NGSO通信星座系统间同频干扰场景与建模研究

doi:10.11959/j.issn.2096-8930.2021003

Abstract

Abstract:

Aiming at the serious problem of frequency overlapping among non-geostationary satellite orbit (NGSO) communication constellation systems.The potential interference scenarios under multiple NGSO communication constellation systems sharing the same spectrum band was comprehensively analyzed, with the aid of analyzing frequency plan of typical constellation systems.Then the possibility of interference risk in each scenario was qualitatively evaluated.According to the characteristics of interference scenarios, the key parameters and models for the co-frequency interference analysis between the NGSO communication constellation systems were discussed, and the computing models of co-frequency interference based on three diff erent protect criterion were presented.Finally, challenges and key research directions of co-frequency interference analysis between NGSO communication constellation systems were pointed out.The research can provide a reference for the study of compatibility and coexistence between broadband Internet constellation systems.

Key words: frequency resource, NGSO communication constellation system, co-frequency interference, interference scenario, interference evaluation criterion

CLC Number:

TN91

Wei LI, Kang YAN, Jingru GENG, Wen WANG. Research on Scenarios and Modeling of Co-Frequency Interference Between NGSO Communication Constellation Systems[J]. Space-Integrated-Ground Information Networks, 2021, 2(1): 20-27.

Figures/Tables 8

对比项	NGSO_A的信关站发射机	NGSO_A的卫星发射机	NGSO_A的用户终端发射机
	①信关站→信关站	②卫星→信关站	③用户终端→信关站
NGSO_B的信关站接收机	零干扰风险，除非双向使用频段（频段既可用作上行链路，也可用作下行链路）。即使频段被双向使用，风险也可忽略不计。因为信关站均处于地面，它们指向卫星的天线波束具有良好的角度分离，且信关站天线彼此可以保持足够的距离	有干扰风险，当NGSO_A的下行链路传输与NGSO_B信关站期望的下行链路传输共信道且波束对准时，NGSO_A对NGSO_B的接收造成干扰	零干扰风险，除非双向使用频段。即使频段被双向使用，风险也很小。因为信关站和用户终端都处于地面，它们指向卫星的天线波束具有良好的角度分离，但这取决于用户终端和信关站之间的距离
	④信关站→卫星	⑤卫星→卫星	⑥用户终端→卫星
NGSO_B的卫星接收机	有干扰风险，当NGSO_A的上行链路传输与NGSO_B卫星接收机期望的上行链路传输共信道且波束对准时，NGSO_A对NGSO_B的接收造成干扰	零干扰风险，除非频段被双向使用或一个系统使用FSS频段进行卫星间业务。风险有限，但当其他卫星系统试图增加星间链路，干扰风险将会增大	有干扰风险，当NGSO_A的上行链路传输与NGSO_B卫星接收机期望的上行链路传输共信道且波束对准时，NGSO_A对NGSO_B的接收造成干扰
	⑦信关站→用户终端	⑧卫星→用户终端	⑨用户终端→用户终端
NGSO_B的用户终端接收机	零干扰风险，除非双向使用频段。即使频段双向使用，风险也很小。因为信关站和用户终端都在地面，它们指向卫星的天线波束具有良好的角度分离，但这取决于从信关站到用户终端的距离	有干扰风险，当NGSO_A的下行链路传输与NGSO_B用户终端接收机期望的下行链路传输共信道且共线时，NGSO_A对NGSO_B的接收造成干扰	零干扰风险，除非双向使用频段。即使频段双向使用，风险也很小，因为用户终端都处于地面，因此它们指向卫星的天线波束具有良好的角度分离，但这取决于用户终端之间的距离

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星座名称	卫星数量/颗	轨道高度/km	申请频段
O3b	42	8 062	Ku/Ka
OneWeb	720	1 200	Ku/Ka/V
Starlink	4 409	550、1 110、550、540、560、570	Ku/Ka/V
Starlink	7 518	345.6、340.8、335.9	V
Kuiper	3 236	590、610、630	Ka
Telesat	117	1 000、1 248	Ka/V

建议书编号	描述
ITU-R P.341	无线电链路传输损耗概念
ITU-R P.525	自由空间衰减的计算
ITU-R P.526	绕射传播
ITU-R P.530	设计地面视距系统所需的传播数据和预测方法
ITU-R P.618	雨衰模型
ITU-R P.676	大气层衰减
ITU-R P.840	云雾模型
ITU-R P.619	对流层闪烁模型

Research on Scenarios and Modeling of Co-Frequency Interference Between NGSO Communication Constellation Systems

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