LMDS系统雨衰特性研究

Research of the Characteristics of LMDS System Rain Attenuation

部署LMDS系统的目的在于突破对高速接入的限制,为最后一公里带来高容量及传输多种业务的能力。针对LMDS系统在传播路径中由于频率的升高而导致信号雨衰加大的现象,分析了雨衰的计算方法,对雨衰与距离和降雨强度的关系进行了仿真,归纳了现有的抗雨衰技术。

The purpose of the deployment of LMDS system is to break through the restrictions on high-speed access to result in the last mile capacity and high transmission capacity of a variety of business activities.In accordance with the dissemination of LMDS system in the signal path as a result of the increased frequency of decline caused by increased rainfall,the paper analyzes the calculation method rain attenuation,simulates the relationship between rain attenuation,distance and rainfall intensity and summarizes the existing anti-rain attenuation technology.