Q/V频段5G基站对NGSO星座系统地球站的干扰分析

针对Q/V频段5G基站对非静止轨道(Non-geostationary Orbit,NGSO)星座系统地球站的同频干扰问题,提出了一种5G毫米波系统与NGSO星座系统下行链路间的干扰分析方法.结合NG-SO星座系统地球站天线指向的时变性,建立了基于时间离散的"拉远式"和"挖洞式"的动态干扰分析模型,并从强度和集总效应两个维度综合评估了系统之间的干扰情况.以OneWeb系统为例,仿真分析了不同保护距离下5G基站对OneWeb地球站的干扰情况.结果表明,在Q/V频段,当保护距离为50 m时,95％ 的时间内干扰余量不小于15.38 dB,5G基站与NGSO星座系统地球站有兼容共存的空间.

Interference of 5G base stations on earth stations of NGSO constellation system in Q/V band

For the co-frequency interference of 5G base stations on the earth stations of the non-geostationary orbit(NGSO) constellation system in Q/V band,a method for interference analysis between the 5G millimeter wave system and the NGSO constellation system is proposed for the downlink scenario.According to the time-varying characteristic of the earth station antenna pointing for NGSO constellation system,this method establishes the time-discrete pull-away and digging-based dynamic interference analysis models,and can evaluate the interference from the two dimensions of intensity and aggregate effect.By taking the OneWeb system as an example,the interference from 5G base stations to earth stations of the OneWeb system under different protection distances are studied.The results show that with the interference margin not less than 15.38 dB during 95% of the time,these two systems have considerable possibilities in coexistence in Q/V band when the protection distance is 50 meters.