基于随机模糊测度的高铁通信定向天线最优算法

Optimal algorithm of directional antenna for high-speed railway communication based on random fuzzy measure

高铁通信定向天线对无线铁路控制系统设计和性能分析有着重要影响。一个重要的特征是高速铁路通信是定向发射天线,接收机可能会遇到这些天线基座(BS)下视线路径(LOS)的强烈衰减,这导致了信号强度的强烈下降。首先定义BS底部区域,然后提出了针对高速铁路天线930MHz信号的随机模糊测度。结果发现BS的底部区域范围为400~800m;该阴影的标准偏差也遵循高斯分配;双指数模型的自协方差精度较好。最后,介绍了定向天线最优算法在高铁通信中的应用,并对其性能进行了仿真,验证了算法的性能。

High-speed railway communication directional antennas have an important impact on the design and performance analysis of wireless railway control systems.An important feature is that high-speed railway communications are directional transmit antennas,and receivers may encounter these line of sight(LOS)under the antenna base(BS),which leads to a strong decrease in signal strength.In this paper,we first define the bottom area of the BS,and then propose a random fuzzy measure for the 930 MHz signal of the high-speed railway antenna.The result shows that the bottom area of the BS ranges from 400 m to 800 m;the standard deviation of the shadow also follows the Gaussian distribution;the self-covariance accuracy of the double exponential model is better.Finally,this paper introduces.