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低地球轨道卫星的通信链路分析,考虑到沿着各种抛物线曲线的路径移动的干扰源
Hyunmu Kang1, Eunjung Kang2, Hosung Choo1
1Department of Electronic and Electrical Engineering, Hongik University, Seoul 04066, Republic of Korea.
Sensors (Basel, Switzerland)
|January 8, 2025
概括
本研究引入了一种使用抛物线路径和遗传算法 (GA) 的新方法,用于识别低地球轨道 (LEO) 卫星通信链路的关键干扰场景. 这种方法通过分析各种干扰源运动来增强防干扰系统的开发.
科学领域:
- 卫星通信 卫星通信
- 电磁学 电磁学 电磁学 电磁学
- 航空航天工程 航空航天工程
背景情况:
- 低空卫星通信链路很容易受到来自空中来源的干扰.
- 以前的分析经常使用简化直线路径干扰源,限制潜在威胁的范围.
- 了解关键干扰情况对于开发强大的防干扰系统至关重要.
研究的目的:
- 为了分析LEO卫星通信链路的脆弱性,考虑到空中源遵循抛物线路径的干扰.
- 确定关键干扰场景,其中干扰与信号 (J/S) 比率保持在特定值之内.
- 开发一种优化的方法,用于找到挑战通信链路的空中干扰源路径.
主要方法:
- 在东北向上 (ENU) 坐标系中建模卫星和空中干扰源轨迹.
- 使用抛物线方程来计算干扰源路径的方向与卫星轨道平行.
- 使用具有定义成本函数的遗传算法 (GA) 找到最佳干扰路径参数,最大限度地减少J/S比率偏差.
主要成果:
- 与直径相比,抛物线干扰路径揭示了更多的多样化和关键干扰情况.
- 该GA成功地确定了空中干扰源路径,这些路径保持了特定的J/S比率 (例如,高于-20dB),偏差最小.
- 通过将GA中的成本函数最小化来确定优化的干扰路径参数.
结论:
- 抛物线路建模和GA的结合提供了一种有效的方法,用于发现LEO卫星链路的显著干扰场景.
- 这种方法超越了使用直径的传统方法,因为它提供了对潜在干扰威胁的更全面的分析.
- 该研究为卫星通信中反干扰系统的运行和增强提供了有价值的数据库.
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