arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.01696eess.SP
收藏

可重构智能表面辅助恒包络无线功率传输

Reconfigurable Intelligent Surface Aided Constant-Envelope Wireless Power Transfer

Huiyuan Yang, Xiaojun Yuan, Jun Fang, Ying-Chang Liang

摘要:

可重构智能表面(RISs)通过人工重构电磁波的传播环境,被认为是提高无线网络能量和频谱效率的一种有前途的革命性硬件技术。在本文中,我们研究了RIS辅助的多用户多输入单输出(MISO)无线电能传输(WPT)系统,其中发射机配备了恒定包络模拟波束形成器。我们制定了一个新的问题,以最大限度地提高所有用户的总接收功率,通过联合优化波束形成器在发射机和在RIS的相移,受个人的最小接收功率约束的用户。我们进一步迭代地解决问题,每一步都有一个封闭形式的表达式。数值结果表明了部署RIS的性能增益和所提出的算法的有效性。

英文摘要:

By reconfiguring the propagation environment of electromagnetic waves artificially, reconfigurable intelligent surfaces (RISs) have been regarded as a promising and revolutionary hardware technology to improve the energy and spectrum efficiency of wireless networks. In this paper, we study a RIS aided multiuser multiple-input single-output (MISO) wireless power transfer (WPT) system, where the transmitter is equipped with a constant-envelope analog beamformer. We formulate a novel problem to maximize the total received power of all the users by jointly optimizing the beamformer at transmitter and the phase shifts at the RISs, subject to the individual minimum received power constraints of users. We further solve the problem iteratively with a closed-form expression for each step. Numerical results show the performance gain of deploying RIS and the effectiveness of the proposed algorithm.

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。

↑