车载非静止轨道卫星监测系统链路计算

Calculation of Communication Link for Vehicle-mounted NGSO Satellite Monitoring System

非静止轨道(NGSO)卫星通信发展迅猛,但由于相关设备的缺乏,对其下行信号频率轨道资源占用情况监测较少,因此,设计NGSO监测系统为当前急需解决的问题。设计车载监测系统要求具有低的余量,而当前卫星监测系统通信链路计算过程考虑不够精确,文章通过研究ITU相关建议书,考虑NGSO通信链路中存在的大气、雨水、云层和电离层闪烁等相关因素,计算在特定接收余量下的车载监测系统地空链路损耗,为该系统设计提供更精确的依据,同时对GSO链路设计也具有参考意义。

The non geostationary orbit(NGSO)satellite communication is developing rapidly,but due to the lack of related equipment,the monitoring of its downlink signal frequency orbit resource occupation is less.Therefore,the design of NGSO monitoring system is an urgent problem to be solved,and the current calculation process of satellite monitoring system communication link is not accurate enough.In this paper,through the study of ITU recommendations,considering the atmosphere,rain,cloud,scintillation and other related factors in NGSO communication link,the link loss vehicle monitoring system under a specific reception margin is calculated,which provides a more accurate basis for the system design and also has reference signifi cance for the GSO link design.