低复杂度连贯的DSCM系统,具有精确的收发器IQ偏差校准和简化的等分,嵌入相位跟踪
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|November 27, 2024
概括
本研究介绍了一种低复杂度的方法,用于在数字子载波复杂化 (DSCM) 连贯系统中校准收发器IQ偏差. 新的方法实现了与复杂的MIMO等分器可比的性能,计算负载减少.
科学领域:
- 光学通信是指光学通信.
- 数字信号处理 数字信号处理
- 一致的系统 一致的系统
背景情况:
- 数字子载波复杂化 (DSCM) 是连贯光学系统的一个有前途的技术.
- 在DSCM系统中,收发器IQ偏差会导致对称子载体 (SC) 中的并联干扰.
- 现有的校准方法,如MIMO,是计算密集的.
研究的目的:
- 为连贯的DSCM系统开发一种低复杂度的收发器IQ偏差校准方法.
- 为了减少计算复杂性,提出了一种带有嵌入式相位跟踪 (SEQPT) 的简化等效器.
- 通过实验验证拟议的方法.
主要方法:
- 专门设计的训练信号用于收发器IQ偏差校准,避免了MIMO操作.
- 建议采用嵌入式相位跟踪 (SEQPT) 的简化等分器来实现极化去复杂化,通道等分和相位噪声补偿.
- 在使用50 GBd 4SC-16QAM DSCM信号的16通道WDM系统中进行实验验证.
主要成果:
- 拟议的斜度校准方法实现了与8x8实值MIMO等分器可比的性能.
- SEQPT同时提供两极分化去复杂化,通道均化和相位噪声补偿.
- 与传统均衡器相比,SEQPT的性能处罚最小,同时保持低复杂度.
结论:
- 拟议的低复杂度偏差校准方法有效地减轻了DSCM连贯系统中的IQ偏差问题.
- SEQPT提供了一种有效的解决方案,用于等级和相位噪声补偿,减少计算负载.
- 这些进步有助于更实用和高效的连贯DSCM系统设计.
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