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

被引：50

作者：

Giggenbach, Dirk ^{[1
]}

Henniger, Hennes ^{[1
]}

机构：

[1] DLR, German Aerosp Ctr, Inst Commun & Navigat, D-82230 Wessling, Germany

来源：

OPTICAL ENGINEERING | 2008年 / 47卷 / 04期

关键词：

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

D O I：

10.1117/1.2903095

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

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. (C) 2008 Society of Photo-Optical Instrumentation Engineers.

引用

页数：6