Rain attenuation time series generator for medium Earth orbit links operating at Ka band and above
Rain attenuation time series generator for medium Earth orbit links operating at Ka band and above
复制标题
用于 Ka 频段及以上频段的中地球轨道链路的雨衰时间序列发生器
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Pantelis
中科院分区：
文献类型：
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作者：
C. Kourogiorgas;A. Panagopoulos;Pantelis
本文介绍了一种用于产生Ka波段及以上频率的地球-中地球轨道链路雨衰减时间序列的合成器。在寻找额外频谱时，地空链路通常采用20 GHz以上的高频段，雨衰减是一个重要的考虑因素，沿着采用自适应抑制技术来抑制雨衰减，因此，雨衰减时间序列的生成在自适应控制环的设计中具有重要意义。在这方面的贡献，随机微分方程（SDES）的基础上提出了一种方法，用于生成时间序列的雨衰减随时间变化的仰角的链接，如地球MEO链接。此外，一步一步的算法，以帮助用户的模型，以方便地产生这些时间序列。在数值结果部分，雨衰减的自相关函数（二阶统计量）的各种参数的链路，即仰角，频率，和气候参数进行了研究，此外，合成器进行验证，通过比较从合成器获得的雨衰减的预测概率（一阶统计量）的理论。
In this paper a synthesizer is presented for generating rain attenuation time series for Earth-MEO links operating at frequencies at and above Ka band. In the search of additional spectrum, Earth-space links resort to high frequency bands at 20 GHz or higher, where rain attenuation is a serious consideration along with adaptive mitigation techniques to mitigate it. Therefore, generation of time series of rain attenuation is of great significance in the design of adaptive control loop. In this contribution, a methodology based on Stochastic Differential Equations (SDEs) is presented for generating time series of rain attenuation for time-dependent elevation angles of the link, such as an Earth-MEO link. Furthermore, a step-by-step algorithm is given to aid the user of the model to easily generate these time series. In the numerical results section, both the autocorrelation function (second order statistics) of rain attenuation is investigated for various parameters of the link, i.e. elevation angle, frequency, and climatic parameters and moreover the synthesizer is validated by comparing the exceedance probability (first order statistics) of rain attenuation obtained from the synthesizer to the theoretical one.