在四模光纤系统中,使用SNR增强的信号传输方案与delta-sigma调制
Optics letters
|December 1, 2023
概括
本研究介绍了三角信号调制 (DSM) 以提高移动前程系统的信号噪声比 (SNR). 这使得超高顺序的QAM信号可以通过少数模式光纤传输,从而提高了系统性能.
科学领域:
- 光学通信是指光学通信.
- 信号处理 信号处理
- 光纤光学是指光纤的使用.
背景情况:
- 移动前线运输系统需要高容量和高性能.
- 现有的系统在信号噪声比 (SNR) 和调制顺序方面存在局限性.
- 少数模式光纤 (FMF) 和模式分割多重复合 (MDM) 提供了增加容量的潜力.
研究的目的:
- 提出和演示一个新的方案,以优化SNR在移动前线运输的四模式MDM系统.
- 在MDM系统中,通过三角信号调制 (DSM) 实现超高阶调制.
- 通过在FMF上进行实验性传输来验证拟议的方案.
主要方法:
- 实现一个1位的三角信号调制 (DSM) 方案.
- 使用四模复杂化 (MDM) 系统架构.
- 实验性传输1048576-QAM信号超过50公里的强合少数模式光纤 (FMF).
- 采用数字信号处理 (DSP) 进行信号恢复和错误纠正.
主要成果:
- 从发射器数字信号处理 (Tx DSP) 获得了1位数字化信号,其SNR为60dB.
- 在50公里的FMF上成功传输了超高级1048576-QAM信号.
- 在四种模式传输中,比特错误率 (BER) 低于20%的软决策前错误校正 (20% SD-FEC) 值2.4 × 10−2的水平.
- 首次展示了DSM技术和强合MDM系统的组合.
- 达到在MDM系统中报告的DSM的最高调制顺序.
结论:
- 拟议的DSM方案有效优化SNR,以提高MDM系统的性能.
- 实验结果证实了使用新方法在FMF上进行超高阶QAM传输的可行性.
- 该计划为未来超大容量移动前线运输网络提供了一个有希望的解决方案.
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