5G毫米波雨衰减链路传播模型及通信性能

Research on the propagation model and communication performance of the 5G millimeter wave at the rain attenuation link

针对第5代移动通信系统的全天候应用需求,提出了降雨环境下毫米波传播链路衰减率(特征衰减)和雨衰减信道状态的概率分布模型。采用K-S拟合优度检验方法,对北京、海口地区1951~2019年的降水观测数据资料进行统计计算分析,指出我国典型地区的降雨率分布特性更好的服从韦布尔分布。基于韦布尔降雨率分布和降雨衰减率的计算方法,推导给出了毫米波通信链路上雨衰减的概率密度函数模型。考虑毫米波在降雨信道的传播特性,根据得到的雨衰减概率密度函数模型,研究得到了雨衰减信道状态的概率分布函数模型,能有效的预测降雨环境下毫米波通信链路的信道衰减状态。进一步在M-QAM调制下,分析了毫米波通信降雨链路的平均误码率、信道容量和中断概率等。这对于毫米波通信网络在降雨环境下的推广和应用及电信运营商对链路的设计具有重要的实际价值。

For all-weather application requirements for 5 G communication systems,the probability distribution models of the attenuation rate(specific attenuation)on the MMW propagating link and rain attenuation channel state are proposed under rainfall environment.The observed rainfall data in Beijing and Haikou during 1951~2019 are statistically processed and analyzed by the K-S goodness of the fit test method,indicating that the rainfall rate distribution better obeys the Weibull distribution in typical areas of China.Based on the Weibull distribution of the rainfall rate and the calculation method for the rain attenuation rate,the probability density function model of rain attenuation on the MMW communication link is derived.Considering the propagation properties of millimeter waves in the rainfall channel,according to the rain attenuation probability density function,the probability distribution model of the rain attenuation channel state is obtained,which can effectively predict the channel attenuation state at the 5 G link under rainfall environment.Furthermore,the average BER,channel capacity and outage probability of MMW communication at the rainfall link are analyzed under M-QAM modulation,which is of great practical value to the promotion and application of the MMW communication network in rainfall environment and the link design of telecommunication operators.