| 大气闪烁对近似无衍射激光通信系统的影响 |
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| 引用本文： | 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[J]. 北京航空航天大学学报, 2008, 34(10): 1147-1150 |
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| 作者姓名： | 李萌 王中宇 高晓颖 |
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| 作者单位： | 1.北京航空航天大学 仪器科学与光电工程学院, 北京 100191 |
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| 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.
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| 关 键 词： | 光通信 大气湍流 计算机模拟 误码率 |
| 收稿时间： | 2007-10-10 |
Effect of atmospheric scintillation on laser communication system by pseudo-non-diffracting beam |
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| Li Meng,Wang Zhongyu,Gao Xiaoying. Effect of atmospheric scintillation on laser communication system by pseudo-non-diffracting beam[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(10): 1147-1150 |
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| Authors: | Li Meng Wang Zhongyu Gao Xiaoying |
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| Affiliation: | 1.School of Instrument Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China2. The 12th Institute of the First Academy of China Aerospace Science and Technology Corporation, Beijing 100854, China |
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| 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 si... |
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| Keywords: | optical communication atmospheric turbulence computer simulation bit-error rate |
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