对于具有侧音调制的LEO卫星的综合通信和导航测量信号设计
Xue Li1, Yujie Feng2, Linshan Xue3
1Ctr Commun and Tracking Telemetry Command, Chongqing University, Chongqing 400044, China.
Sensors (Basel, Switzerland)
|September 27, 2025
概括
这项研究将直角频率分割多重复合 (OFDM) 信号与侧信号集成,用于增强低地球轨道 (LEO) 卫星通信和精确的距离测量. 这种新型系统提高了效率和准确性,减少了电力需求,提高了射程精度.
科学领域:
- 卫星通信系统 卫星通信系统
- 信号处理 信号处理
- 航空航天工程 航空航天工程
背景情况:
- 传统的低地轨道 (LEO) 卫星系统面临复杂性,资源浪费和干扰的挑战,原因是单独的通信和测量功能.
- 整合通信和距离功能对于提高LEO卫星系统的效率至关重要.
研究的目的:
- 提出一个集成的直角频率分割多重复合 (OFDM) 信号系统,将侧信号结合起来,用于LEO卫星的通信和精确测量.
- 解决系统复杂性,资源浪费和传统LEO卫星系统中的干扰问题.
主要方法:
- 采用OFDM技术,使用多频侧信号和短周期 coprime 伪随机代码进行复合范围代码.
- 实施双模式通道估计算法,将距离飞行员和侧信号的结果合并.
- 采用自适应范围模式切换机制,以平衡范围精度和光谱效率.
主要成果:
- 在6dB的信号噪声比率 (SNR) 中,实现了大约10-3的位误差率,与传统方法相比,减少了3dB的传输功率.
- 获得了大约0.02米的厘米级距离精度,比传统的飞行员方法改进了3-4个数量级.
- 通过集成道估计和自适应范围,显著提高了系统性能.
结论:
- 拟议的综合系统为LEO卫星通信和距离提供了高精度,高效的解决方案.
- 该系统有效地降低了位误差率和传输功率,同时显著提高了距离精度.
- 未来的工作应该包括全面的错误建模,以考虑硬件缺陷和环境变化.
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