针对 44.2368 Gbit/s PAM8 信号传输的 FPGA 实现,采用了经过修剪的预等级
Optics letters
|September 1, 2023
概括
本研究展示了使用FPGA技术的强度调制和直接检测系统. 它成功地在45公里的SSMF上以44.2368Gbit/s的速度传输了PAM8信号,满足了没有光学放大器的SD-FEC标准.
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
- 光纤系统 光纤系统
背景情况:
- 强度调制和直接检测 (IM/DD) 系统对于高速光通信至关重要.
- 现场可编程门阵列 (FPGA) 为这些系统的信号处理提供了灵活和高性能的解决方案.
- 在没有光学放大的情况下通过标准单模光纤 (SSMF) 实现高数据速率是一个重大挑战.
研究的目的:
- 展示在FPGA上实施的新型IM/DD系统.
- 为了评估系统在通过延长光纤长度传输高阶脉冲振幅调制 (PAM8) 信号方面的性能.
- 分析等效算法的有效性,以提高信号完整性和实现目标错误校正值.
主要方法:
- 使用FPGA进行信号处理的IM/DD系统的开发.
- 在45公里的SSMF上以44.2368 Gbit/s的总数据速率传输PAM8信号.
- 在发射器中实现了修剪的预等式算法.
- 在接收器上应用并行恒定模块算法 (CMA) 和决策定向最小平均平方 (DD-LMS) 均等器.
- 通过FPGA模拟对比特错误率 (BER) 性能进行分析.
主要成果:
- 在45公里的SSMF上,PAM8信号以44.2368 Gbit/s的速度成功传输.
- 实现软决策前向错误纠正 (SD-FEC) 标准 (2.4 × 10-2).
- 在没有光学放大器的情况下,可以实现36.864 Gbit/s的净比特速率的演示.
- 在DD-LMS等级化之前和之后,分析不同数据长度的BER性能变化.
结论:
- 基于FPGA的IM/DD系统有效地支持通过SSMF传输高速PAM8信号.
- 实施的均等化技术对于满足严格的SD-FEC要求至关重要.
- 该系统在没有光学放大器的情况下运行的能力意味着具有具有成本效益和功率效益的光学通信解决方案的潜力.
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