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| 实际大气中无线光通信的系统差错性能 | |
| 引用本文： | 李菲,侯再红,吴毅. 实际大气中无线光通信的系统差错性能[J]. 光学学报, 2012, 32(9): 906003-46 |
| 作者姓名： | 李菲 侯再红 吴毅 |
| 作者单位： | 李菲:中国科学院安徽光学精密机械研究所大气成分与光学重点实验室, 安徽 合肥 230031中国科学技术大学物理学院光学与光学工程系, 安徽 合肥 230026 侯再红:中国科学院安徽光学精密机械研究所大气成分与光学重点实验室, 安徽 合肥 230031 吴毅:中国科学院安徽光学精密机械研究所大气成分与光学重点实验室, 安徽 合肥 230031 |
| 基金项目： | 国家863计划(2006AA861062)资助课题。 |
| 摘 要： | 无线光通信(FSO)系统的性能受大气湍流影响会产生剧烈波动。根据系统和大气参数评估系统差错性能的研究具有现实意义。以大气湍流信道和光电探测模型为基础,使用拟合概率分布替换常用的对数正态分布,建立了FSO系统差错性能的数学仿真模型,改进了湍流条件下系统误码率计算公式,并且进行全天的验证实验。实验结果显示,光强概率分布对系统性能有显著的影响,原有公式在某些情况下的计算结果有较大偏差,而改进公式的计算结果具有更好的适应性和准确性。该改进公式可有效评估湍流条件下FSO系统性能,并为相关理论研究提供参考。 |
| 关 键 词： | 大气光学 无线光通信 误码率 大气湍流 光强起伏 概率分布 |
| 收稿时间： | 2011-12-14 |
Error Performance for Free Space Optical Communication Systems in a Real Turbulent Atmosphere |
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| Li Fei,Hou Zaihong,Wu Yi. Error Performance for Free Space Optical Communication Systems in a Real Turbulent Atmosphere[J]. Acta Optica Sinica, 2012, 32(9): 906003-46 | |
| Authors: | Li Fei Hou Zaihong Wu Yi |
| Affiliation: | 1Key Laboratory of Atmospheric Composition and Optical Radiation,Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Hefei,Anhui 230031,China 2Department of Optics and Optical Engineering,School of Physical Sciences,University of Science and Technology of China,Hefei,Anhui 230026,China 3State Key Laboratory of Pulsed Power Laser Technology,Department of Optoelectronics, Electronic Engineering Institute of PLA,Hefei,Anhui 230037,China |
| Abstract: | Performance of free-space optical communication (FSO) system fluctuates greatly, which is influenced by atmospheric turbulence. Research about evaluating system error performance according to parameters of system and atmosphere is a subject with certain practical significance. Based on both optical turbulence channel and photoelectric detection model, a mathematic simulation model of error performance for FSO system is established. A modified expression of bit error rate for FSO system through turbulent atmosphere is proposed, and an experiment of 24 hours′ duration is carried out to test the expression. It shows that intensity probability distribution has a significant influence on system error performance. The results of original expression are inconsistent with experimental data on certain conditions, and the modified expression has better applicability and accuracy. The modified expression can lead to an efficient performance evaluation and provide reference to correlative researches. |
| Keywords: | atmospheric optics free-space optical communications bit error rate atmospheric turbulence intensity fluctuation probability distribution |
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