摘要
雨衰的预测与计算是Ka频段卫星通信中的关键问题之一。分析了Ka频段DAH雨衰预测模型,归纳了DAH模型的计算步骤。基于维纳预测思想,提出了一种结构相对简单、计算量较小、易于迭代的新雨衰预测模型,给出了具体算法与步骤。仿真结果表明,新模型在水平、垂直和圆极化方式下具有与DAH模型几乎一致的变化特性,在不同地区也具有一致的预测效果,当阶数为2和3时,新雨衰预测模型与DAH模型最大偏差分别不大于0.065 dB和0.005dB。证明提出的新模型有效、算法简单,易于工程化。
The prediction and calculation of rain attenuation is one of the key problems of satellite communication in Ka - band. The model of DAH rain attenuation prediction in Ka - band is analyzed and its calculation procedure is summed up. Based on Wiener prediction, a new predictive model of rain attenuation, which enjoys the advantages of relatively simple structure, the ease of iteration and simple calculation amount, is established. Its concrete algorithm and procedure are also given. The simulation results show that the characteristics of this mew model are almost the same as those of DAH model under horizontal, vertical and circular polarized modes, The predictions in different regions are also consistent. The maximum deviations between this new model and DAH model are no more than 0.065 dB and 0.005 dB respectively when the orders are 2 and 3. These demonstrate that the new model proposed is available for use, effective, simple in algorithm and easy to be applied in engineering.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2010年第5期60-64,共5页
Journal of Air Force Engineering University(Natural Science Edition)
基金
陕西省自然科学基金资助项目(2009JM8001-3)
关键词
KA频段
雨衰
DAH模型
维纳预测
Ka band
rain attenuation
DAH model
Wiener prediction
