基于被动测量的5G宽带高铁信道分簇模型  

Stochastic cluster models of wideband high-speed-train channel based on passive measurement in in-service 5G-NR networks

作　　者：侯绪艳 尹学锋[1] 张琳坚 HOU Xuyan;YIN Xuefeng;ZHANG Linjian(College of Electronics and Information Engineering,Tongji University,Shanghai 201804,China;Huawei Technologies Co.,Ltd.,Shanghai 201206,China)

机构地区：[1]同济大学电子与信息工程学院,上海201804 [2]华为技术有限公司,上海201206

出　　处：《电波科学学报》2021年第3期460-466,共7页Chinese Journal of Radio Science

基　　金：国家自然基金面上项目(61971313)。

摘　　要：为研究在高铁场景下的5G信道传播模型,设计了一款基于双通道的被动信道测量系统,并对运行速度约250 km/h的高铁进行了Sub-6 GHz频段的信道测量,建立了基于多径簇的信道模型.测量系统由双通道软件定义的无线电外设(software-defined radio,SDR)、高性能移动工作站和其他设备构成,可用于在服务中的5G新无线电(5G new radio,5G-NR)网络中精确地采集中心频率为2~4 GHz、带宽为100 MHz的5G下行链路信号.通过对不同类型下行链路信号的后处理,获得时延、多普勒频率和到达方向角的多维信道功率谱,以及多径分量的参数估计.最后通过对本文测量获得的5G-NR模型与现有的WINNER II模型进行对比分析,验证了本文模型在系统性能评估中的适用性.In this paper, a passive channel sounding system specifically designed for the 5G is used to conduct channel measurements on sub-6 GHz frequency bands in time-variant cases on high-speed-train with 250 km/h, and a based-cluster channel model based on measurement data is established. This passive channel sounder, built with dualchannel software-defined radio(SDR) peripherals, high-performance mobile workstation and other ancillaries, can be applied to collection of exact 5G downlink signals with center-frequencies of 2-4 GHz, bandwidth of 100 MHz in inservice 5G new radio(NR) networks. Based on post-processing of downlink signals of different types, multidimensional channel power spectra in delay, Doppler frequency and direction of arrival, as well as the estimates of parameters of multipath component(MPC) are obtained. A discussion of the difference between this new 5G-NR model and existing WINNER II model is provided and comments on the model applicability for system performance evaluation.

关 键 词：信道模型 多径簇 被动测量 KS-testing K-MEANS 高斯混合模型(GMM) 

分 类 号：TN928[电子电信—通信与信息系统]