大气闪烁对近似无衍射激光通信系统的影响

李 萌; 王中宇; 高晓颖

大气闪烁对近似无衍射激光通信系统的影响

1.
北京航空航天大学仪器科学与光电工程学院, 北京 100191
2. 中国航天科技集团公司一院12所, 北京100854

基金项目: 航天科技创新基金资助项目(2006-2007)

详细信息

作者简介:
李萌(1982-),男,山西侯马人,博士生,limenglee@aspe.buaa.edu.cn.

中图分类号: TN 929.12
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出版历程
- 收稿日期: 2007-10-10
- 网络出版日期: 2008-10-31

Effect of atmospheric scintillation on laser communication system by pseudo-non-diffracting beam

1.
School of Instrument Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2. The 12th Institute of the First Academy of China Aerospace Science and Technology Corporation, Beijing 100854, China

摘要

摘要: 在近似无衍射激光通信系统中,大气湍流的作用导致接收端光强起伏不定,这将对通信系统的误码率产生影响.以光强起伏的概率分布为基础,忽略系统中的其他噪声,推导出折射率结构常数、通信距离和激光波长等影响因素与误码率的关系式.通过计算机模拟,研究了误码率随折射率结构常数的变化规律,讨论了一定湍流强度下通信距离和激光波长对误码率的影响,并以10^-9为误码率标准,确定了通信距离的允许范围.结果表明,合理地选择天气和日照条件、减小通信距离以及选择长波长的激光器可以减弱大气湍流对误码率的影响.
- 光通信 /
- 大气湍流 /
- 计算机模拟 /
- 误码率
Abstract: In pseudo-non-diffracting beam communication system, the intensity variance on the receiver is brought by atmospheric turbulence, and thus the bit-error rate(BER) of the communication system could be effected. Ignoring other noises in the system, the relationship between BER with the refractive index structure parameter, communication distance and wavelength was deducted based on the distribution of intensity variance. The changing law of BER along with index structure parameter was researched through computer simulation, the impact of communication distance and wavelength on BER was discussed and the allowed range of communication distance was determinated under BER criterion of 10^-9. It is indicated that the atmospheric turbulence-s effect to BER can be weaken by choosing appropriate weather and sunlight condition, decreasing communication distance and using laser with longer wavelength.
- optical communication /
- atmospheric turbulence /
- computer simulation /
- bit-error rate

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