Co-Frequency Interference Analysis Between Ultra-Large-Scale NGSO Constellations and GSO Systems  

作　　者：Ying Huang Shilin Li Wei Li Weijun Lu Xueling Zhang 

机构地区：[1]State Radio Regulation of China,Beijing 100037,China.

出　　处：《Journal of Communications and Information Networks》2023年第1期80-89,共10页通信与信息网络学报（英文）

基　　金：the Beijing Natural Science Foundation.L222003;the National Key Research and Development Program.2020YFB1806100。

摘　　要：The rejuvenation of non-geostationary orbit(NGSO)satellite communication holds the promise of seamless and ubiquitous broadband access from the space.However,the NGSO constellations must share the scarce radio spectrum resources with geostationary orbit(GSO)satellite systems,which results in dynamically changing and unevenly distributed interference to GSO systems.In this context,the ultra-large-scale NGSO constellation incurs a more complicated interference environment with GSO systems,which raises urgent demands on inter-system interference evaluation.In this case,we investigate the inter-system downlink interference from a NGSO satellite mega-constellation to a GSO earth station.Specifically,we consider the scenario where the NGSO and GSO earth stations are co-located,and apply a novel visibility analysis method in the interference modeling to reduce computation redundancy.The interference evaluation is then performed through comprehensive simulations,in which the Starlink constellation with more than 4000 satellites is examined for the first time.The simulation results demonstrate various states of interference on the GSO earth station at different deployment locations.It reveals that the number of visible satellites could influence the angle between the main lobe directions of NGSO satellites and the GSO earth station antenna,which further affects the interference level.

关 键 词：NGSO interference analysis visibility analysis mega-constellation satellite communication satellite network 

分 类 号：TN929.5[电子电信—通信与信息系统]