5G系统对大规模NGSO卫星系统干扰分析等效建模方法

Equivalent modeling method for interference analysis of 5G system to large-scale NGSO satellite system

在5G系统和大规模非静止轨道(non-geostationary orbit, NGSO)卫星系统的同频共存场景中,NGSO系统的星座规模大且具有动态时变性,5G系统基站和用户数量众多,存在难以确定5G系统实际位置以及干扰计算量较大等问题。本文以5G系统对NGSO系统的干扰为例分析了建模方法,在对卫星星座建模时,利用划分星座子空域方法减少干扰计算量,在对5G系统建模时,依据聚类方法以及全球城市人口数量,使5G系统热点区域分布符合城市发展现状,并利用辐射能量计算方法减少干扰计算量。仿真结果表明,与传统外推方法对比,本文方法具有相似的准确度,并且可以大幅提高计算效率。

In the coexistence scenario of the 5 G system and the large-scale non-geostationary orbit(NGSO) satellite system at the same frequency, the constellation of the NGSO system is large in scale and dynamically time-varying, and the number of 5 G system base stations and users is large. Therefore, it is difficult to determine the actual location of the 5 G system and the computation of interference will be increased significantly. This article takes the interference from 5 G system to NGSO system as an example to analyze the modeling methods. For satellite constellations modeling, the method of dividing the constellation subspace is used to reduce the computation. For 5 G system modeling, the distribution of 5 G system hotspots will be in line with the current status of urban development based on the clustering method and the global urban population, and then the computation reduction would be achieved by adopting the method of the radiation energy calculation. Compared with the traditional extrapolation method, the simulation results show that the method in this article has similar accuracy to it and can greatly improve the calculation efficiency.