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相关概念视频

Biasing of FET01:22

Biasing of FET

Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the gate...
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Reconstruction of Signal using Interpolation

Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next sampling...

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在带宽效率高的IM/DD光学互连中,基于FPGA的硬件实现了集成的FEC等级.

Yucai Tian, Junyuan Song, Shaonan Liu

    Optics express
    |November 11, 2025
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    概括

    本研究引入了一种新的集成前置错误校正 (FEC) 均等方案,用于光学PAM4系统,使用极性解码决策最小平均平方 (PD-LMS). PD-LMS方法提高了接收器的灵敏度,并大大降低了硬件的复杂性.

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    相关实验视频

    Last Updated: Jul 11, 2026

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    科学领域:

    • 光学通信是指光学通信的应用.
    • 信号处理 信号处理
    • 错误纠正编码的错误编码

    背景情况:

    • 强度调制直接检测 (IM/DD) 光学系统因带宽有限而面临符号间干扰 (ISI) 的挑战.
    • 4级脉冲振幅调制 (PAM4) 对于高速光学互连至关重要,但对信号退化敏感.
    • 现有的均衡技术可能无法完全解决ISI缓解和错误纠正效率的问题.

    研究的目的:

    • 为光学PAM4系统提出和实验验证一个集成的前置错误校正 (FEC) 均等方案.
    • 为了提高性能,在决策辅助最小平均平方 (LMS) 算法中利用极性代码.
    • 为了减少实际实施中的硬件复杂性.

    主要方法:

    • 开发一个极性解码决策最小平均平方 (PD-LMS) 算法.
    • 整合FEC功能与代重量优化的等级化.
    • 在5GHz带宽的160 Gb/s光学PAM4系统中进行实验演示.
    • 在可现场编程门阵列 (FPGA) 平台上实现,具有可靠性驱动的修剪方案.

    主要成果:

    • 该PD-LMS方案有效地减轻了符号间干扰 (ISI).
    • 在接收器功率灵敏度上实现了1dB的改进.
    • 在FPGA硬件计算复杂性方面实现了显著的67%的减少.
    • 证明了同时实现平衡和提高FEC可靠性.

    结论:

    • 拟议的综合FEC等分策略为高速光学互连提供了一个强大的解决方案.
    • PD-LMS提供了一种有效的方法来平衡等级性能和硬件效率.
    • 可靠性驱动的修剪方案是简化FPGA实施而不影响性能的关键.