| 自由空间光通信的最大后验概率检测 |
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| 引用本文： | 高宠,马晶,谭立英,于思源,潘锋.自由空间光通信的最大后验概率检测[J].光电工程,2007,34(3):54-56,62. |
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| 作者姓名： | 高宠 马晶 谭立英 于思源 潘锋 |
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| 作者单位： | 哈尔滨工业大学,可调谐激光技术国家级重点实验室,黑龙江,哈尔滨,150001 |
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| 摘 要： | 为了减小大气闪烁对自由空间光通信的通信性能的影响,基于光信号的对数振幅序列服从联合高斯分布特性,提出了一种最大后验概率算法,给出了随时间变化的判决阈值.模拟结果表明,此算法可以有效减小大气闪烁对通信性能的影响,降低其误码率.
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| 关 键 词： | 自由空间光通信 联合高斯分布 最大后验概率检测 大气闪烁 |
| 文章编号： | 1003-501X（2007）03-0054-03 |
| 收稿时间： | 2006/7/1 |
| 修稿时间： | 2006-07-012007-01-03 |
Maximum a posteriori probability detection for free-space optical communication |
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| GAO Chong,MA Jing,TAN Li-ying,YU Si-yuan,PAN Feng.Maximum a posteriori probability detection for free-space optical communication[J].Opto-Electronic Engineering,2007,34(3):54-56,62. |
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| Authors: | GAO Chong MA Jing TAN Li-ying YU Si-yuan PAN Feng |
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| Affiliation: | National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | Based on the joint Gaussian distribution of optical signal log-amplitude sequence,an algorithm for Maximum a posteriori probability(MAP) detection was proposed to mitigate effects of atmospheric scintillation on the performance of the free-space optical communication.And the bit error rate for the proposed algorithm was simulated.Simulation results show that the proposed algorithm for MAP detection based on the joint Gaussian distribution mitigates effects of atmospheric scintillation on the communication performance and leads to a furthest improvement in detection performance,compared with maximum-likelihood symbol-by-symbol detection and MAP symbol-by-symbol detection. |
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| Keywords: | Free-space optical communication Joint Gaussian distribution Maximum a posteriori probability detection Atmospheric scintillation |
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