卫星通信网络基于保密中断概率最小化的功率分配方案  

Power Allocation Based on the Minimization of Secrecy Outage Probability for Satellite Communication Networks

作　　者：徐玺贺 台祥雪 韩帅[2] 孟维晓[2] XU Xihe;TAI Xiangxue;HAN Shuai;MENG Weixiao(Institute of Telecommunication Satellite,China Academy of Space Technology,Beijing 100094,China;Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]中国空间技术研究院通信卫星事业部,北京100094 [2]哈尔滨工业大学,黑龙江哈尔滨150001

出　　处：《移动通信》2018年第7期66-70,76,共6页Mobile Communications

基　　金：国家自然科学基金(61771169)

摘　　要：为了研究如何解决卫星通信网络的物理层安全通信问题,提出了适用于卫星通信网络的物理层安全通信模型,通过添加协作干扰中继的方式对窃听者进行干扰,从而获得保密容量。为了进一步提升系统的保密容量,研究了在总的发射功率一定的情况下,卫星与中继间的功率分配,提出了基于保密中断概率最小化的功率分配方案。通过优化功率分配因子,使系统的保密中断概率性能达到最优。仿真结果证明了基于保密中断概率最小化的功率分配方案在保密中断概率性能和遍历保密容量性能方面均优于均匀的功率分配方案,提升了系统的保密性能。This paper mainly solves the problem of physical layer security communication in satellite communication networks.A physical layer security communication model suitable for satellite communication networks is proposed,which adds cooperative interference relays to interference the eavesdropper to obtain confi dential capacity.In order to further improve the secrecy capacity of system,the power allocation between satellites and relays is studied.When the total transmit power is fi xed,a power allocation scheme based on the minimization of the secrecy outage probability is proposed.By optimizing the power allocation factor,secrecy outage probability performance of system is optimized.The simulation results show that the power allocation scheme based on the minimization of the secrecy outage probability is superior to the uniform power allocation scheme in terms of both the secrecy outage probability performance and the ergodic secrecy capacity performance.The security performance of the system is improved.

关 键 词：卫星通信 物理层安全 功率分配 保密中断概率 

分 类 号：TN918.82[电子电信—通信与信息系统]