论文标题
多源无线电源传输的时间划分能量范围，并通过非线性能量收获
Time-Division Energy Beamforming for Multiuser Wireless Power Transfer with Non-Linear Energy Harvesting
论文作者
论文摘要
能源波束成形已成为一种有前途的技术，用于提高无线功率传递（WPT）的能量传递效率。但是，由于非线性射频（RF）到能量接收器（ERS）的直流电流（DC）转换，传统能量波束形成的性能可能会严重降低。 To tackle this issue, this letter proposes a new time-division energy beamforming, in which different energy beamforming matrices (of high ranks in general) are time shared to exploit the "convex-concave" shape of the RF-DC power relation at ERs.通过考虑WPT的特定时间持续时间，我们通过共同优化能量波束成形矩阵和相应的时间分配来最大化所有ERS之间的最小收获直流能量。为了解决非Convex Min-DC-能量最大化问题，我们通过使用交替优化和连续的凸近近似（SCA）的技术提出了有效的解决方案。数值结果表明，所提出的时间划分的能量波束形成的设计确实优于常规的多光束和时间划分 - 元素访问（TDMA）基于基于的能量传输。
Energy beamforming has emerged as a promising technique for enhancing the energy transfer efficiency of wireless power transfer (WPT). However, the performance of conventional energy beamforming may seriously degrade due to the non-linear radio frequency (RF) to direct current (DC) conversion at energy receivers (ERs). To tackle this issue, this letter proposes a new time-division energy beamforming, in which different energy beamforming matrices (of high ranks in general) are time shared to exploit the "convex-concave" shape of the RF-DC power relation at ERs. By considering a particular time duration for WPT, we maximize the minimum harvested DC energy among all ERs, by jointly optimizing the energy beamforming matrices and the corresponding time allocation. In order to solve the non-convex min-DC-energy maximization problem, we propose an efficient solution by using the techniques of alternating optimization and successive convex approximation (SCA). Numerical results show that the proposed time-division energy beamforming design indeed outperforms the conventional multi-beam and time-division-multiple-access (TDMA)-based energy transmissions.
