39GHz室外微蜂窝信道测量、建模与仿真研究

Millimetre-wave channel measurements,modeling and simulation for outdoor microcells at 39GHz

基于39GHz室外微蜂窝场景实测数据,开展了毫米波段路径损耗、阴影衰落和大尺度参数的建模与仿真研究.介绍了毫米波段喇叭旋转测量系统下空间交替广义期望最大化(Space-Alternating Generalized Expectation-maximization,SAGE)算法信号模型,优化的分簇算法与莱斯因子计算方法.基于SAGE提取多径参数,利用优化的分簇算法提取并分析了簇参数,包括簇内角度扩展、簇内时延扩展以及簇的数目,并根据测量结果验证了第三代合作伙伴计划(The 3rd Generation Partnership Project,3GPP)第五代(the 5th Generation,5G)移动通信标准推荐的仿真平台准确定性无线信道产生器(Quasi-Deterministic Radio Channel Generator,QuaDRiGa)在39GHz的可用性.结果表明:在视距径下,方向性路损和全向路损在固定截距和浮动截距两种拟合方式下与自由空间路损模型接近;大尺度参数统计特性与基于毫米波的第五代集成通信移动无线电接入网络(Millimetre-Wave Based Mobile Radio Access Network for Fifth Generation Integrated Communications,mmMAGIC)、3GPP结论接近;视距径与非视距径的簇参数差别较小,且簇的个数较6GHz下的频段更少.本文为5G毫米波39GHz频段信道仿真和系统设计提供了重要的信道模型和参数.

In this paper, based on an outdoor microcell channel measurement campaign at 39 GHz, the path loss model, shadow fading and other large-scale parameters（LSP） in mm-wave band are studied. The signal model by using space-alternating generalized expectation-maximization（SAGE） for directional-scansounding measurement and modeling is introduced. Moreover, an optimized clustering algorithm and Ricean K-factor extraction method are also proposed. Multipath parameters are extracted by SAGE, and then we use the optimized clustering algorithm to get cluster level parameters, including cluster delay spread, angle spread and number of clusters. The quasi-deterministic radio channel generator （QuaDRiGa） platform recommended as the 5th generation（5G）mobile communication simulator by the 3rd generation partnership project （3GPP） is verified at 39 GHz by measurements. The results show that the directional and omni-directional path loss models in line-of-sight （LOS） scenarios is close to free space when using both the fixed and floating intercept path loss models. The statistical results for LSPs in this work agree well with the results in millimeter-wave based mobile radio access network for fifth generation integrated communications （mmMAGIC） and 3GPP. Differences between cluster level parameters in the LOS and non-LOS route are not significant, but the number of clusters is much smaller compared to carrier frequency below 6 GHz. Useful channel models and parameters are offered in this work for 5G radio system simulations and design at 39 GHz.