电讯技术2017，Vol.57Issue(12)：1369-1375,7.DOI:10.3969/j.issn.1001-893x.2017.12.004
面向卫星-地面协同通信系统的物理层安全传输设计
Physical Layer Security Transmission Design for a Satellite-Terrestrial Coordinated Communication System
摘要
Abstract
In order to enhance the secure transmission of satellite-terrestrial coordinated communication system in presence of multiple eavesdroppers, a coordinated transmission optimization problem is estab-lished by applying security rate as the maximization criterion and the transmission quality for the terrestrial link and the transmission power for the satellite and ground base station as constraints. Next, due to the non-convexity of the optimization problem, the auxiliary variable method is used to decompose the original problem into two sub-problems. The main problem is a one-dimensional search problem, whereas the sec-ondary problem can be transformed into a convex problem by means of semi-definite relaxation and the ma-trix transformation approaches. Finally, a satellite-terrestrial coordinated transmission scheme based on physical layer security is proposed to find the optimal beamforming solution. Computer simulation demon-strates that the increase of signal transmission power and the number of satellite antennas can increase the security rate, while the increase of the number of eavesdroppers will reduce the system security.关键词
卫星-地面协同通信系统/物理层安全/波束成形/凸优化Key words
satellite-terrestrial coordinated communication system/physical layer security/beamforming/convex optimization分类
信息技术与安全科学引用本文复制引用
欧阳键,许拔,袁灿,姜杨威,庄天行..面向卫星-地面协同通信系统的物理层安全传输设计[J].电讯技术,2017,57(12):1369-1375,7.基金项目
南京邮电大学校级科研基金(NY214140,NY215135) （NY214140,NY215135）
国防科技项目 （）
