具有硬件损伤和非线性EH电路的节能安全WPCN
Power-Efficient and Secure WPCNs with Hardware Impairments and Non-Linear EH Circuit
摘要：
在本文中，我们设计了一个强大的资源分配算法的无线供电的通信网络（WPCN）考虑到剩余的硬件损伤（HWI）在收发器，信道状态信息的不确定性，和实际的射频能量收集电路的非线性。为了确保功率有效的安全通信，物理层安全技术被利用来故意降低多天线窃听者的信道质量。资源分配算法设计被公式化为非凸优化问题，用于最小化网络中的总消耗功率，同时在保密率方面保证信息接收器的服务质量。通过二维搜索和半定规划松弛，得到了优化问题的全局最优解。为了在计算复杂性和系统性能之间取得平衡，提出了一种低复杂度的迭代次优资源分配算法。数值结果表明，所提出的最优和次优方案都能显著降低系统在保证安全通信时所需的总功耗，并揭示了HWI对系统性能的影响：（1）在高发射/接收功率条件下，剩余HWI会造成系统性能瓶颈;（2）增加发射天线的数量可以有效地降低系统功耗，并缓解由于残留HWI而导致的性能下降;（3）不完善的CSI增加了系统功耗并加剧了剩余HWI的影响。
英文摘要：
In this paper, we design a robust resource allocation algorithm for a wireless-powered communication network (WPCN) taking into account residual hardware impairments (HWIs) at the transceivers, the imperfectness of the channel state information, and the non-linearity of practical radio frequency energy harvesting circuits. In order to ensure power-efficient secure communication, physical layer security techniques are exploited to deliberately degrade the channel quality of a multiple-antenna eavesdropper. The resource allocation algorithm design is formulated as a non-convex optimization problem for minimization of the total consumed power in the network, while guaranteeing the quality of service of the information receivers in terms of secrecy rate. The globally optimal solution of the optimization problem is obtained via a two-dimensional search and semidefinite programming relaxation. To strike a balance between computational complexity and system performance, a low-complexity iterative suboptimal resource allocation algorithm is then proposed. Numerical results demonstrate that both the proposed optimal and suboptimal schemes can significantly reduce the total system power consumption required for guaranteeing secure communication, and unveil the impact of HWIs on the system performance: (1) residual HWIs create a system performance bottleneck in the high transmit/receive power regimes; (2) increasing the number of transmit antennas can effectively reduce the system power consumption and alleviate the performance degradation due to residual HWIs; (3) imperfect CSI increases the system power consumption and exacerbates the impact of residual HWIs.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
