低复杂度的联合时钟恢复和基于波德率定时相位错误检测器的自适应等级,用于短距离数字连贯传输
Optics letters
|August 15, 2023
概括
这项研究引入了针对数字连贯接收器的改进的联合时钟恢复和自适应均等 (JCA) 方案. 新方法显著降低了计算负载,提高了接收器的灵敏度,解决了以前用于高速光学传输的JCA方法的局限性.
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
背景情况:
- 联合时钟恢复和自适应均等 (JCA) 方案减轻了数字连贯接收器中的时钟异步和色谱分散 (CD) 等问题.
- 之前的JCA方案在自适应均等器 (AEQ) 中遭受了高计算负载,无法弥补接收器斜率或处理具有小滚动因子 (ROF) 的Nyquist信号.
研究的目的:
- 提出一个新的JCA方案,克服超高速短距离连贯传输现有方法的局限性.
- 为了减少AEQ的计算复杂性,并提高对接收器斜和小ROF的耐受性.
主要方法:
- 整合了两部分实值 (RV) AEQ与全数字反时钟恢复算法 (CRA).
- 使用与各种ROF兼容的 baud-rate定时相位错误检测器 (TPED).
主要成果:
- 拟议的JCA方案将AEQ计算负载在61GBaud双极化Nyquist 16QAM信号的10公里传输中减少约70%.
- 与以前的方案相比,对于1.5 ps的接收器斜率,接收器灵敏度提高了超过1.7 dB.
结论:
- 开发的JCA方案为超高速短距离连贯传输提供了全面和高效的解决方案.
- 它有效地解决了一些挑战,包括CD,接收器斜率,时钟异步和具有小ROF的Nyquist信号,这对于低功耗,高光谱效率应用至关重要.
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