无线电通信技术2024，Vol.50Issue(5)：893-904,12.DOI:10.3969/j.issn.1003-3114.2024.05.007
近场信道建模与分析
Near Field Channel Modeling and Analysis
张琪 1窦建武 1张楠 1崔亦军1
作者信息
- 1. 移动网络和移动多媒体技术国家重点实验室,广东深圳 518055||中兴通讯股份有限公司,广东深圳 518057
- 折叠
摘要
Abstract
The evolution of the extremely large-scale antenna arrays has been achieved so far which is expected to be deployed in future wireless network,e.g.,in the middle frequency band and millimeter wave frequency band.Traditional far-field plane wave-front assumption will not applicable since the impact of near-field effect becomes more obvious and prominent along with the increased aper-ture size of antenna.To ensure the accuracy for performance evaluation of near-field communications,it is particularly important to es-tablish a channel model that reflects the characteristics of near-field channel.This paper first establishes a scattering model for general scatterers based on electromagnetic theory and physical optics.By studying the scattering characteristics of near-field scatterers,the variation characteristics of the Non-Line of Sight(NLoS)path channel and the Spatial Non-Stationary(SNS)characteristics in near-field region are analyzed.Then a near-field channel parameter generation method is designed based on the spatial consistency among the ele-ments in large antenna array and the scattering characteristics of scatterers.And an attenuation factor calculation approach is proposed to characterize the spatial non-stationary characteristics.Finally,a channel model suitable for near-field electromagnetic wave propaga-tion is propose based on the 3GPP standard channel modeling procedure.The channel model introduced in this paper simultaneously captures the impacts of spherical waves and spatial non-stationarity on near-field communication.This channel model can accurately e-valuate near-field communication performance and establishes a foundation for the development of near-field codebooks,beamforming,and other related technologies.关键词
近场/信道建模/散射模型/空间非平稳特征/空间一致性Key words
near field/channel model/scattering model/SNS characteristic/spatial consistency分类
电子信息工程引用本文复制引用
张琪,窦建武,张楠,崔亦军..近场信道建模与分析[J].无线电通信技术,2024,50(5):893-904,12.
