陈立豪,刘亚南,张鹏,等. 面向巨型星座的干扰计算等效方法[J]. 电波科学学报,2023,38(4):721-728. DOI: 10.12265/j.cjors.2023051
      引用本文: 陈立豪,刘亚南,张鹏,等. 面向巨型星座的干扰计算等效方法[J]. 电波科学学报,2023,38(4):721-728. DOI: 10.12265/j.cjors.2023051
      CHEN L H, LIU Y N, ZHANG P, et al. Interference computation equivalent method for giant constellations[J]. Chinese journal of radio science,2023,38(4):721-728. (in Chinese). DOI: 10.12265/j.cjors.2023051
      Citation: CHEN L H, LIU Y N, ZHANG P, et al. Interference computation equivalent method for giant constellations[J]. Chinese journal of radio science,2023,38(4):721-728. (in Chinese). DOI: 10.12265/j.cjors.2023051

      面向巨型星座的干扰计算等效方法

      Interference computation equivalent method for giant constellations

      • 摘要: 低轨巨型星座规模较大,造成星座间的干扰场景复杂且干扰分析计算量较大,目前计算星座间干扰主要采用单点推演计算的方式,计算复杂度较高,无法满足当前巨型星座干扰计算时效性要求. 针对星座干扰计算中的集总干扰计算算法复杂度优化问题,提出了面向巨型星座的干扰计算等效方法:在链路构建方面,利用地面站视场内卫星空间分布特性,建立了星座链路选择等效模型,减少了链路选择的计算量;在单链路干扰计算方面,针对天线增益、传播损耗、极化隔离系数等参量的复杂计算,提出了巨型星座合计增益等效因子,降低了链路干扰计算复杂度. 以Starlink、OneWeb星座为例进行试验验证,结果表明所提方法可用于巨型星座低复杂度等效计算,与单点推演相比,算法复杂度降低了90%以上,有效提高了巨型星座频率兼容分析的时效性.

         

        Abstract: Due to the large scale and complex interference scenarios of the giant low-orbit constellation, in view of the high computational complexity of single-point deduction, which can not meet the current requirements of the timeliness of the interference calculation of the giant constellation, the complexity of the lumped interference calculation algorithm in the interference calculation of the constellation is targeted to be optimized, and the equivalent method of interference calculation for the giant constellation is proposed. In the aspect of link selection, the equivalent model of constellation link selection is established based on the spatial distribution characteristics of satellites in the field of view of the ground station, which reduces the calculation of the link selection method. In the aspect of single-link interference calculation, for the complex calculation of antenna gain calculation, propagation calculation, polarization isolation coefficient and other parameters, the total gain equivalent factor of giant constellation is proposed to reduce the complexity of single-link interference calculation. Taking Starlink and OneWeb constellations as examples, the experimental results show that the proposed method can be used for the low complexity equivalent calculation of giant constellations, with the complexity reduced by 90%, and effectively improve the timeliness of the frequency compatibility analysis of giant constellations.

         

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