概括
本研究介绍了一种混合的自由空间光学/无线电频率卫星系统,使用差异混沌转移键和Bose-Chaudhuri-Hocquenghem编码. 该系统通过减轻大气影响来提高卫星-地面通信可靠性.
科学领域:
- 卫星通信 卫星通信
- 光学无线通信的无线通信.
- 信息理论 信息理论
背景情况:
- 卫星-地面通信链接面临大气动荡和恶劣天气带来的挑战.
- 现有系统在各种环境条件下经常难以保证可靠性.
- 需要混合方法来提高通信的稳定性.
研究的目的:
- 提出和分析一个混合的自由空间光学 (FSO) /无线电频率 (RF) 卫星-地面通信系统.
- 整合差异混沌转移键化 (DCSK) 调制和Bose-Chaudhuri-Hocquenghem (BCH) 编码,以提高性能.
- 评估系统对大气影响和各种操作参数的弹性.
主要方法:
- 在高空平台 (HAP) 上使用并行FSO和射频传输与最大比率组合 (MRC).
- 采用Fischer-Snedecor F分布的模拟FSO链接和使用Nakagami-m分布的RF链接.
- 导出了BCH编码的DCSK调制系统的比特误差率 (BER) 表达式,并执行了蒙特卡洛模拟.
主要成果:
- 混合FSO/RF系统有效地减轻大气动荡和恶劣天气影响.
- 分析考虑了诸如到达角度波动,指向错误和大气衰减等因素.
- 模拟显示了调制,编码和环境参数对系统性能的影响.
结论:
- 拟议的混合FSO/RF卫星-地面通信系统,采用BCH-DCSK技术,表现出卓越的性能.
- 该系统为卫星-地面上链通信提供了更高的可靠性.
- 结果为未来的实验验证提供了理论基础.
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