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Fading-loss assessment in atmospheric free- space optical communication links with on-off keying

机译：具有开关键控的大气自由空间光通信链路中的衰落损耗评估

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摘要

Link-budget calculations are a common way to assess system parameters, such as the required transmitter power and receiver sensitivity, in free-space optical (FSO) communication systems. One of the biggest challenges for long-range FSO deployment is its signal propagation under turbulent atmospheric conditions, which produce intensity fluctuations. Methods to estimate atmospheric-fading loss in radio-frequency systems cannot be adapted to the FSO channel. Until now no general closed-form methods have been developed to describe the fading loss in such a channel. A method to calculate the losses due to scintillation fading in the threshold approach, based on lognormal statistics of the received power, is presented.
机译：在自由空间光（FSO）通信系统中，链路预算计算是评估系统参数（例如所需的发射机功率和接收机灵敏度）的常用方法。远程FSO部署的最大挑战之一是其在动荡的大气条件下的信号传播，这会引起强度波动。估计射频系统中大气衰落损耗的方法无法适应FSO信道。到目前为止，还没有开发出通用的封闭形式方法来描述这种信道中的衰落损耗。提出了一种基于接收功率的对数正态统计来计算阈值方法中由于闪烁衰减而造成的损耗的方法。

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  • 来源
    《Optical engineering》 |2008年第4期|046001.1-046001.6|共6页
  • 作者

    Dirk Giggenbach; Hennes Henniger;

  • 作者单位

    German Aerospace Center (DLR) Institute of Communication and Navigation Muenchnerstrasse 20 82230 Wessling, Germany;

    German Aerospace Center (DLR) Institute of Communication and Navigation Muenchnerstrasse 20 82230 Wessling, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fading loss; free-space optics; link budget; aperture averaging;

    机译：衰落损失自由空间光学;链接预算;孔径平均;

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