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题名:
Modified moment-matching method for estimating pointing parameters in the presence of atmospheric turbulence
作者: Zhang, Yu1,2,3; Li, Xinyang1,2; Rao, Changhui1,2
刊名: Applied Optics
出版日期: 2012
卷号: 51, 期号:10, 页码:C144-C151
学科分类: Atmospheric turbulence - Communication systems - Optical communication - Turbomachinery
DOI: 10.1364/AO.51.00C144
通讯作者: Zhang, Y. (xyli@ioe.ac.cn)
文章类型: 期刊论文
中文摘要: An accurate pointing system is required in free-space optical (FSO) communication links. Low energytransmission efficiency caused by pointing errors would decline the communication system's performance. The statistics of the detected signal or return signal values could be used to estimate the pointing parameters, whereas atmospheric turbulence brings in serious challenges. A modified moment-matching estimation method is presented in this paper. The irradiance fluctuation caused by the atmospheric turbulence is considered, and the probability density function (PDF) in a weak turbulence condition is assumed to be lognormal. This modified approach is evaluated with wave-propagation simulation data and shows significant improvement over the conventional approach. The estimation accuracy and the properties of this new approach are also discussed. Although our method is based on lognormal irradiance PDF under a weak turbulence condition, the irradiance PDF would tend to be lognormal with aperture averaging effect under moderate to strong turbulence, and the ideas can be extended with appropriate PDF models to satisfy different conditions. 2012 Optical Society of America.
英文摘要: An accurate pointing system is required in free-space optical (FSO) communication links. Low energytransmission efficiency caused by pointing errors would decline the communication system's performance. The statistics of the detected signal or return signal values could be used to estimate the pointing parameters, whereas atmospheric turbulence brings in serious challenges. A modified moment-matching estimation method is presented in this paper. The irradiance fluctuation caused by the atmospheric turbulence is considered, and the probability density function (PDF) in a weak turbulence condition is assumed to be lognormal. This modified approach is evaluated with wave-propagation simulation data and shows significant improvement over the conventional approach. The estimation accuracy and the properties of this new approach are also discussed. Although our method is based on lognormal irradiance PDF under a weak turbulence condition, the irradiance PDF would tend to be lognormal with aperture averaging effect under moderate to strong turbulence, and the ideas can be extended with appropriate PDF models to satisfy different conditions. 2012 Optical Society of America.
收录类别: Ei
语种: 英语
WOS记录号: WOS:000302859900025
ISSN号: 1559128X
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/6300
Appears in Collections:自适应光学技术研究室(八室)_期刊论文

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作者单位: 1. Key Laboratory on Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China
2. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
3. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Recommended Citation:
Zhang, Yu,Li, Xinyang,Rao, Changhui. Modified moment-matching method for estimating pointing parameters in the presence of atmospheric turbulence[J]. Applied Optics,2012,51(10):C144-C151.
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