星地一体化通信系统ATN终端卫星上行同频干扰

Analysis of interferences from ATN terminals to uplink satellite users in integrated satellite and terrestrial systems

星地一体化通信系统,是由基于多波束的卫星网络与地面辅助网络组成,它们共用一段频率。辅助地面网络的目的在于提高卫星波束在高密度人口区域的覆盖性能,这些区域中,卫星通信由于高楼而受到信号阴影衰减,地面ATC网络使用卫星频段,将会引起星地一体化系统内SBN与ATC相互干扰。为了分析更加准确的分析系统内同频干扰,在禁区和卫星波束频率复用的条件下,建立干扰源位置分布模型,并分析了ATN终端对卫星上行的同频干扰。

The term ＂integrated system＂ refers to a system composed of a multibeam Satellite Based Network and a Ancillary Terrestrial Network that reuses the same frequency band than satellite＇s ones.The terrestrial component aims at improving the satellite coverage in highly populated areas where satellite communications often suffer form a high blocking factor caused by the buildings,the ground ATN works in the satellite frequency,it will cause mutual interferences of satellite-terrestrial integrated system.In order to analyze more accurately the interferences of integrated system,under the condition of different exclusion zone（EZ） and satellite frequency reuse pattern（SFRP）,the location of interference sources is builded.This paper then precent the interference with uplink satellite users from ATN terrestrial users.