1972年生.博士、教授、博士生导师.主要研究方向为无线通信系统、智能信号处理、天线新技术等. E-mail:linmin@njupt.edu.cn
    张 健 男,1997年生.硕士研究生.研究方向为无线通信、智能信号处理. E-mail:13675119007@163.com
    林 志 男,1992年生.博士、讲师.主要研究方向为无线通信系统、阵列信号处理、可重构智能反射面等. E-mail:linzhi@nudt.edu.cn
  • 基金资助:
    重点国际合作项目(61720106003);上海航天科技创新基金(SAST2019-095);国家自然科学基金(61901490);国防科技大学科研计划项目(ZK21-33);复杂电子系统仿真实验室基础研究课题(DXZT-JC-ZZ-2019-009)

Secure Beamforming Algorithm for Satellite Communication in Multicast Transmission Mode

LIN Min1, ZHANG Jian1, LIN Zhi2, WANG Zi-ning1, GUO Ke-feng3, OUYANG Jian1   

  1. 1.College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing,Jiangsu 210003,China
    2.Institute of Electronic Countermeasure,National University of Defense Technology,Hefei,Anhui 230037,China
    3.College of Aerospace Information,Aerospace Engineering University,Beijing 101407,China
  • Received:2020-06-24 Revised:2020-08-30 Online:2022-01-25 Published:2022-01-25

摘要:

与地面无线通信系统相比,卫星通信的广域覆盖特性使得信息安全传输问题成为该领域更具挑战性的研究课题.为了提升多播传输模式下卫星通信系统的物理层安全性能,本文针对不同信道状态信息(Channel State Information,CSI)研究了两种安全波束成形(Beamforming,BF)算法.在合法用户和窃听者CSI均准确已知的条件下,提出了基于半正定规划(Semidefinite Program,SDP)和惩罚函数相结合的安全BF算法;在合法用户CSI准确已知但窃听者CSI存在误差的条件下,提出了一种迭代的鲁棒安全BF算法.最后,计算机仿真不仅验证了本文所提BF算法的正确性和有效性,而且展示了所提出的鲁棒算法能够有效地降低信道信息误差对系统安全性能的影响.

关键词: 卫星通信, 物理层安全, 波束成形, 多播传输

Abstract:

Compared with the terrestrial wireless communication system, information secure transmission has become a more challenging research topic as a result of the wide coverage of satellite communication. In order to improve the physical layer security performance of multibeam satellite communication system in multicast transmission mode, two beamforming(BF) algorithms based on different channel state information(CSI) are studied in this paper. Under the condition that both legitimate user and eavesdropper CSI are known accurately, a secure BF algorithm based on semidefinite program(SDP) and penalty function is proposed. An iterative robust secure BF algorithm is proposed under the condition that the legitimate user CSI is known accurately but the eavesdropper CSI has errors. Finally, computer simulation not only verifies the correctness and effectiveness of the proposed BF algorithms in this paper, but also shows that the robust algorithm effectively reduce the influence of channel information errors on security performance of the system.

Key words: satellite communications, physical layer security, beamforming, multicast transmission

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