摘要
利用电波雨衰模型对Ka频段卫星通信链路雨衰影响进行了分析,得出上行链路采用水平极化、下行链路采用垂直极化方式,可有效降低链路降雨衰减影响,上下行链路相互干扰最小的结论。提出的上行链路实时动态补偿,下行链路固定补偿的雨衰补偿方法,简化了卫星控制。给出的利用下行链路雨衰信息,设置阈值和注入信号的上行链路雨衰补偿流程,补偿精度高,解决了非降雨因素链路电平变化带来的雨衰误补偿问题。
The radio wave rainfall attenuation model was used to analyze the influence of rain attenuation on Ka band satellite communication links.It shows that the uplink should be in horizontal polarization and the downlink in vertical polarization.By this way,it can reduce the influence of rain attenuation at most and interferences between uplink and downlink will be the least.It was presented that the real-time dynamic rain attenuation compensation should be employed on the uplink and the fixed rain attenuation compensation on the uplink.This can simplify the satellite control.By using rain attenuation information of the downlink,setting compensation limit and injecting signal compensation flow,the wrong compensation induced by factors other than rainfall can be sovled and a high compensation precision can be got.
出处
《中国空间科学技术》
EI
CSCD
北大核心
2010年第3期55-62,共8页
Chinese Space Science and Technology
关键词
雨衰减
KA频段
补偿卫星通信
Rain attenuation Ka band Compensation Satellite communication
