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相关概念视频

Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Three-dimensional Super Resolution Microscopy of F-actin Filaments by Interferometric PhotoActivated Localization Microscopy iPALM
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维度级星座的拆解和传输方法基于高维星座的选择性映射.

Jianxin Ren, Haojun Liu, Bo Liu

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    概括

    这项研究引入了一种新的维度级星座分解,以改善光学通信. 这种技术可以提高强度调制/直接检测系统中的接收器灵敏度.

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    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:

    • 高维星座提供了更高的数据速率,但在实际实施中面临着挑战.
    • 星座的造型对于优化强度调制/直接检测 (IM/DD) 系统的性能至关重要.

    研究的目的:

    • 提出和验证一个维度级星座分解传输方案.
    • 通过先进的星座成型,提高光通信系统中的接收器灵敏度.

    主要方法:

    • 高维星座的选择性绘制.
    • 使用有限的调整函数和星座点提取.
    • 在2公里的七核光纤IM/DD系统上进行尺寸分解和传输.

    主要成果:

    • 与传统的3D-4符号星座相比,对尺寸分解的3D-4符号星座的接收器灵敏度提高了0.5dB.
    • 对于尺寸分解的3D-8符号星座,与传统的3D-8符号星座相比,接收器灵敏度增加了0.4 dB.

    结论:

    • 维度级星座分解是提高接收器灵敏度的有效策略.
    • 拟议的方案为未来的高容量光通信系统提供了实际的好处.