非互易动态超表面天线：用于多用户干扰抗性的实用多端口网络建模与优化
Non-Reciprocal Dynamic Metasurface Antenna: Practical Multiport-Network Modeling and Optimization for Multi-User Interference Resilience
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中文总结 AI 辅助
研究在基站部署非互易动态超表面天线克服信道互易性限制问题，用多端口网络理论建模，联合优化相关参数，实现不同信道响应，在高信噪比下比互易DMA基准提升FD和速率约60%，凸显相关优化的重要性。
中文摘要 AI 辅助
信道互易性由于多用户同信道干扰从根本上限制了全双工（FD）基站。我们研究了在基站部署非互易动态超表面天线（NR - DMA）以克服此限制的潜力。我们的NR - DMA架构将单个环行器连接到多馈源DMA的三个馈电端口，其七个馈源和96个1位可编程元单元之间存在强互耦（MC）。我们用多端口网络理论对系统建模，使用制造的19GHz DMA的实验估计代理参数和测量的环行器响应。通过对角可调散射矩阵捕获NR - DMA的可重构性，表明非互易DMA和RIS不需要“对角外”可调散射矩阵。我们联合优化DMA状态、模拟馈电权重、环行器端口分配和环行方向。优化后的NR - DMA实现了不同的正向和反向信道响应。在干扰受限的高信噪比案例研究中，NR - DMA比互易DMA基准将FD和速率提高了约60%。与代理目标和无MC感知优化的比较表明，端到端FD优化和MC感知建模都至关重要。
英文摘要
Channel reciprocity fundamentally limits full-duplex (FD) base stations due to multi-user co-channel interference. We examine the potential of deploying a non-reciprocal dynamic metasurface antenna (NR-DMA) at the base station to overcome this limitation. Our NR-DMA architecture connects a single circulator to three feed ports of a multi-feed DMA with strong mutual coupling (MC) between its seven feeds and 96 1-bit-programmable meta-elements. We model our system with multiport network theory, using experimentally estimated proxy parameters of a fabricated 19-GHz DMA and the measured circulator response. Our NR-DMA's reconfigurability is captured by a diagonal tunable scattering matrix, showing that non-reciprocal DMAs and RISs need not require a "beyond-diagonal" tunable scattering matrix. We jointly optimize the DMA state, analog feed weights, circulator-port assignment, and circulation direction. Our optimized NR-DMA realizes distinct forward and reverse channel responses. In our interference-limited high-SNR case study, the NR-DMA improves the FD sum rate by about 60% over a reciprocal DMA benchmark. Comparisons with proxy objectives and MC-unaware optimization show that end-to-end FD optimization and MC-aware modeling are both essential.
