微波动态雨衰减时间序列模型的修正

发布时间：2018-01-22 11:39

本文关键词： 微波传播雨衰减衰落统计　出处：《西安电子科技大学学报》2016年01期 　论文类型：期刊论文

【摘要】：为解决微波链路抗雨衰技术中动态雨衰减预测问题,利用增强MB模型模拟了中国典型的温带和亚热带雨区的12.5GHz雨衰减时间序列,并与实测雨衰序列的功率谱进行了比较,一致性很好,但降雨衰落斜率统计结果之间有差异.用循环插入法对增强MB的模拟进行修正,统计分析了雨衰落斜率和衰落持续时间的概率,结果显示,根据修正模拟数据与测量数据统计的衰落斜率有好的一致性,基于修正模拟数据的降雨衰落持续时间的统计也更接近于基于实测数据的统计结果和国际电信联盟无线电分委员会模型预测结果.表明该修正模型可用于中国典型雨区动态雨衰减的预测.
[Abstract]:In order to solve the problem of dynamic rain attenuation prediction in microwave link rain attenuation technology, a typical 12.5 GHz rain attenuation time series in temperate and subtropical rain regions in China is simulated by using the enhanced MB model. And compared with the measured power spectrum of rain decline sequence, the consistency is very good, but there are differences between the statistical results of rainfall decline slope. The cyclic interpolation method is used to modify the simulation of enhanced MB. The probability of the slope and duration of rain fading is statistically analyzed. The results show that the declination slope according to the modified simulation data is in good agreement with that of the measured data. The statistics of rainfall fading duration based on the modified simulation data are closer to the statistical results based on the measured data and the prediction results of the radio subcommittee model of the International Telecommunication Union. The results show that the modified model can be used in China. The prediction of dynamic rain attenuation in the rain region.
【作者单位】：西安电子科技大学物理与光电工程学院;中国电波传播研究所电波环境特性及模化技术重点实验室;
【基金】：国家自然科学基金资助项目(61179003) 电波环境特性及模化技术重点实验室专项资金资助项目
【分类号】：TN015
【正文快照】： 随着无线电通信、雷达等业务量的飞速发展,使得微波较低频段的频率资源日趋紧张,业务量趋于饱和,不得不开发更高的频率资源.然而,当无线电频率高于10GHz以上时,受大气和降雨的影响逐渐增强,尤其对于Ku、Ka及以上的毫米波频段,降雨的影响会愈来愈严重,不仅对地面视距传播的微波

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