论文标题
最佳的友好干扰和传递电源分配的安全通信
Optimal Friendly Jamming and Transmit Power Allocation in RIS-assisted Secure Communication
论文作者
论文摘要
本文分析了在窃听者在场的情况下，使用友好的干扰器分析了可重构智能表面（RIS）辅助无线通信系统的保密性能。友好的干扰器通过向窃听者引入人造噪音而不会降低目的地的接待，从而增强了保密性。近似保密中断概率（SOP）以封闭形式得出。我们还为SOP提供了更简单的近似闭合形式表达式，以了解系统参数对性能的影响并找到发射机和干扰器的最佳功率分配。通过假设总功率限制，最大程度地减少SOP来得出最佳的传输和干扰功率分配因子。结果表明，通过引入干扰器，SOP的性能可显着提高，并且与等同功率分配的情况相比，通过最佳分配功率，以$ 10^{ - 4} $的SOP获得了大约3美元的增益。
This paper analyzes the secrecy performance of a reconfigurable intelligent surface (RIS) assisted wireless communication system with a friendly jammer in the presence of an eavesdropper. The friendly jammer enhances the secrecy by introducing artificial noise towards the eavesdropper without degrading the reception at the destination. Approximate secrecy outage probability (SOP) is derived in closed form. We also provide a simpler approximate closed-form expression for the SOP in order to understand the effect of system parameters on the performance and to find the optimal power allocation for the transmitter and jammer. The optimal transmit and jamming power allocation factor is derived by minimizing the SOP assuming a total power constraint. It is shown that the SOP performance is significantly improved by the introduction of the jammer and a gain of approximately $3$ dB is achieved at an SOP of $10^{-4}$ by optimally allocating power compared to the case of equal power allocation.
