论文标题
通过离散阶段控制的RIS辅助通信的安全中断分析
Secure Outage Analysis of RIS-Assisted Communications with Discrete Phase Control
论文作者
论文摘要
该通信调查了具有安全威胁的可重构智能表面（RIS）辅助无线通信系统。部署RIS以增强发送给合法用户的数据的保密中断概率（SOP）。通过在合法用户和Eavesdropper中得出接收到的信噪比（SNRS）的分布，我们以封闭形式的表达式制定了在RIS离散相位控制的约束下对SOP的紧密绑定。 SOP的特征是天线元素数量的函数，$ n $和离散阶段选择的数量，$ 2^b $。据透露，当$ b \！\ geq \！3 $时，由于离散相位控制而导致的SOP的性能损失是可忽略的。此外，当使用$ b \！= \！1 $时，我们会明确量化此SOP损失。可以确定，将RIS天线元件增加1.6美元的$ times可以通过与RIS具有理想的连续相移的RIS实现相同的SOP。进行数值模拟以验证这些理论观察的准确性。
This correspondence investigates a reconfigurable intelligent surface (RIS)-assisted wireless communication system with security threats. The RIS is deployed to enhance the secrecy outage probability (SOP) of the data sent to a legitimate user. By deriving the distributions of the received signal-to-noise-ratios (SNRs) at the legitimate user and the eavesdropper, we formulate, in a closed-form expression, a tight bound for the SOP under the constraint of discrete phase control at the RIS. The SOP is characterized as a function of the number of antenna elements, $N$, and the number of discrete phase choices, $2^b$. It is revealed that the performance loss in terms of SOP due to the discrete phase control is ignorable for large $N$ when $b\!\geq\!3$. In addition, we explicitly quantify this SOP loss when binary phase shifts with $b\!=\!1$ is utilized. It is identified that increasing the RIS antenna elements by $1.6$ times can achieve the same SOP with binary phase shifts as that by the RIS with ideally continuous phase shifts. Numerical simulations are conducted to verify the accuracy of these theoretical observations.
