具有发射端多端口匹配网络的MISO系统的可达速率分析
Achievable-Rate Analysis of MISO Systems with Transmit-Side Multiport Matching Networks
AI总结：
研究具有发射端多端口匹配网络的MISO系统在多端口博德-法诺约束下的可达速率上界，基于电路理论模型和方向增益概念揭示其与通信性能的关系，推导最优传输系数结构并开发修复方法，为MMN设计提供指导，数值结果验证有效性。
AI中文摘要：
表征射频前端电路物理约束下的通信性能对于弥合通信理论分析与实际电路设计至关重要。本文研究了具有发射端互连多端口匹配网络（MMN）的多输入单输出（MISO）系统在多端口博德-法诺约束下的可达速率上界，并开发了一种面向速率的MMN电路实现方法。首先基于电路理论通信模型和多变量控制理论中的方向增益概念，揭示MMN功率传输的方向特性与无线传播相互作用影响通信性能。然后在此方向增益解释基础上，重新表述表征可达速率上界的矩阵值函数优化问题并推导最优传输系数结构。还开发了一种贪婪约束修复方法以获得可行的次优解。最后通过面向速率的MMN电路实现方法表明，所推导的理论见解为实际MMN设计提供有效指导。数值结果验证了可达速率上界的理论分析及所提MMN电路实现方法的有效性。
英文摘要：
Characterizing communication performance under the physical constraints imposed by radio frequency front-end circuits is essential for bridging communication-theoretic analysis and practical circuit design. In this work, we investigate the achievable-rate upper bound of a multiple-input single-output (MISO) system with a transmitter-side interconnected multiport matching network (MMN) under multiport Bode--Fano constraints and develop a rate-oriented MMN circuit realization method. First, based on a circuit-theoretic communication model and the concept of directional gain from multivariable control theory, we reveal how the directional characteristics of MMN power transmission interact with wireless propagation to affect communication performance. Then, building on this directional-gain interpretation, we reformulate the matrix-valued functional optimization problem that characterizes the achievable-rate upper bound and derive the optimal transmission-coefficient structure. Further, a greedy constraint-wise repair method is developed to obtain a feasible suboptimal solution. Finally, through a rate-oriented MMN circuit realization method, we demonstrate that the derived theoretical insights provide effective guidance for practical MMN design. Numerical results validate the theoretical analysis of the achievable-rate upper bound and the effectiveness of the proposed MMN circuit realization method.
