雷利和激光向导恒星的比较,用于改善地面到GEO通信
Optics express
|February 20, 2026
概括
大气动荡会降低卫星通信的性能. 激光导向星 (LGS) 可实现上链预补偿,显著减少信号色和提高性能,特别是雷利 LGS.
科学领域:
- 光学工程是指光学工程.
- 天文学 天文学
- 航空航天工程 航空航天工程
背景情况:
- 大气动荡严重影响自由空间光学 (FSO) 卫星通信.
- 适应光学 (AO) 可以减轻流,但无星系主义限制了上链校正.
- 激光导向星 (LGS) 提供了一种用于预补偿的测量上链流的方法.
研究的目的:
- 调查基于LGS的预补偿对于上链FSO通信到地球静止卫星的有效性.
- 为了比较和雷利 LGS 在上链预补偿的性能.
- 通过使用错误预算和模型分析,在现实的大气动荡条件下评估性能.
主要方法:
- 模拟和分析了使用两种类型的天文LGS的上链预补偿策略:和雷利.
- 使用错误预算和模型分析评估系统性能.
- 在各种现实的大气流场景下模拟性能.
主要成果:
- 基于LGS的预补偿显著改善了合流量,与下行预补偿相比,大约减少了4dB的信号色.
- 一个高功率的LGS (80W) 产生更高的平均合流量.
- 一个功率较低的雷利LGS (15W) 在减少上链传输衰减方面表现相似.
结论:
- 使用LGS进行Uplink预补偿是克服卫星FSO中的大气动荡的可行策略.
- 雷利LGS相对于其可能的成本提供了显著的上升链性能改进,使其成为一个有前途的选择.
- 对Rayleigh LGS用于上链FSO通信的进一步研究是有必要的.
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