发表机构
Nanjing University of Science and Technology; National University of Defense Technology（南京理工大学; 国防科技大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对相位调制MIMO信道，提出将信道矩阵酉变换为行阶梯形，转化为具有环形星座的标量子信道，并推导容量上下界，数值显示高信噪比下界间隙小。
AI 中文摘要
对于采用相位调制的多输入多输出（MIMO）信道，我们最近提出了一种将信道矩阵酉变换为某种行阶梯形的方法，通过该方法，原始MIMO信道可以转化为一定数量的具有两个相位输入的标量子信道，从而形成环形星座几何，并受到加性高斯白噪声和弱自干扰的污染。在本文中，推导了几个界限来评估这种特定收发器架构的基本极限。通过从凸几何的角度对具有环形支撑约束的标量信道的容量进行上界，得到了两个上界，而通过标准熵功率不等式得到了一个下界。数值结果表明，对于瑞利衰落上的MIMO相位调制信道以及由可重构智能表面辅助的单输入多输出共生通信系统，在高信噪比下这些界限之间的间隙很小。
英文摘要
For multiple-input multiple-output (MIMO) channels with phase modulation, we recently proposed a method of unitarily transforming the channel matrix into a certain row-echelon form, by which the original MIMO channel can be converted into a certain number of scalar sub-channels with two phase inputs, thereby forming an annulus constellation geometry, and corrupted by both the additive white Gaussian noise and weak self-interference. In this paper, several bounds are derived to evaluate the fundamental limit of such a specific transceiver architecture. Two upper bounds are obtained by upper-bounding the capacity of a scalar channel with an annulus support constraint from the perspective of the convex geometry, while a lower bound is obtained by the standard entropy power inequality. Numerical results show that the gaps between these bounds are small at high signal-to-noise ratios for the MIMO phase-modulated channels over the Rayleigh fading and the single-input multiple-output symbiotic communication system assisted by a reconfigurable intelligent surface.
