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相关概念视频

IR Frequency Region: X–H Stretching01:24

IR Frequency Region: X–H Stretching

1.0K
In IR spectroscopy, signals produced by the X−H bonds (such as C−H, O−H, or N−H) can be observed in the frequency range of  2700–4000 cm–1. The C−H stretching vibration forms sharp bands in the region 2850–3000 cm–1. The presence of the O−H stretching vibration leads to the forming of an absorption band in the frequency range 3650–3200 cm−1. At the same time, N−H stretching can be confirmed by absorption bands in...
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Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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相关实验视频

Updated: Jul 16, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

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具有可适应内核宽度的KRLS后变形器用于可见光通信.

Jieling Wang, Xinzhi Wang, Ba-Zhong Shen

    Optics express
    |September 15, 2023
    PubMed
    概括
    此摘要是机器生成的。

    这项研究引入了一种新的后扭曲方案,使用具有自适应内核宽度的内核递归最小方形 (KRLS-GN-ENC) 来改善可见光通信 (VLC) 质量,通过减轻发光二极管 (LED) 非线性.

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    相关实验视频

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    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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    科学领域:

    • 无线通信无线通信
    • 光学工程是指光学工程.
    • 信号处理 信号处理

    背景情况:

    • 可见光通信 (VLC) 是高速数据传输的关键技术,补充了5G无线网络.
    • 发光二极管 (LED) 的非线性特性引入信号扭曲,降低VLC的性能.
    • 现有的线性化技术可能面临适应性学习和记忆效率的局限性.

    研究的目的:

    • 提出和评估一种新的扭曲后方案,以减轻VLC系统中的LED非线性.
    • 提高线性化算法的自适应学习能力和内存效率.
    • 为了提高VLC链接中的总体通信质量和数据传输速率.

    主要方法:

    • 一个复制内核希尔伯特空间 (RKHS) 基于后扭曲方案,使用具有自适应内核宽度的内核递归最小平方 (KRLS).
    • 整合高斯-牛顿 (GN) 算法,在递归KRLS过程中动态更新内核宽度.
    • 纳入增强的新性标准 (ENC) 适应性稀疏字典学习,优化在内存限制下的线性化.

    主要成果:

    • 与KRLS-ENC方法相比,拟议的KRLS-GN-ENC方案显示出显著的性能改善.
    • 与经典的多项式过技术相比,KRLS-GN-ENC实现了更高的非线性补偿.
    • 该方案在其线性化过程中表现出更快的收速度.

    结论:

    • 该KRLS-GN-ENC方案有效地减轻VLC系统中的非线性损伤.
    • 适应性内核宽度和稀疏的字典学习提高了线性化性能和效率.
    • 这种方法为高质量,高速的VLC提供了一个有希望的解决方案.