In the sixth generation (6G) wireless communication networks, ultra-massive multiple-input multiple-output (MIMO) communication is one of the most promising technologies. In ultra-massive MIMO channels, the mutual coupling (MC) effect is more obvious when antenna elements are more closely spaced. In this paper, a novel 6G space-time-frequency (STF) non-stationary massive MIMO channel model is proposed, which jointly considers MC, antenna efficiency, and near-field steering vectors of different antenna topologies. As the Shannon capacity theorem is based on the wide-sense stationary (WSS) channel assumption and cannot be applied to non-stationary channels, we propose a novel non-stationary channel capacity calculation method that divides the non-stationary channel into WSS sub-channels. Important statistical properties and channel capacities of the proposed channel model are derived and verified by ultra-massive MIMO channel measurements and data post-processing. The results show that the simulated spatial cross-correlation function (CCF) and channel capacity considering MC and antenna efficiency are closer to measured results. It also shows that antenna topologies have an impact on channel capacities. Furthermore, channel capacities using the proposed novel calculation method match the measured channel capacities in non-stationary channels.

中文翻译：

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考虑互耦的新型6G非平稳大规模MIMO信道模型的特性和信道容量研究


在第六代（6G）无线通信网络中，超大规模多输入多输出（MIMO）通信是最有前途的技术之一。在超大规模 MIMO 信道中，当天线单元间距越近时，互耦合 (MC) 效应越明显。本文提出了一种新颖的6G空时频（STF）非平稳大规模MIMO信道模型，该模型联合考虑不同天线拓扑的MC、天线效率和近场导向矢量。由于香农容量定理基于广义平稳（WSS）信道假设，不能应用于非平稳信道，因此我们提出了一种新颖的非平稳信道容量计算方法，将非平稳信道划分为WSS子信道。渠道。所提出的信道模型的重要统计特性和信道容量是通过超大规模 MIMO 信道测量和数据后处理得出和验证的。结果表明，考虑MC和天线效率的模拟空间互相关函数（CCF）和信道容量更接近测量结果。它还表明天线拓扑对信道容量有影响。此外，使用所提出的新颖计算方法的信道容量与非平稳信道中测量的信道容量相匹配。