非对称空间统计信道模型及其MIMO多天线系统

非对称空间统计信道模型及其MIMO多天线系统

内容简介：针对在非均匀散射体分布以及非对称空间分布的移动通信环境，引入几何分割法导出基于散射体高斯分布的非对称空间统计信道模型。在指向性天线覆盖下的非对称宏小区和微小区以及街道和室内小区的移动通信环境下，模型能估计多径衰落信道的重要空时信道参数，如信号到达角度（AOA）、到达时间（TOA）概率分布密度函数以及到达信号的空时相关性。另外，在非对称空间统计信道下设置了MIMO多天线线性阵列（ULA）和圆环阵列（UCA），研究了此衰落信道的信道容量。通过信号的AOA和TOA概率密度函数的数值结果与多径衰落信道圆模型（GBSBM）的数值结果对比，表明本模型的信道参数估计结果符合实际的移动通信环境。假设非均匀散射体分布为高斯分布时，本模型的数值结果阐明了分布参数对信道参数的影响，拓展了空间统计信道模型的研究和应用，对评估MIMO多天线阵列系统空时处理算法和仿真无线通信系统提供了有力的工具。

Abstract：As for the mobile communication environment with non-uniform scatterers distribution and asymmetric spatial distribution,the asymmetric geometrical statistic channel model based on the Gaussian scatterers distribution was derived.In the communication environments of asymmetric mac-rocell,microcell and street and indoor cell geometry design covered by directional antenna,the im-portant space-time channel parameters of the multipath fading channel,such as the probability densi-ty functions of the angle of arrival (AOA),time of arrival (TOA)and the signal space-time corre-lation can be estimated by this model.In addition,in the asymmetric spatial statistic channel,we es-tablished the Multiple-Input Multiple-Output (MIMO)uniform linear array (ULA)and uniform cir-cular array (UCA)were estimated,and the channel capacity of the fading channel was studied. Comparing the statistic results of the probability density functions of AOA and TOA with those the geometrically based single bounce model (GBSBM),the results show that the channel parameters conform to realistic mobile communication environments.Assuming that the scatterer distribution is the Gaussian distribution,the statistical results of the proposed model illustrate the influence of the distribution parameters on the channel parameters,expanding the study and application of spatial sta-tistic channel models and providing powerful tools for the assessment of the MIMO array system space-time processing algorithm and the simulation of wireless communication systems.

作者：周杰, 曹志钢, 菊池久和,

关键词：非对称空间信道模型, 宏小区/微小区, 多输入多输出, 信道容量, 到达角度, 到达时间,