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多节点同载体合作传输在LEO通信网络:发展卫星的多样性增益

Tian Li¹, Guoyan Li¹, Xinwei Yue²

¹The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang 050081, China.

Sensors (Basel, Switzerland)

|July 27, 2024

概括

低地球轨道 (LEO) 卫星通信 (SATCOM) 的新合作传输战略提高了光谱效率. 直接组合 (DC) 提供了更高的总比率,而选择组合 (SC) 则提高了对重叠卫星覆盖的中断概率.

科学领域:

卫星通信卫星通信
无线网络无线网络.
信号处理信号处理

背景情况:

低地球轨道 (LEO) 卫星通信 (SATCOM) 网络正在成为增强陆地无线系统的关键技术.
利奥SATCOM具有重叠的覆盖区域,用户终端 (UT) 可以连接到多个卫星,从而实现多样性增长.
现有的方法可能无法充分利用LEO网络中多卫星连接的潜力.

研究的目的:

为LEO SATCOM提出和分析新的合作传输策略,以提高频谱效率和系统性能.
调查利用LEO卫星重叠光束区域多样性增益的方法.
评估不同合作策略之间的性能权衡,以总比率和中断概率为准.

主要方法:

提出了两种高频谱效率的合作传输策略:直接组合 (DC) 和选择组合 (SC).
开发了DC和SC的共同载波资源分配方案,考虑到光束中心和光束边缘之间的不同通道收益.
通过研究 ergodic 总率和中断概率,包括中断多样性增益,分析系统性能.

主要成果:

基于共同载体的DC方法在实现更高的ergodic总比率方面表现出卓越的性能.
关于中断概率,SC方法表现出更好的结果.
两种拟议的战略都有效地利用LEO SATCOM重叠区域的多节点多样性.

结论:

合作传输策略,特别是DC和SC,通过提高频谱效率和可靠性,为LEO SATCOM提供了显著的优势.
在DC和SC之间的选择取决于优先考虑的特定性能指标 (总比率与中断概率).
这些发现为未来LEO SATCOM系统的设计和优化提供了宝贵的见解.

关键词:

简单地说,LEO是通信网络中的一个.共同载体的传输输出合作式的传输方式.多重覆盖范围的多重覆盖范围

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