非静止轨道卫星星座系统功率通量密度包络的计算方法  

Method to calculate the power-flux-density mask radiated by NGSO constellation system

作　　者：张晓燕[1] 刘畅[1] 李明明[1] 李伟[1] ZHANG Xiaoyan;LIU Chang;LI Mingming;LI Wei(State Radio Monitoring Center,Beijing 100037,China)

机构地区：[1]国家无线电监测中心,北京100037

出　　处：《电波科学学报》2021年第5期747-754,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金(91738101)。

摘　　要：新兴的非静止轨道(non-geo stationary orbit, NGSO)卫星星座由成百上千颗NGSO卫星编队组成,具有高动态的空间、时间、频谱、编码等多维一体特性,必然会对其他无线电系统(业务)带来时变的频率干扰问题,本文主要解决如何计算NGSO卫星星座系统下行链路的最大辐射能量问题.在ITU-R S.1503-3的计算框架下,通过引入卫星天线实际发射增益、波束配置与覆盖、用户点处最小隔离角的计算以及简化计算步骤等,给出了NGSO卫星星座系统功率通量密度(power-flux-density,PFD)包络的通用计算方法以及一个计算示例.通过分析可知,对所要仿真系统的各项参数,尤其是系统的切换策略、干扰规避或减缓策略等了解得越详细,得到的仿真结果就会越接近系统工作的真实值.本文的方法可用于计算任何NGSO卫星网络的PFD包络,以便参与下行等效PFD的计算.The emerging fleet of non-geo stationary orbit(NGSO) constellation is composed of up to thousands of NGSO satellites, with highly dynamic multi-dimensional characteristics such as in the domains of space, time,frequency spectrum, and coding, etc. Therefore, the time-varying interference is inevitably caused to other radio systems(or services) in the sharing frequency. The problem of how to calculate the maximum emission from the NGSO constellation is solved in this paper. The beam gain patterns of the NGSO system, the beam configuration and coverage,and the minimum separation angles at terminals(data points) are introduced on the basis of the calculation framework of ITU-R S.1503-3. The general method of the power-flux-density(PFD) mask can also simplify the calculation process.An example of PFD mask is simulated in this paper. It can be known from the analysis that the more detailed operating parameters of the system, especially such as the handover strategy, the interference avoidance or mitigation strategy to be obtained, the more accurate results can be simulated, which is closer to the real value of the system working. The method can be used to calculate the PFD envelope in order to participate in the calculation of the downlink equivalent PFD.

关 键 词：非静止轨道(NGSO)卫星 卫星星座系统 功率通量密度(PFD)包络 卫星固定业务 离散点 

分 类 号：TN927[电子电信—通信与信息系统]