标题：A Non-Stationary 3-D Wideband Twin-Cluster Model for 5G Massive MIMO Channels
作者：Wu, Shangbin;Wang, Cheng-Xiang;Aggoune, El-Hadi M.;Alwakeel, Mohammed M.;He, Yejun
作者机构：[Wu, S] Institute of Sensors, Signals and Systems, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kin 更多
通讯作者地址：[Wu, SB]Heriot Watt Univ, Sch Engn & Phys Sci, Inst Sensors Signals & Syst, Edinburgh EH14 4AS, Midlothian, Scotland.
来源：IEEE Journal on Selected Areas in Communications
关键词：Massive MIMO;3-D twin-cluster channel model;spherical wavefront;non-stationarity;birth-death process
摘要：This paper proposes a novel theoretical non-stationary three dimensional (3-D) wideband twin-cluster channel model for massive multiple-input multiple-output (MIMO) communication systems with carrier frequencies on the order of gigahertz (GHz). As the dimension of antenna arrays cannot be ignored for massive MIMO, near field effects instead of far field effects are considered in the proposed model. These include the spherical wavefront assumption and a birth-death process to model non-stationary properties of clusters such as cluster appearance and disappearance on both the array and time axes. Their impacts on massive MIMO channels are investigated via statistical properties including correlation functions, condition numbers, and angular power spectra. Additionally, the impact of elevation angles on correlation functions is discussed. A corresponding simulation model for the theoretical model is also proposed. Finally, numerical analysis shows that the proposed channel models are able to serve as a design framework for massive MIMO channel modeling.