5G信道建模研究的进展与展望

Research on Channel Modeling for 5G:Current Status and Future Outlook

在移动通信中,信道的特性决定了移动通信系统的性能上限,而第五代移动通信(5G)信道模型就是5G系统设计与技术优化的基础。本文首先介绍了国家电信联盟(ITU)对5G的愿景,引出了5G在大带宽、多频点、空-时-频多维特性和复杂场景四个方面对信道建模的需求。其次,总结了课题组在5G信道建模研究的四维建模理论框架、高精度大带宽测量平台与应用场景、信道特性提取与建模三个方面的研究进展,着重分析了毫米波信道建模和大规模三维(3D)多输入多输出(MIMO)信道建模。最后,针对未来第六代移动通信(6G)的需求,展望了6G信道建模的四个研究方向,包括太赫兹信道建模、大维信道建模、天空地信道建模以及智能化信道建模。

In mobile communications,the characteristics of the channel determine the upper limit of the performance of mobile communication systems,and the fifth-generation mobile communication(5G)channel model is theoretically fundamental and vital for the design and optimization of 5G systems.In this paper,we first introduce the 5G vision given by the International Telecommunication Union(ITU),and then analyze the challenges to 5G channel modeling in terms of the bandwidth,frequency,channel characteristics,and test scenarios.Furthermore,we summarize the current status of research on 5G channel modeling from four aspects,including the theoretical framework,measurement platform and scenario,and channel characteristic analysis and modeling.Specially,we focus on our achievements of millimeter-wave channel modeling and massive three-dimensional(3D) multiple-input-multiple-output(MIMO) channel modeling. Finally, considering the needs of future sixth-generation mobile communications(6G),four research directions for 6G channel modeling are discussed,including terahertz channel modeling,large-dimensional channel modeling,space-air-ground channel modeling,and intelligent channel modeling.