新型动态簇非平稳MIMO信道模型与信道特性分析

针对传统移动-移动场景未能考虑阵列域和时间域双重非平稳特性,且不能模拟移动发射机和移动接收机间动态簇链路信道状态的问题,提出了一种新型三维动态簇非平稳多输入多输出(Multiple-Input Multiple-Output,MIMO)信道模型.该模型结合了天线阵列切换和收发端移动过程中信道非平稳特性,且利用生灭过程对非视距分量进行模拟.并针对径时延、径功率、径到达离开角等参数,对时空演进算法进行了改进.在小尺度角度参数谱服从Von Mise Fisher(VMF)分布情况的基础上,对时间和空间相关函数进行了推导.仿真结果表明,理论值与仿真值具有很好的拟合度,表明所提出的信道模型可以作为动态簇三维非平稳MIMO信道建模的设计方案.

A novel dynamic cluster non-stationary MIMO channel model and its channel characteristics analysis

In traditional mobile-mobile scenario,the dual non-stationary characteristics of the array domain and the time domain are not considered,where single or twin cluster link models are too simple to simulate actual scenarios.In this paper,a novel three dimensional(3D) dynamic cluster non-stationary multiple-input multiple-output(MIMO) channel model is proposed.the non-line-of-sight(NLOS) component is simulated by the birth-death process,which combines the non-stationary characteristics of the channel during the switching of the array antenna and the movement of the transceiver.Meanwhile,an array-time domain channel parameter evolution algorithm is applied to this new model,such as path delay,path power and arrival and departure angle.Based on the distribution of small-scale angle parameter spectrum obeying Von Mise Fisher(VMF),the temporal and spatial correlation functions of the model are deduced.Simulation results show an excellent agreement between the theoretical value and the simulation value,which indicates that the proposed channel model can be used as a design scheme for modeling dynamic cluster non-stationary MIMO channel.