The role of rain in satellite communications
The role of rain in satellite communications
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DOI：
10.1109/proc.1975.9940
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发表时间：
1975-09
影响因子：
20.6
通讯作者：
David C. Hogg;T. Chu
中科院分区：
文献类型：
--
作者：
David C. Hogg;T. Chu
在设计10 GHz以上频率的卫星通信系统时遇到的最根本的障碍是雨水的衰减。由于受到一次可用功率和卫星天线尺寸等因素的限制，目前的技术水平不足以克服强降雨对地-空路径产生的巨大衰减，从而造成信号的损失，造成传输的不可靠。在下文中，提出了在各种频率下测量这种衰减的方法和实质上提高可靠性的称为路径分集的技术。雨产生的其他退化，如去极化，干扰，地球站噪声的增加，地球站天线性能的恶化，也进行了讨论。
The most fundamental obstacle encountered in design of satellite communication systems at frequencies above 10 GHz is attenuation by rain. The microwave power radiated toward an earth station, being limited by factors such as available primary power and size of antenna on the satellite, is insufficient, with present technology, to overcome the large attenuation produced by intense rain cells on the earth-space path. The resultant loss of signal makes for unreliable transmission. In what follows, methods of measurement of this attenuation at various frequencies and a technique called path diversity that substantially improves the reliability are presented. Other degradations produced by rain, such as depolarization, interference, increase in earth-station noise, and deterioration of earth-station antenna performance, are also discussed.