工业物联网中基于球面波的波束域信道建模  

Beam Domain Channel Model Based on Spherical Wavefront in Industrial Internet of Things

作　　者：钱昊 王勇 QIAN Hao;WANG Yong(Shool of Internet of Things,Jiangnan University,Wuxi 214122,China)

机构地区：[1]江南大学物联网工程学院,江苏无锡214122

出　　处：《无线电通信技术》2023年第3期472-477,共6页Radio Communications Technology

基　　金：中国科学院上海微系统与信息技术研究所无线传感网与通信重点实验室开放课题(20190917)。

摘　　要：随着天线阵列的增大,传统MIMO信道中的广义平稳(Wide-Sense Stationary, WSS)假设已失效,在大规模MIMO信道中,近场效应和非平稳性越发明显。针对波束域信道建模(Beam Domain Channel Model, BDCM)中尚未考虑到的大规模MIMO特性,将几何随机建模(Geometry-Based Stochastic Model, GBSM)中的天线域转换到波束域,提出了一个引入球面波假设的波束域信道模型。基于提出的模型,推导了时空相关函数(Spatial-Temporal Correlation Function, ST-CF),并研究了球面波假设对时空相关性的影响。通过波束扩展参数的模拟仿真表明,球面波假设下波束域信道模型具有良好的准确性。With the increase of antenna array,the Wide-Sense Stationary(WSS)assumption in traditional MIMO channel has failed.In the massive MIMO channel,near-field effect and non-stationary become more and more obvious.Aiming at the massive MIMO characteristics that have not been considered in Beam Domain Channel Model(BDCM),a novel BDCM with spherical wavefront assumption is proposed by transforming the Geometry-Based Stochastic Model(GBSM)from antenna domain to beam domain.Based on the proposed model,a Spatial-Temporal Correlation Function(ST-CF)is derived,and the influence of spherical wavefront assumption on the correlation functions is studied.Simulation results of beam spread show that the BDCM with spherical wave assumption possess good accuracy.

关 键 词：波束域信道建模 球面波 大规模MIMO 统计特性 

分 类 号：TN929.5[电子电信—通信与信息系统]