Performance Analysis for IRS-Assisted SWIPT with Optimal Phase Shift under Spatially Correlated Fading Channels
Performance Analysis for IRS-Assisted SWIPT with Optimal Phase Shift under Spatially Correlated Fading Channels
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DOI：
10.1109/vtc2023-spring57618.2023.10199889
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发表时间：
2023-06
期刊：
影响因子：
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通讯作者：
Masaaki Miura;Katsuya Suto;Koya Sato;O. A. López
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文献类型：
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作者：
Masaaki Miura;Katsuya Suto;Koya Sato;O. A. López
分析了具有最佳相移的智能反射面(IRS)辅助同时无线信息和功率传输(SWIPT)系统的性能。具体地说，我们考虑发射机借助IRS和空间相关衰落信道来发送功率和信息信号。在实践中，发射机和IRS之间以及IRS和接收机之间的信道在空间上是相关的，这对准确的性能分析构成了挑战。在该系统中，我们推导出了最佳相移，在该相移中，IRS处反射信号的主瓣指向接收器。然后，我们建立了一个封闭形式的表达式来估计平均收获能量和信息中断概率。通过蒙特卡罗模拟验证了该模型的有效性。
In this paper, we analyze performance of an intelligent reflecting surface (IRS)-assisted simultaneous wireless information and power transfer (SWIPT) system with the optimal phase shift. Specifically, we consider a transmitter sends power and information signals with the assistance of an IRS and spatially correlated fading channels. In practice, the channel between the transmitter and the IRS and between IRS and the receiver are spatially correlated, which constitutes a challenge for accurate performance analysis. In the system, we derive an optimal phase shift, in which the main lobe of the reflected signal at the IRS is directed to the receiver. Then, we develop a closed-form expression to evaluate the average harvested energy and information outage probability. We validate that the proposed model via Monte Carlo simulation.