Multiple satellites diversity characteristics in snowing climate and system application for 14/12 GHz band
Multiple satellites diversity characteristics in snowing climate and system application for 14/12 GHz band
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14/12 GHz频段降雪气候下多星分集特性及系统应用
DOI：
10.1109/aps.1998.701627
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
R. Mitsuhashi
中科院分区：
文献类型：
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作者：
N. Okuno;R. Mitsuhashi
本文研究了多卫星分集技术。D)在下雪气候下使用六颗不同轨道位置卫星的特点。通过频谱分析仪测量六个下行链路信号，并通过卫星获得分集增益。D模拟程序。分析了所有卫星组合的分集增益，可以清楚地看出存在两种分集特征，即良好的分集特征和较差的分集特征。这些结果是由于卫星转发器特性的不同、雪云运动的差异、地面站附近的地形条件和风向等因素造成的。此外，卫星转发器的利用策略也不尽相同。D系统。利用远距离站点分集的特点，可以实现系统中大量地面站之间的应答器共享。在这种情况下，只有一小部分的SAT。D个应答器(几乎10：1)对卫星来说是足够的。D系统。
This paper deals with multiple satellite diversity (Sat. D) characteristics using six different orbital position satellites in a snowing climate. Six down-link signals are measured by a spectrum analyzer and diversity gains are obtained by a Sat. D simulation program. Diversity gains for all satellite combinations are examined and it can be clarified that there are two kinds of diversity characteristics, i.e., a good diversity characteristics case and a poor diversity characteristics case. These results are caused by the difference in satellite transponder characteristics, differences in snow cloud movement, topographical conditions near the Earth-station and wind-direction etc. Furthermore, satellite transponder utilization strategies for the Sat. D system are considered. By using the advantage of long distance site-diversity characteristics, transponder sharing between a large number of Earth-stations in the system can be achieved. In this case, only a small number of the Sat. D transponders (almost 10:1) is sufficient for the Sat. D system.