多用户UWOC系统的全双联动动态TDMA方案和时钟同步和补偿方法
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|October 1, 2024
概括
我们为水下无线光通信 (UWOC) 开发了一种全双重动态时间分割多重访问 (FDD-TDMA) 方案. 这种FDD-TDMA系统实现了高数据速率,并改善了可变用户需求的吞吐量.
科学领域:
- 水下无线光学通信 (UWOC)
- 光学网络的光学网络
- 无线通信系统无线通信系统
背景情况:
- 水下无线光通信 (UWOC) 在实现高吞吐量和可靠的全双重通信方面面临挑战.
- 现有的时间划分多重访问 (TDMA) 方案可能无法有效地处理多个用户之间的可变通信需求.
研究的目的:
- 为多用户UWOC系统提出一种全新双重动态时间划分多重访问 (FDD-TDMA) 方案.
- 为了提高系统吞吐量,并在UWOC中实现精确的时钟同步.
- 在实践实验中证明拟议方案的有效性.
主要方法:
- 实现使用波长分割双重 (WDD) 的全双重通信方案.
- 动态时间资源分配以提高系统吞吐量.
- 开发和应用时钟同步和补偿方法,以实现精确的计时.
- 建立一个双用户的UWOC系统,使用开关键调制 (OOK).
主要成果:
- 在没有错误代码的情况下实现了25 Mbps的数据速率,在比特错误率 (BER) 低于前向错误纠正 (FEC) 限制的情况下达到40 Mbps.
- 与传统的TDMA相比,系统吞吐量显著改善,特别是在变化的用户需求下.
- 使用拟议的时钟同步方法,将相位偏差从微秒减少到十纳秒.
结论:
- 拟议的FDD-TDMA方案有效地支持全双重通信,并提高多用户UWOC系统的吞吐量.
- 时钟同步和补偿方法确保了精确的定时,这对于可靠的光通信至关重要.
- 在10米水池中的实验验证证证了系统的性能和实际应用的潜力.
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