采用可重构寄生天线的三混合SWIPT
Tri-Hybrid SWIPT with Reconfigurable Parasitic Antennas
AI总结：
该研究提出采用可重构寄生天线的三混合SWIPT预编码架构，整合多端口网络与信息论，结合CD、SVD、PPZF优化，利用耦合效应提升SE与NLHE，性能优于混合预编码且硬件成本更低。
摘要：
我们提出一种采用可重构寄生天线的、感知耦合的三混合预编码架构，用于同时进行无线信息与功率传输（SWIPT）。通过整合多端口网络理论与信息论，我们开发了第三层预编码，该层明确考虑天线域内的互耦与无功储能。为高效优化该架构，我们提出一种低复杂度的三混合解决方案，包含用于寄生无功负载优化的坐标下降（CD）、基于奇异值分解（SVD）的模拟预编码器，以及保护性部分迫零（PPZF）数字预编码器。数值结果表明，发射阵列会引入阻抗失配，降低天线阵列接收的有功功率；此外，所提三混合架构通过建设性利用耦合效应，显著优于混合预编码，在硬件成本仅为其一小部分的情况下，实现了频谱效率（SE）与总和非线性 harvested 能量（NLHE）的大幅提升。
英文摘要：
We propose a coupling-aware tri-hybrid precoding architecture for simultaneous wireless information and power transfer (SWIPT) using reconfigurable parasitic antennas. By integrating multiport network theory and information theory, we develop a third precoding layer that explicitly accounts for mutual coupling and reactive energy storage within the antenna domain. To efficiently optimize this architecture, we propose a low-complexity tri-hybrid solution comprising coordinate descent (CD) for parasitic reactive load optimization, a singular value decomposition (SVD)-based analog precoder, and a protective partial zero-forcing (PPZF) digital precoder. Numerical results demonstrate that the transmit array introduces impedance mismatch that reduces the real power accepted by the antenna array. Moreover, the proposed tri-hybrid architecture significantly outperforms hybrid precoding by constructively exploiting the coupling effects, yielding substantial gains in spectral efficiency (SE) and sum non-linear harvested energy (NLHE) at a fraction of the hardware cost.
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