自由空间光通信系统的性能：气溶胶引起的低层大气变暖的影响。

Performance of free-space optical communication systems: effect of aerosol-induced lower atmospheric warming.

作者信息

Sunilkumar K, Anand N, Satheesh S K, Krishna Moorthy K, Ilavazhagan G

出版信息

Opt Express. 2019 Apr 15;27(8):11303-11311. doi: 10.1364/OE.27.011303.

DOI:10.1364/OE.27.011303

Abstract

We report the effect of aerosol-induced local atmospheric heating and the resulting changes in the lower atmospheric optical turbulence on the performance of Free-Space Optical (FSO) communication links. A closed form mathematical expression is derived to estimate the influence of aerosol-induced warming on the Bit Error Rate (BER) of a Binary Phase Shift Keying FSO communication link through Gamma-Gamma modeled turbulence. Our results demonstrate a strong impact, with the aerosol-induced turbulence taking a toll on the signal-to-noise ratio of ~20 dB for a BER of 10. Aerosol-induced warming produces significant variations in BER compared to the clear atmospheric conditions and can subdue the benefits of improved beam alignment.

摘要

我们报告了气溶胶引起的局部大气加热以及由此导致的低层大气光学湍流变化对自由空间光（FSO）通信链路性能的影响。通过伽马-伽马模型化的湍流，推导了一个封闭形式的数学表达式，以估计气溶胶引起的变暖对二进制相移键控FSO通信链路误码率（BER）的影响。我们的结果表明影响显著，对于误码率为10的情况，气溶胶引起的湍流会使信噪比损失约20 dB。与晴朗大气条件相比，气溶胶引起的变暖会使误码率产生显著变化，并且会削弱改善光束对准带来的益处。