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首页> 外文期刊>Photonics Journal, IEEE >Modeling and Experimental Study of The Vibration Effects in Urban Free-Space Optical Communication Systems
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Modeling and Experimental Study of The Vibration Effects in Urban Free-Space Optical Communication Systems

机译：城市自由空间光通信系统振动效应的建模与实验研究

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摘要

Free-space optical (FSO) communication, considered as a last-mile technology, is widely used in many urban scenarios. However, the performance of urban free-space optical (UFSO) communication systems fades in the presence of system vibration caused by many factors in the chaotic urban environment. In this paper, we develop a dedicated indoor vibration platform and atmospheric turbulence to estimate the Bifurcated-Gaussian (B-G) distribution model of the receiver optical power under different vibration levels and link distances using nonlinear iteration method. Mean square error (MSE) and coefficient of determination (R-2) metrics have been used to show a good agreement between the PDFs of the experimental data with the resulting B-G distribution model. Besides, the UFSO channel under the effects of both vibration and atmospheric turbulence is also explored under three atmospheric turbulence conditions. Our proposed B-G distribution model describes the vibrating UFSO channels properly and can easily help to perform and evaluate the link performance of UFSO systems, e.g., bit-error-rate (BER), outage probability. Furthermore, this work paves the way for constructing completed auxiliary control subsystems for robust UFSO links and contributes to more extensive optical communication scenarios, such as underwater optical communication, etc.
机译：自由空间光（FSO）通信被视为最后一英里技术，在许多城市场景中得到广泛使用。但是，在混乱的城市环境中，由于许多因素引起的系统振动，城市自由空间光（UFSO）通信系统的性能会下降。在本文中，我们开发了专用的室内振动平台和大气湍流，以非线性迭代方法估算在不同振动水平和链接距离下接收机光功率的分叉高斯（B-G）分布模型。均方误差（MSE）和确定系数（R-2）度量已用于显示实验数据的PDF与生成的B-G分布模型之间的良好一致性。此外，还研究了在三种大气湍流条件下受振动和大气湍流共同作用的UFSO通道。我们提出的B-G分布模型正确描述了振动的UFSO通道，可以轻松地帮助执行和评估UFSO系统的链路性能，例如误码率（BER），中断概率。此外，这项工作为构建健壮的UFSO链路的完整辅助控制子系统铺平了道路，并为更广泛的光通信场景做出了贡献，例如水下光通信等。

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