非理想信道状态下多波束卫星通信的鲁棒安全传输设计

王舒; 达新宇

doi:10.11999/JEIT160429

非理想信道状态下多波束卫星通信的鲁棒安全传输设计

doi: 10.11999/JEIT160429

王舒^1, ,,
达新宇¹

基金项目:

国家自然科学基金(61271250, 61571460)

计量
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- 被引次数: 0
出版历程
- 收稿日期: 2016-04-29
- 修回日期: 2016-09-23
- 刊出日期: 2017-02-19

Robust Secure Transmit Methods for Multibeam Satellite Communication with Imperfect Channel State Information

WANG Shu^{1
, ,},
DA Xinyu¹

Funds:

The National Natural Science Foundation of China (61271250, 61571460)

摘要

摘要: 考虑多波束卫星通信中存在多天线窃听用户的场景以及非理想信道状态信息带来的系统安全性能恶化，针对合法信道与窃听信道均不理想的多用户MISOME(Multi Input, Single Output, Multi Eavesdropper)系统，该文基于两种类型的信道误差提出了两种鲁棒安全传输方法。在确定误差模型下，利用发送波束成形以及人工噪声协方差的联合优化设计解决系统最差情况安全速率最大化问题(Worst-Case Secrecy Rate Maximization, WC-SRM)问题，通过推导分析将非凸的WC-SRM问题等价为一个1维搜索问题，而这个等价问题的最优解可通过一系列半定规划(SemiDefinite Program, SDP)问题的求解而得到。在统计误差模型下，为求解中断概率约束安全速率最大化(Outage Probability Constrained Secrecy Rate Maximization, OP-SRM)问题，该文提出一种基于WC-SRM的鲁棒安全设计的可靠近似方案。仿真分析验证了该文所提方法的鲁棒性与有效性。
- 多波束卫星通信系统 /
- 物理层安全 /
- 安全速率 /
- 鲁棒性
Abstract: Considering a general eavesdropping case where the eavesdropper is equipped with multiple antennas and two uncertainty models for the imperfect Channel State Information (CSI) on the main and eavesdroppers channels at the transmitter. Two robust transmission methods are proposed for multiuser Multiple-In, Single-Out, Multiple-antenna Eavesdropper (MISOME) systems to provide SINR guarantee for the legitimate user by the optimization of beamforming and artificial noise covariance matrix. For the deterministic uncertainty model, the Worst-Case Secrecy Rate Maximization (WC-SRM) problem is derived an equivalent problem of the WC-SRM problem through analysis. The equivalent problem can be recast as a single-variable optimization problem, which can be handled by solving a sequence of convex SemiDefinite Programs (SDPs). For the stochastic uncertainty model, a suboptimal scheme to solve the Outage Probability constrained Secrecy Rate Maximization (OP-SRM) problem is proposed based on the robust design for the WC-SRM problem. Finally, the effectiveness and the robustness of the proposed algorithms are validated by the simulation results.
- Multibeam satellite communication /
- Physical layer security /
- Secrecy rate /
- Robustness

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