论文标题
在存在全跳窃听和不完美的CSI的情况下，基于双跳的无人机网络的物理层安全性
On the Physical Layer Security of a Dual-Hop UAV-based Network in the Presence of per-hop Eavesdropping and Imperfect CSI
论文作者
论文摘要
在本文中，分析了一个双跳无飞机的无线网络的物理层安全性，但要遵守不完美的通道状态信息（CSI）和移动性效应。具体而言，在两个wiretappers $ \ left（e_ {1}，e_ {2} \ right）的情况下，源节点$（s）$通过解码和前向继电器$（r）$与目标节点$（d）$通信。此外，发送节点$ \ left（s，r \右）$具有单个传输天线，而接收器$ \ left（r，d，e_ {1}，e_ {2} \ right）$配备了多个接收天线。根据关键系统参数，基于秘密截距概率（IP）度量的封闭形式表达式，根据关键系统参数，得出了秘密截距概率（IP）度量的闭合形式表达式。此外，在两种情况下，揭示了渐近表达式，即（i）具有不完美的CSI的移动节点和（ii）具有完美CSI的静态节点。结果表明，由于平均SNR的上限值的存在，在第一种情况下表现为零保密多样性顺序，而IP在第二个方面的高平均SNR线性下降，其中可实现的多样性顺序取决于淡出的淡出参数和合法链接/NODES的天线的数量。此外，对于静态节点，可以通过IP $ = 3 \ times10^{ - 3}的$ 15 $ db保密损失来谴责系统，当CSI不完美功率从$ 0 $ 0 $ 10^{ - 3} $时。最后，合法节点的速度，载体频率，延迟和/或中继的解码阈值SNR越高，系统的保密性越差。蒙特卡洛模拟认可派生的分析结果。
In this paper, the physical layer security of a dual-hop unmanned aerial vehicle-based wireless network, subject to imperfect channel state information (CSI) and mobility effects, is analyzed. Specifically, a source node $(S)$ communicates with a destination node $(D)$ through a decode-and-forward relay $(R)$, in the presence of two wiretappers $\left(E_{1},E_{2}\right)$ independently trying to compromise the two hops. Furthermore, the transmit nodes $\left(S,R\right) $ have a single transmit antenna, while the receivers $\left(R,D,E_{1},E_{2}\right) $ are equipped with multiple receive antennas. Based on the per-hop signal-to-noise ratios (SNRs) and correlated secrecy capacities' statistics, a closed-form expression for the secrecy intercept probability (IP) metric is derived, in terms of key system parameters. Additionally, asymptotic expressions are revealed for two scenarios, namely (i) mobile nodes with imperfect CSI and (ii) static nodes with perfect CSI. The results show that a zero secrecy diversity order is manifested for the first scenario, due to the presence of a ceiling value of the average SNR, while the IP drops linearly at high average SNR in the second one, where the achievable diversity order depends on the fading parameters and number of antennas of the legitimate links/nodes. Furthermore, for static nodes, the system can be castigated by a $15$ dB secrecy loss at IP$=3\times10^{-3},$ when the CSI imperfection power raises from $0$ to $10^{-3}$. Lastly, the higher the legitimate nodes' speed, carrier frequency, delay, and/or relay's decoding threshold SNR, the worse is the system's secrecy. Monte Carlo simulations endorse the derived analytical results.
