协作通信物理层安全策略性能分析

协作通信与物理层信息安全是现代无线通信领域中的两个具备研究价值的方面。结合了两者的特点,研究了基于协作通信的物理层安全模型,对其中的放大转发策略和协作拥塞策略进行了最优安全容量分析,并针对目前相关研究内容并未涉及详细的性能场景分析的情况,对放大转发策略与协作拥塞策略进行了多个不同场景下的安全容量性能对比并进行了相应的理论分析。仿真研究表明,放大转发策略比协作拥塞策略更加稳定,更不易受场景变化的影响,此外,增加中继的天线数量所带来的性能提升也等效于增加中继数量。

Performance Analysis of Physical Layer Security Schemes based on Cooperative Communication

Cooperative communication and physical layer security are two significant concepts in the area of wireless communication. This paper studies the physical layer security model based on cooperative communication, and analyzes the optimal secrecy capacity on amplify-and-forward scheme and cooperative-jamming scheme. Since current related research do not involve detailed performance analysis in different scenarios, this paper compares the performance in different scenarios between amplify-and-forward scheme and cooperative-jamming scheme. Simulation results show that amplify-and-forward scheme is more stable than cooperative-jamming scheme and is more difficult to be effected by the scenarios. Besides, increasing the number of antennas for relays can improve the secrecy performance, just like increasing the number of relays.