非理想信道状态下多波束卫星通信的鲁棒安全传输设计

发布时间：2018-07-23 07:54

【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(Semi Definite 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。
[Abstract]:Considering the scenarios of multi-antenna eavesdropping users in multi-beam satellite communication and the deterioration of system security caused by the non-ideal channel state information, the multi-user mime (Multi input single output Multi Eavesdropper) system, which is not ideal for both legitimate and eavesdropping channels, is considered. This paper presents two robust secure transmission methods based on two types of channel errors. Based on the deterministic error model, the worst-case secure rate maximization problem (WC-SRM) is solved by using the joint optimization design of transmit beamforming and artificial noise covariance to solve the worst-case secure rate maximization problem (WC-SRM). The non-convex WC-SRM problem is equivalent to a 1-dimensional search problem by deducing and analyzing, and the optimal solution of the equivalent problem can be obtained by solving a series of Semi finite programming (SDP) problems. In order to solve the problem of outage probability constraint security rate maximization (OP-SRM) under statistical error model, this paper presents a reliable approximation scheme for robust security design based on WC-SRM. Simulation results show that the proposed method is robust and effective.
【作者单位】：空军工程大学信息与导航学院;
【基金】：国家自然科学基金(61271250,61571460)~~
【分类号】：TN927.2

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