无线电工程

雨衰是高频段(Ka、V等)卫星通信链路传输损耗中的一个重要因素。在进行系统工程设计时,低可用度系统需要预留一定的雨衰余量,高可用度系统需要采取自适应抗雨衰措施。卫星通信向高频段发展是未来趋势,因此,有必要研究雨衰的动态特性,为抗雨衰技术的有效性设计提供依据。介绍了雨衰的动态特性和国内外的一些研究成果,并结合我国某地实测数据进行了分析。

Rain attenuation is the dominant propagation impairment in satellite communication with higher band(Ka,V).For system design,it is necessary to provide certain link margin for low availability.However in order to obtain high availability,we need explore adaptive fade mitigation technology.It is the trend to use higher band in satellite communication system.So it is necessary to study the fade dynamic characteristics of rain and to provide the evidence for design anti-fade technology.In this paper,Fade dynamic characteristics of rain and some results are also presented.Lastly,data from propagation experiment of some city in our country are analyzed.