概括
这项研究介绍了一种混合单载波 (SC) 和直角频率分割多重复合 (OFDM) 系统,使用三角信号调制 (DSM) 进行先进的光通信. 这种新的方法实现了高光谱效率,降低了复杂性和噪声,满足了预期错误校正值.
科学领域:
- 光学通信是指光学通信.
- 信号处理 信号处理
背景情况:
- 高级方程振幅调制 (QAM) 提高了光学传输能力,但面临着噪声,非线性和成本方面的挑战.
- 在连贯光学系统中增加调制顺序需要解决方案来提高性能和降低复杂性.
研究的目的:
- 提出并验证混合单载波 (SC) 和直角频率分割多重复合 (OFDM) 连贯光传输方案.
- 为了利用1位带宽的delta-sigma调制 (DSM) 进行简化光学调制和减少数字信号处理 (DSP).
主要方法:
- 一种混合的SC-OFDM方案,使用1位带宽的delta-sigma调制 (DSM) 来进行光学正方位相位移键调制 (QPSK).
- 驱动光学相位/方位 (I/Q) 调制器的I频道和Q频道信号,分别具有SC调制和OFDM调制的数据.
- 离线实验验证使用60Gbaud光学QPSK信号在60公里的SMF-28光纤上进行.
主要成果:
- 混合SC 512QAM和OFDM 512QAM信号的成功高保真传输.
- 对于SC和OFDM组件,实现的比特错误率 (BERs) 低于3.8e-3的硬决策前置错误校正 (HD-FEC) 值.
- 证明有效地抑制量子化噪声,并降低数字信号处理 (DSP) 的复杂性.
结论:
- 拟议的混合SC-OFDM方案与1位DSM为高容量光传输提供了可行的解决方案.
- 这种方法平衡了SC和OFDM的好处,适应不同的道条件和应用.
- 该系统有效地减少了光电子设备的实施复杂性和性能要求.
相关概念视频
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