摘要
利用雨量计、频谱仪、计算机等设备,对武汉地区某时段降雨率和Ku频段卫星下行链路(12GHz)的降雨衰减进行了测量。通过数据处理,得到降雨率与降雨衰减的关系。经频率换算得到了相同条件下Ka频段卫星下行链路(20GHz)的降雨率与降雨衰减的关系。针对ITU-R预测模型的不精确性,根据频率换算值对预测模型进行修正。该换算值可为该链路Ka频段卫星通信抗雨衰方案的设计提供理论依据。
Rainfall rate and rain attenuation for the satellite downlink in Ku band（12GHz） in Wu- han are simultaneously measured by using rain gauge, stroboscope , computer and other equipments. The relation between rain attenuation and rainfall rate are presented through the procession of the da- ta. By frequency conversion, the relation of the rainfall rate and rain attenuation for the satellite downlink in Ka band（20GHz） are obtained in the same condition. Aimed at the inaccuracy of the ITU -R forecasting model, an modified algorithm by using the frequency conversion data. The con- version can provide the evidence for design anti -fade technology in Ka band satellite communication system.
出处
《无线通信技术》
2010年第2期37-40,共4页
Wireless Communication Technology
关键词
卫星通信
KA频段
降雨衰减
降雨率
satellite communication system
Ka band
rain attenuation
rainfall rate
