论文标题
MIMO无线电源传输的关节波形和横梁成形优化
Joint Waveform and Beamforming Optimization for MIMO Wireless Power Transfer
论文作者
论文摘要
在本文中，我们研究了一个多功能多输入多输出（MIMO）无线电源传输（WPT）系统，其目的是增加输出直流电源。我们共同优化了对直径非线性的多丝波形和波束成形的核算，并考虑接收器处的直流体的两种组合方案，即DC和RF组合。对于DC组合，将波形和发射光束成型作为通道状态信息（CSI）的函数进行了优化。对于RF组合，最佳的传输和接收光束形式以封闭形式提供，并优化了波形。我们还考虑使用相位变速器和RF功率组合器的实用RF组合电路，并优化波形，传输光束形成，并且模拟接收到对CSI的光束形成。提供了两种类型的性能评估，基于非线性直流模型和准确而逼真的电路模拟。评估表明，关节波形和波束形成设计可以通过利用波束形成增益，频率多样性增益和直流非线性来提高输出DC功率。它还表明，关节波形和波束形成设计提供的DC功率比仅波束成形设计具有更高的输出功率，其相对增益在两种透射天线中的相对增益为180％，而两种触角则为16-Sinewave两种电波两电动天线设置。
In this paper, we study a multi-sine multiple-input multiple-output (MIMO) wireless power transfer (WPT) system with the objective to increase the output DC power. We jointly optimize the multi-sine waveform and beamforming accounting for the rectenna nonlinearity, and consider two combining schemes for the rectennas at the receiver, namely DC and RF combinings. For DC combining, the waveform and transmit beamforming are optimized, as a function of the channel state information (CSI). For RF combining, the optimal transmit and receive beamformings are provided in closed form and the waveform is optimized. We also consider a practical RF combining circuit using phase shifter and RF power combiner and optimize the waveform, transmit beamforming, and analog receive beamforming adaptive to the CSI. Two types of performance evaluations, based on the nonlinear rectenna model and accurate and realistic circuit simulations, are provided. The evaluations demonstrate that the joint waveform and beamforming design can increase the output DC power by leveraging the beamforming gain, the frequency diversity gain, and the rectenna nonlinearity. It also shows that the joint waveform and beamforming design provides a higher output DC power than the beamforming-only design with a relative gain of 180% in a two-transmit antenna sixteen-sinewave two-receive antenna setup.
