摘要
受周围环境特别是降雨的影响,卫星动中通(STOM)的通信链常常会发生信号衰减、甚至通信中断。针对这一问题,基于ITU-R模型分析并得到了Ka频段卫星通信链路雨衰预测结果。通过实验对比发现,相比于发射端,接收端受低链路降雨影响较小,动中通适用于接收端。分别研究了改变调制方式、编码方式、降低传输速率和选取高增益天线等4种降低雨衰影响方法,给出了不同降雨量下相应的有效解决策略,为动中通在不同降雨衰减环境下的链路设计及通信提供了技术支撑。
Because of the influence of the surrounding environment,especially rainfall,the communication link of STOM(Satcom on-the-move)often suffers from signal attenuation and even communication interruption.For this problem,the rain attenuation prediction result of the Ka-band satellite communication link is obtained by analyzing based on the ITU-R model.In addition,through the experimental comparison,it is found that the receiving end is less affected by the low link rain than the transmitting end,which illustrates that the communication on-the-move is more suitable for the receiver end.Finally,four methods to reduce the influence of rain attenuation,including changing the modulation method,encoding method,reducing transmission rate,and selecting high-gain antennas,are investigated respectively,and then corresponding effective solutions are given under different rainfalls.These provide technical support for the link design and communication in different rainfall attenuation.
作者
刘杉
江卫民
文郑杰
宋忠海
周伟
张建勋
LIU Shan;JIANG Weimin;WEN Zhengjie;SONG Zhonghai;ZHOU Wei;ZHANG Jianxun(Unit 96751,PLA,Dalian 116000,China;Rocket Force University of Engineering,Xi’an 710025,China)
出处
《无线电工程》
北大核心
2021年第4期259-263,共5页
Radio Engineering
基金
国家自然科学基金资助项目(61501469)。
