融合功率分配策略的NGSO-GSO频率干扰计算方法研究

Research on NGSO-GSO frequency interference calculation method fused with power allocation strategy

针对地球静止轨道(geostationary satellite orbit,GSO)卫星系统与非GSO(none GSO,NGSO)星座系统间的干扰分析场景,结合NGSO、GSO系统的空间链路、波束业务需求量和信道等特征,提出了融合功率分配策略的NGSO-GSO频率干扰计算方法,构建了上、下行通信链路的目标函数和约束条件。在以国际电联(International Telecommunication Union,ITU)实际登记的卫星网络资料为例构建的NGSO-GSO干扰分析场景中,计算并比较了典型功率分配策略对干扰噪声比I/N的影响效果。结果表明:在下行链路分析场景中,当GSO卫星系统和NGSO星座系统分别采用融合功率分配策略时,I/N超过限值-12.2 dB的时间百分比对应降低了0.24%~2.85%和0.77%~3.65%;但对于上行链路分析场景,融合功率分配策略对I/N超限百分比的降低作用不明显。

Aiming at the interference analysis scenarios between geostationary satellite orbit(GSO)system and none GSO(NGSO)constellation system,an interference calculation method fused with the power allocation strategy is proposed,considering the characteristics of space links,beam service requirements and channels of NGSO and GSO systems.The objective functions and constraint conditions of the uplink and downlink are constructed.In a typical NGSO-GSO interference scenario with the network data of satellites actually registered by the International Telecommunication Union(ITU),the effects of typical power allocation strategies on the interference-to-noise ratio I/N are calculated and compared.The results show that for the downlink scenario,the proposed method with the power allocation strategy reduces the time percentage when interference to noise ratio exceeds the-12.2 dB limit by 0.24%-2.85%for GSO systems,and 0.77%-3.65%for NGSO systems.However,for the uplink scenario,this method does not significantly reduce the time percentage.