450MHz频段卫星气象业务与铁路列调系统干扰共存分析

选取450MHz附近频段为典型研究频段,对该频段Argos系统卫星气象业务和铁路列调系统进行干扰共存分析.针对气象卫星对火车、气象卫星对火车站、火车站对气象卫星地球站、火车对气象卫星地球站这4种可能存在的干扰情况,使用实际系统参数以及天线方向图,结合Argos气象卫星的轨道特征,分析了干扰共存下需要的隔离距离和气象卫星地球站的协调区域.最后给出了仿真结果,得出4种干扰情况下的隔离度和隔离距离.

Interference Coexistence Evaluation for Satellite Meteorological Service and Railway Train Dispatching System

Interference coexistence of satellite meteorological service in Argos system and railway dispatching system was studied in the spectrum bandwidth around 450MHz.Focusing on the possible interference in four cases,the interference from meteorological satellite to the train,the interference from meteorological satellite to the railway station,the interference from railway station to the meteorological satellite earth station,the interference from train to the meteorological satellite earth station.The realistic system parameters and radiation pattern were used,combined with track characteristics of Argos meteorological satellite to analyze the isolated distance needed and the coordination area around meteorological satellite earth station.Simulations demonstrate the isolation degree and the isolation distance of the four kinds of interference conditions.