摘要
为满足MIMO信道的空、时、频特性对新型信道模型的需求,在基于散射体几何分布的单反射椭圆信道模型基础上,引入收发天线间的空间距离、俯仰角等空间矢量参数,构建了基于空间矢量、到达角和多径时延的三维MIMO椭球信道模型。推导出到达角与多径时延的联合概率分布函数表达式,推导出频率选择性衰落条件下模型的空、时、频相关函数表达式。仿真结果表明,提出的模型不仅兼容传统GBSBEM的特性,而且提高了后者的易用性和准确性,扩展其应用范围,适用于对MIMO无线通信系统的信号接收性能进行分析和评估。
The geometrically based single-bounce elliptical model （GBSBEM） does not consider the impact of time delay and pitch angle. In order to solve this problem, an improved three-dimensional space-time channel model based on GBSBEM is presented. By introducing spatial distance and pitch angle, this model transforms the 2D GBSBEM to 3D GBSBEM, which includes space distance, di- rection of arrival （AOA） and multipath time delay. And the probability density functions of the AOA, time delay and their joint are also derived. What is more, the joint space-frequency-time cor- relation functions of the model are given for the frequency-selected fading MIMO model. For illustra- tion, MATLAB simulation is utilized to show the feasibility and applicability of this 3D GBSBEM. The analysis results show that the improved model is not only compatible with the original model, but also able to improve the accuracy of the latter, and to extend the scope of its application. The im- proved model is more suitable for analyzing the signal reception performance of MIMO communica- tion systems.
出处
《信息工程大学学报》
2014年第2期187-192,共6页
Journal of Information Engineering University
作者简介
李明（1981-），女，博士生，主要研究方向为通信与信息系统，Email：dingdllm@gmail．com。
