静止轨道卫星通信链路的预算与分析  

GEO satellite communication link budgets calculation and analysis

作　　者：徐挺 兰海 张宏江[3] XU Ting;LAN Hai;ZHANG Hongjiang(Lao Asia Pacific Satellite Co.,Ltd.,Vientiane 999012,Laos;Chongqing Liangjiang Satellite Mobile Communication Co.,Ltd.,Chongqing 401135,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]老挝亚太卫星有限公司,万象999012 [2]重庆两江卫星移动通信有限公司,重庆401135 [3]中国运载火箭技术研究院,北京100076

出　　处：《中国空间科学技术》2020年第3期83-92,共10页Chinese Space Science and Technology

摘　　要：星地链路计算作为卫星通信的重要技术,是卫星通信系统设计的基础和理论依据,直接决定了卫星通信系统的链路通信质量。由于影响卫星链路的因素很多,设计中存在一处不合理即使得整条星地链路不可用,造成巨大的损失。而且在实际设计中无法做到最理想的链路状态,往往需要在某方面有所取舍,这也是链路计算中的一大难点。基于目前国际通用的链路计算方法,将星地链路上下行拆分,独立计算,综合分析,再结合实际工程经验,分析和计算实际工程案例,针对不同的链路配置给出相应合理的设计方法,可作为静止轨道通信卫星星地链路计算分析的参考。As an important technology, satellite-ground link budget calculation is the theoretical basis of satellite communication system designing which directly decides the link availability. As there are many factors which may affect the satellite link, any unreasonable factor in the design would make the whole satellite-ground link unavailable and leads to a big loss. Moreover, there is no ideal satellite link situation unless overlooking some factors, which is also a difficulty during the link budget calculation. Based on the international common calculating method, GEO satellite link was analyzed thoroughly, separating the whole link into uplink and downlink. Then a practical example was analyzed and calculated according to the project experience in LAOSAT Company. At last, different reasonable designing methods in terms of different link configurations were obtained, which could be the references to link calculation and analysis of GEO satellite communication.

关 键 词：链路计算 卫星通信 工程案例 静止轨道 

分 类 号：TN927.2[电子电信—通信与信息系统]