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清华大学学报(自然科学版)  2022, Vol. 62 Issue (1): 172-178    DOI: 10.16511/j.cnki.qhdxxb.2021.21.034
  电子工程 本期目录 | 过刊浏览 | 高级检索 |
计算等效功率通量密度概率分布的方法
靳瑾1,2, 林子翘3, 晏坚1,2, 匡麟玲1,2
1. 北京信息科学与技术国家研究中心, 北京 100084;
2. 清华大学 信息科学与技术学院, 北京 100084;
3. 清华大学 电子工程系, 北京 100084
Calculational method for assessing the probability distribution of an equivalent power flux density
JIN jin1,2, LIN Ziqiao3, YAN Jian1,2, KUANG Linling1,2
1. Beijing National Research Center for Information Science and Technology, Beijing 100084, China;
2. School of Information Science and Technology, Tsinghua University, Beijing 100084, China;
3. Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
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摘要 等效功率通量密度(equivalent power flux density,EPFD)是衡量非静止轨道(non-geostationary orbit,NGSO)星座系统对静止轨道(geostationary orbit,GSO)星座系统干扰的一项重要评价指标,通常采用外推卫星轨道位置、统计不同EPFD值出现时间占比的方法获得其概率分布。对于如Starlink等的巨型星座,沿用传统外推方法计算EPFD存在仿真时间长、计算效率低等问题。为此,该文提出了一种计算EPFD概率分布的方法。通过在某一区域内不同位置放置基准卫星生成星座快照,以获取所以可能的卫星分布。同时,通过基准卫星的卫星出现概率表征快照概率,计算不同快照产生的EPFD,进而获得EPFD的概率分布。仿真结果表明,该文方法可同时适用于卫星数量较少的传统星座及超大规模的巨型星座,仿真结果与传统外推方法具有相同的准确度,但计算效率更高。
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靳瑾
林子翘
晏坚
匡麟玲
关键词 等效功率通量密度巨型星座干扰分析概率分布    
Abstract:EPFD (equivalence power flux density) is an important indicator for evaluating the interference of a NGSO (non-geostationary orbit) constellation system to a GSO (geostationary orbit) system. The EPFD probability distribution is usually obtained by extrapolating the satellite orbit position and compile statistics the occurrence time proportion of various EPFD values. For mega-constellation systems like Starlink, the traditional extrapolation method to calculate EPFD will involve long, inefficient simulations. This paper presents a simplified method to calculate the EPFD probability distribution. Constellation snapshots are generated by placing reference satellites at various locations in a region to obtain all possible satellite distributions. The snapshot probabilities are then characterized by the occurrence probabilities of the reference satellites, and the EPFD generated for various snapshots used to obtain the EPFD probability distribution. Simulations show that this method can be applied to both traditional constellations with fewer satellites and to mega-constellations. These simulations have the same accuracy as the traditional method, but with higher computational efficiencies.
Key wordsequivalent power flux density    mega-constellation    interference analysis    probability distribution
收稿日期: 2021-04-12      出版日期: 2022-01-14
基金资助:国家重点研发计划(2020YFB1804800);国家自然科学基金重大研究计划培育项目(91738101);上海市市级科技重大专项(2018SHZDZX04)
引用本文:   
靳瑾, 林子翘, 晏坚, 匡麟玲. 计算等效功率通量密度概率分布的方法[J]. 清华大学学报(自然科学版), 2022, 62(1): 172-178.
JIN jin, LIN Ziqiao, YAN Jian, KUANG Linling. Calculational method for assessing the probability distribution of an equivalent power flux density. Journal of Tsinghua University(Science and Technology), 2022, 62(1): 172-178.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2021.21.034  或          http://jst.tsinghuajournals.com/CN/Y2022/V62/I1/172
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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