论文标题
梁空间多路复用：实践，理论和趋势从4G TD-LTE，5G到6G及以后
Beam-space Multiplexing: Practice, Theory, and Trends-From 4G TD-LTE, 5G, to 6G and Beyond
论文作者
论文摘要
在本文中，对于以前的多层波束形成了3GPP释放的4G TD-LTE的新术语，即梁空间多路复用。我们从工程和理论角度提供了梁空间多路复用的系统概述。首先，我们阐明了梁空间多路复用的基本理论。具体而言，我们在理论分析，渠道状态信息获取和工程实施约束方面提供了与天线空间多路复用的全面比较。然后，我们总结了4G TD-LTE和5G新无线电（NR）的梁空间多路复用的关键技术和3GPP标准化，分别分别在多层边缘成形和巨大的光束形成方面。我们还提供了梁空间多路复用方案的系统级性能评估，并提供了当前商业TD-LTE网络和5G现场试验的现场结果。 4G TD-LTE和5G蜂窝网络的实际部署在实现复杂性和实际部署方案的局限性内显示了梁空间多路复用的优势。最后，讨论了6G及以后的横梁空间多路复用的未来趋势，包括大规模的大规模MIMO（XL-MIMO），低地球轨道（LEO）卫星通信，数据驱动的智能大规模波束形成和多目标空间信号处理，即，关节交流和感觉，即，即，智能大规模光束，
In this article, the new term, namely beam-space multiplexing, is proposed for the former multi-layer beamforming for 4G TD-LTE in 3GPP releases. We provide a systematic overview of beam-space multiplexing from engineering and theoretical perspectives. Firstly, we clarify the fundamental theory of beam-space multiplexing. Specifically, we provide a comprehensive comparison with the antenna-space multiplexing in terms of theoretical analysis, channel state information acquisition, and engineering implementation constraints. Then, we summarize the key technologies and 3GPP standardization of beam-space multiplexing in 4G TD-LTE and 5G new radio (NR) in terms of multi-layer beamforming and massive beamforming, respectively. We also provide system-level performance evaluation of beam-space multiplexing schemes and field results from current commercial TD-LTE networks and field trial of 5G. The practical deployments of 4G TD-LTE and 5G cellular networks demonstrate the superiority of beam-space multiplexing within the limitations of implementation complexity and practical deployment scenarios. Finally, the future trends of beam-space multiplexing in 6G and beyond are discussed, including massive beamforming for extremely large-scale MIMO (XL-MIMO), low earth orbit (LEO) satellites communication, data-driven intelligent massive beamforming, and multi-target spatial signal processing, i.e., joint communication and sensing, positioning, etc.
