雨衰条件下卫星信道容量的性能分析

An Analysis of Satellite Channel Capacity for Performance under Conditions of Rain Attenuation

雨衰是导致Ka频段(20/30GHz)卫星链路信号衰落的主要原因。目前,多数降雨补偿算法从功率和带宽应用的角度出发建立在固定衰落门限基础上,这会导致不能充分利用信道容量。以卫星信道通信容量的最佳利用为基础,对雨衰条件下Ka频段通信容量的性能进行了讨论,在分析的基础上,得出了一些有意义的结论。

Rain attenuation is the dominant cause of leading up to the signal degradation in satellite links operation at Ka - band. Presently, most of rain compensation algorithms come from the aspect of the application of power and bandwidth and are based on the use of a fixed, large fade margin in combating the occasional deep fades. However, such use of a fixed margin, especially for a rainy region, results in an inefficient use of channel capacity. Therefore, based on the effective utilization of the channel capacity, the paper discusses the performance of satellite channel capacity in the Ka - band in the presence of rain attenuation, presents some useful results on the basis of analysis.