Ka频段卫星动中通链路雨衰预测与对策分析  

Rain Attenuation Prediction and Countermeasures Analysis for Ka-band SOTM Link

作　　者：刘杉[1] 江卫民 文郑杰 宋忠海 周伟[1] 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)

机构地区：[1]中国人民解放军96751部队,辽宁大连116000 [2]火箭军工程大学,陕西西安710025

出　　处：《无线电工程》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)。

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.

关 键 词：KA频段 雨衰 卫星动中通 链路余量 ITU-R模型 

分 类 号：TJ301[兵器科学与技术—火炮、自动武器与弹药工程]