| 摘要: |
| 在当前多波束通信卫星的波束设计中，波束一般按照频率和极化关系构成波束组（网元）进行管理，而在当前网元的构型设计当中，网元波束之间往往存在地理耦合性强的特点，即在每一个网元之中，波束地理聚集性强、重叠度高，因而影响了区域服务保障的可靠性并且导致单网元工作下的波束覆盖面积有较多重叠，进而制约了多波束卫星系统的整体覆盖效能。针对该问题，构建了以单网元波束覆盖性能均质优化为思路的组合优化问题以重构网元波束构型方案，并设计基于模拟退火算法的优化方法进行最优方案求解。在该方法中，针对多波束重叠覆盖区面积计算复杂度高的难点，设计了基于重要性采样的蒙特卡罗方法进行估算。通过以天通卫星为例进行算法性能验证，新型网元波束构型方案下，单个网元的波束分布具有地理分散均匀的特点，波束之间的重叠度明显减小，最差波束覆盖面积提升37%，平均波束覆盖面积提升28%。 |
| 关键词: 多波束卫星 波束组 网元波束构型 均质优化 模拟退火算法 |
| DOI：10.20079/j.issn.1001-893x.230131003 |
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| 基金项目: |
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| Construction Design of Beam Groups in Multi-eam Satellites Based on Average Optimization of Covering Performance |
| ZHAO Xu,WANG Lei,ZHANG Xinjun,HAO Liyun |
| (Beijing Space Information Transmission Center,Beijing 100086,China) |
| Abstract: |
| In the beam design of multi-eam communication satellite,the beams are usually controlled by groups defined as the network elements according to the frequency and polarization.However,the current network elements are always coupled with beams geographically,which influences the reliability of regional service and results in much covering overlapping of the beams in one network element,thereby limiting the overall covering ability of the multi-eam communication satellite.To address this problem,the authors constructs an optimization problem derived from the idea of optimizing averagely the covering performance among the different network elements,and obtain an optimal construction scheme of beams and network elements through the simulated annealing algorithm.Through the algorithm performance validation on the TianTong system,the beams of each network element are distributed evenly in the whole area and the overlapping is decreased effectively. The worst covering area and the average covering area of one network element are improved by 37 |
| Key words: multi-eam satellite beam group network element beam configuration homogeneous optimization simulates annealing algorithms |
