卫星广播通信中的雨衰减研究及抗衰落策略

Research of Rain Attenuation and Solution in Satellite Communication

本文介绍了影响10GHz以上频段卫星广播通信系统面临的主要电波传播问题,重点介绍了无线电气象、雨衰减统计预报、雨衰减动态特性等方面的研究进展。基于我国统计数据建立的电波环境数字地图是进行可靠电波传播效应预测的基础,新提出的雨衰减统计预报模式具有更高的预测精度,基于我国站点实测数据建立的衰落斜率预报模型更能符合我国区域的电波传播特性。文章对当前主要的抗衰落策略进行了介绍和对比。在高频段卫星广播通信系统中更合理的利用电波传播研究成果,采用合理的抗衰落策略,可以优化系统设计和资源配置、提高系统性能。

The main radio propagation problems that impacts on satellite broadcasting communication systems operating at frequencies above about 10 GHz has been introduced. The advancement of radio meteorology, rain attenuation prediction and fade dynamics are proposed. The radio environment digital map based on statistical data collected in china makes the prediction of radio propagation effects more accurately. Results have showed that the precision of the new rain attenuation prediction model is higher, and the rain fade slope prediction model on the base of the date measured in specifi ed station is more suitable for the characteristics of radio propagation in China. A compare of main fade mitigation techniques are made here. A good use of the results of the research in radio wave propagation and the appropriate fade mitigation techniques will be helpful in satellite broadcasting communication systems worked at higher frequency. It also can optimize system design and resource confi guration and improve the system performance.