一种基于几何统计的卫星移动MIMO信道模型

Modeling of Satellite Mobile MIMO Channel Based on Geometric Statistics

结合统计模型复杂度低和几何模型精确度高的优点,提出了一种基于几何统计的双极化卫星移动多输入多输出(MIMO)系统的信道建模理论。该模型总体上使用几何模型的建模思路,采用射线追踪方法对信道中传输的射线进行追踪,重点关注各条射线的各种小尺度参数,在实际计算中引入统计学方法对各种小尺度参数进行建模与处理,同时考虑信道环境造成的信号衰减以及信道环境对射线极化的影响,完成了信道模型的建立。根据已完成的建模理论,利用Matlab实现极化卫星移动MIMO信道的建模与仿真。通过与增强型统计模型仿真结果进行比较,得出了此几何统计模型是正确的,并可在一定程度上提高建模准确性的结论。

Based on the advantages of low complexity of statistical model and high accuracy of geometric model,a channel modeling theory of dual polarization satellite mobile MIMO system based on geometric statistics is proposed.In general,the model adopts the modeling idea of geometric model,uses ray tracing method to trace the rays transmitted in the channel,focuses on various small-scale parameters of each ray,introduces statistical method to model and process various small-scale parameters in actual calculation,and considers the signal attenuation caused by the channel environment and the influence of the channel environment on the ray polarization,thus completing the establishment of the channel model.According to the completed modeling theory,the Matlab is used to realize the modeling and simulation of polarization satellite mobile MIMO channel.In the experiment,various statistical characteristics of the channel calculated by the method are compared with the simulation results of the enhanced statistical model,and it is concluded that the geometric statistical model is correct and can improve the modeling accuracy to a certain extent.