5G系统对大规模NGSO卫星系统干扰分析等效建模方法

doi:10.12305/j.issn.1001-506X.2022.08.29

系统工程与电子技术 ›› 2022, Vol. 44 ›› Issue (8): 2635-2644.doi: 10.12305/j.issn.1001-506X.2022.08.29

5G系统对大规模NGSO卫星系统干扰分析等效建模方法

李灵慧^1,², 李伟³, 靳瑾^1,*, 匡麟玲¹

1. 清华大学北京信息科学与技术国家研究中心, 北京 100084
2. 清华大学电子工程系, 北京 100084
3. 国家无线电监测中心, 北京 100041

收稿日期:2021-07-14 出版日期:2022-08-01 发布日期:2022-08-24
通讯作者: 靳瑾
作者简介:李灵慧(1998—), 女, 硕士研究生, 主要研究方向为5G与卫星系统间干扰分析与减缓|李伟(1984—), 男, 高级工程师, 博士, 主要研究方向为空间通信系统的系统间频率兼容性分析和干扰管理|靳瑾(1985—), 男, 副研究员, 博士, 主要研究方向为航天任务设计、空间通信系统|匡麟玲(1973—), 女, 研究员, 博士, 主要研究方向为无线宽带通信、信号处理和卫星通信
基金资助:
国家重点研发计划(2020YFB1804800);国家自然科学基金重大研究计划培育项目(91738101);上海市市级科技重大专项(2018SHZDZX04)

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

Linghui LI^1,², Wei LI³, Jin JIN^1,*, Linling KUANG¹

1. Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing 100084, China
2. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
3. State Radio Monitoring Center, Beijing 100041, China

Received:2021-07-14 Online:2022-08-01 Published:2022-08-24
Contact: Jin JIN

摘要/Abstract

摘要：

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。

关键词: 大规模非静止轨道卫星系统, 5G系统, 集总干扰, 共存分析

Abstract:

In the coexistence scenario of the 5G 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 5G system base stations and users is large. Therefore, it is difficult to determine the actual location of the 5G system and the computation of interference will be increased significantly. This article takes the interference from 5G 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 5G system modeling, the distribution of 5G 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.

Key words: large-scale non-geostationary orbit satellite system, 5G system, aggregate interference, coexistence analysis

中图分类号:

TN927+.23

李灵慧, 李伟, 靳瑾, 匡麟玲. 5G系统对大规模NGSO卫星系统干扰分析等效建模方法[J]. 系统工程与电子技术, 2022, 44(8): 2635-2644.

Linghui LI, Wei LI, Jin JIN, Linling KUANG. Equivalent modeling method for interference analysis of 5G system to large-scale NGSO satellite system[J]. Systems Engineering and Electronics, 2022, 44(8): 2635-2644.

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轨道高度/km	倾角/(°)	卫星总数	星座划分
1 150	53	1 600	LEO1
1 110	53.8	1 600	LEO1
1 130	74	400	LEO2
1 275	81	375	LEO2
1 325	70	450	LEO2

轨道高度/km	倾角/(°)	轨道面数	卫星数/轨道面
1 130	53.5	64	50
1 250	78	25	49

系统	仿真参数
5G系统	频率/GHz	28.35
	工作带宽/MHz	200
	网络拓扑	城区、郊区
	基站分布密度/(个/km²)	城区: 30、郊区: 10
	基站调度用户数K	3
	基站天线高度/m	6
	用户天线高度/m	1.5
	扇区	单扇区
	下倾角/(°)	10
	网络负载因子	20%
	基站TDD激活因子	100%
	5G系统天线模式	参考ITU-R M.2101^[30]
	基站最大发射功率/(dBm 200 MHz^-1)	28
	用户最大发射功率/(dBm 200 MHz^-1)	22
	基站/用户天线阵元增益/dBi	5
	基站天线阵列配置(行×列)	8×8
	用户天线阵列配置(行/列)	4×4
	基站阵元水平/垂直3 dB波束宽度/(°)	65
	基站天线增益前后比/dB	30
	用户阵元水平/垂直3 dB波束宽度/(°)	90
	用户天线增益前后比/dB	25
	基站/用户水平/垂直辐射阵元间隔	0.5倍波长
	基站/用户天线阵列的欧姆损耗/dB	3
	用户设备的自身损耗/dB	4
	阴影衰落标准差/dB	4
	单阵元的传导功率/(dBm 200 MHz^-1)	10
	基站在水平面最大覆盖角度/(°)	120
NGSO卫星系统	GSO干扰规避策略	空域隔离(15°隔离角)
	卫星数	4 425
	频段	Ka
	频率/GHz	28.35
	工作带宽/MHz	464
	卫星波束参考数据库	STEAM-2UC423 R波束
	卫星天线峰值增益/dBi	42.3
	卫星天线口径/m	0.7
	卫星3 dB波束宽度/(°)	1.07
	卫星天线模式	REC-1528
	卫星噪声温度/K	496
	地球站天线高度/m	10
	地球站天线最低仰角/(°)	40
系统间干噪比	I/N限值/dB	-12.2
系统间干噪比	传播模型	ITU-R P.619、ITU-R P.2108

I/N	计算方法
I/N	外推1 d (5 s步长)	本文方法
最大值/dB	-19.34	-20.88
平均值/dB	-25.47	-25.38
超限百分比/%	0	0

方法	时长/s
外推1 d (5 s步长)	2 306
本文方法	542

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

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本文评价

I/ N	计算方法
I/ N	外推1d (5 s步长)	本文方法
最大值/dB	-23.80	-22.82
平均值/dB	-26.97	-26.91
超限百分比/%	0	0

I/N	本文方法
基站天线阵元/(行×列)	8×8	16×16
最大值/dB	-22.21	-18.73
平均值/dB	-27.50	-28.90
超限百分比/%	0	0