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首页> 外文期刊>Journal of Optics >Communication performance of free space optical link using wavelength diversity in strong atmospheric turbulence
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Communication performance of free space optical link using wavelength diversity in strong atmospheric turbulence

机译:在强大气湍流中使用波长分集的自由空间光链路的通信性能

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摘要

Atmospheric turbulence can be considered as one of the main problems facing FSO communication systems, which degrades the performance in terms of bit error rate. The objective of this paper is to examine the use of wavelength diversity in free-space optics to mitigate the effect of turbulence on the received optical signal. As the refractive index variation will be different for different wavelengths, the fading is not same for different wavelength and different paths at the same time. The signals traveling through turbulent atmosphere undergo different amount of intensity fluctuations. The effect of atmospheric turbulence and scintillation cause intensity fluctuation of optical beam thus increasing the bit error rate (BER). In this paper wavelength diversity technique is proposed to reduce the fading under strong atmospheric turbulence condition. Mathematical expressions are derived for the estimation of the outage probability under strong atmospheric turbulence conditions and considerable improvement is found using wavelength diversity.
机译:大气湍流可以被认为是FSO通信系统面临的主要问题之一,这在误码率方面降低了性能。本文的目的是研究在自由空间光学中使用波长分集来减轻湍流对接收到的光信号的影响。由于不同波长的折射率变化将不同,因此对于不同波长和同时不同路径的衰落并不相同。通过湍流的信号会经历不同程度的强度波动。大气湍流和闪烁的影响导致光束的强度波动,从而增加了误码率(BER)。本文提出了一种波长分集技术,以减少强大气湍流条件下的衰落。推导了数学表达式以估计在强烈的大气湍流条件下的中断概率,并且使用波长分集发现了相当大的改进。

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