| 一种基于泊松分布的提高X射线脉冲星脉冲轮廓信噪比的方法 |
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| 引用本文： | 胡慧君,赵宝升,盛立志,鄢秋荣,杨颢,陈宝梅. 一种基于泊松分布的提高X射线脉冲星脉冲轮廓信噪比的方法[J]. 中国科学:物理学 力学 天文学, 2011, 0(8): 1015-1020 |
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| 作者姓名： | 胡慧君 赵宝升 盛立志 鄢秋荣 杨颢 陈宝梅 |
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| 作者单位： | 中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室;中国科学院研究生院; |
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| 摘 要： | 论述了X射线脉冲星辐射模型和脉冲轮廓构造算法,提出了以Kullback-leibler距离函数作为评价标准,提高具有泊松分布规律的X射线脉冲星脉冲轮廓信噪比的平滑算法,推导了平滑参数和平滑累积脉冲轮廓的计算公式.搭建了X射线脉冲星导航地面模拟系统,实现了对模拟X射线脉冲星单光子到达时间的记录及X射线脉冲星脉冲轮廓的构造,得到了X射线脉冲到达时间TOA.在X射线脉冲星导航地面模拟系统上,对平滑算法进行了验证,结果表明该算法对于提高累积脉冲轮廓的信噪比效果显著,信噪比提高大于10dB.
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| 关 键 词： | X射线脉冲星导航 脉冲轮廓 信噪比 泊松分布 |
A method for improving the SNR of X-ray pulsar pulse profile based on Poisson distribution |
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| HU HuiJun,,ZHAO BaoSheng,SHENG LiZhi,,YAN QiuRong,YANG Hao, , CHEN BaoMei, State Key Laboratory of Transient Optics , Photonics,Xi'an Institute of Optics , Precision Mechanics of Chinese Academy of Science,Xi'an ,China, Graduate University of Chinese Academy of Sciences,Beijing. A method for improving the SNR of X-ray pulsar pulse profile based on Poisson distribution[J]. SCIENCE CHINA Physics, Mechanics & Astronomy, 2011, 0(8): 1015-1020 |
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| Authors: | HU HuiJun ZHAO BaoSheng SHENG LiZhi YAN QiuRong YANG Hao & CHEN BaoMei State Key Laboratory of Transient Optics Photonics Xi'an Institute of Optics Precision Mechanics of Chinese Academy of Science Xi'an China Graduate University of Chinese Academy of Sciences Beijing |
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| Affiliation: | HU HuiJun1,2*,ZHAO BaoSheng1,SHENG LiZhi1,2,YAN QiuRong1,YANG Hao1,2 & CHEN BaoMei1,2 1 State Key Laboratory of Transient Optics and Photonics,Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science,Xi'an 710119,China,2 Graduate University of Chinese Academy of Sciences,Beijing 100039 |
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| Abstract: | The radiation model of pulsar and the construction of pulsar integrated pulse profile are discussed,and a smoothing algorithm for improving the SNR of pulsar integrated pulse profile which obeys Poisson distribution is proposed based on Kullback-leibler distance function.The formula for calculating smoothing parameter and smoothing integrated pulse profile are deduced.A simulation experiment system for X-ray pulsar based navigation is setup in order to study the key technologies of X-ray pulsar navigation.T... |
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| Keywords: | pulsar navigation pulsar profile SNR Poisson distribution |
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