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- Title
面向卫星-地面协同通信系统的物理层安全传输设计.
- Authors
欧阳键; 许拔; 袁灿; 姜杨威; 庄天行
- 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 established 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 secondary problem can be transformed into a convex problem by means of semi-definite relaxation and the matrix transformation approaches. Finally, a satellite-terrestrial coordinated transmission scheme based on physical layer security is proposed to find the optimal beamforming solution. Computer simulation demonstrates 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.
- Publication
Telecommunication Engineering, 2017, Vol 57, Issue 12, p1369
- ISSN
1001-893X
- Publication type
Article
- DOI
10.3969/j.issn.1001-893x.2017.12.004