基于扰动理论无线物理层安全模型及敏度分析

摘要

针对无线物理层安全多种代表模型在理论描述或者实际应用方面存在一定的局限性这一问题，基于扰动理论研究，提出了一种适用于频率选择性衰落环境的物理层安全模型，该模型能够通过调节扰动阈值来平衡实际系统的可用性和安全性。最后通过敏度分析和应用实例说明了模型的有效性和可靠性。%　　Many typical models had been proposed for wireless physical-layer security, which have some disadvantages and limitations in theoretical analysis or implementation respectively. Considering these shortages brought about by the existing works, a physical-layer security model used in frequency selective fading channel based on perturbation theory was proposed. The proposed model finds a tradeoff between the availability and the security of the practical system by adjusting the threshold of perturbation. At last, the validity and feasibility are illustrated by the sensitivity analysis and application example.