论文标题
关于相移设计和窃听不确定性对RIS AIDED系统保密指标的影响
On the Impacts of Phase Shifting Design and Eavesdropping Uncertainty on Secrecy Metrics of RIS-aided Systems
论文作者
论文摘要
本文研究了从信息理论的角度研究，可重新配置智能表面（RIS）辅助系统的保密中断概率（SOP），SOP的下限以及非零保密能力（PNZ）的概率。特别是，我们考虑了窃听器的位置不确定性和相调整不确定性的影响，即不完美的相干相位转移和RIS上离散的相位转移。更具体地说，提出了分析和仿真结果，以表明（i）反映元素数量的RIS逐渐减少而引起的SOP增益； （ii）这两个相位转移设计都表现出相同的PNZ保密性能，换句话说，随机离散相位转移的表现都超过了不完善的相干相位转移设计，并降低了复杂性。
This paper investigates the secrecy outage probability (SOP), the lower bound of SOP, and the probability of non-zero secrecy capacity (PNZ) of reconfigurable intelligent surface (RIS)-assisted systems from an information-theoretic perspective. In particular, we consider the impacts of eavesdroppers' location uncertainty and the phase adjustment uncertainty, namely imperfect coherent phase shifting and discrete phase shifting on RIS. More specifically, analytical and simulation results are presented to show that (i) the SOP gain due to the increase of the RIS reflecting elements number gradually decreases; and (ii) both phase shifting designs demonstrate the same PNZ secrecy performance, in other words, the random discrete phase shifting outperforms the imperfect coherent phase shifting design with reduced complexity.
