1668～1675 MHz卫星移动系统与无线电探空系统间的共存研究

Study on Coexistence between Mobile Satellite System and Radiosonde System in 1668～1675 MHz

为分析在1668--1675 MHz频段引入卫星移动系统的可行性,对该频段卫星移动系统与无线电探空系统间的兼容共存问题进行了深入分析。介绍了两个无线系统的基本特征和主要参数,讨论了两系统间潜在的干扰链路。针对卫星移动业务终端对二次测风雷达的干扰以及二次测风雷达对卫星空间电台的干扰两条主要干扰链路,采用计算机静态建模和蒙特卡洛仿真方法,对干扰情况进行了计算仿真。仿真结果表明,在卫星终端密度在50个/km2时,二次测风雷达所需的保护距离为60~80 km,而单个二次测风雷达主瓣方向发射二次测风雷达的功率高于空间卫星国际保护标准达60 d B。该研究结果可为我国无线电管理部门对该频段的重新规划提供支撑。

In order to analyze the feasibility of introducing mobile satellite system in 1668- 1675 MHz band, compatibility and coexistence analysis between mobile satellite system and radiosonde system are given in detail. The basic characters and main parameters of these two radio systems are introduced, then the potential interference paths between these two systems are discussed. For two interference paths of satellite terminals to secondary wind-finding radar and secondary wind-finding radar to satellite, simulation and calculation are carried out by adapting computer static modelling method and Monte Carlo method. Simulation results show that there must be 60 -80 km protection distance to secondary wind-finding radar when satellite terminal density is 50/kin2 and the power from main lobe of the radar to satellite exceeds the international standard more than 60 dB. The conclusion can be used to support frequency replanning by national radio management department.