| X射线脉冲星累积脉冲轮廓泊松噪声去除的研究 |
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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.X射线脉冲星累积脉冲轮廓泊松噪声去除的研究[J].光学学报,2011(8):13-19. |
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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射线脉冲星辐射光子探测与累积脉冲轮廓构造模型,分析了通过光子计数获取的累积脉冲轮廓的噪声特点,提出了基于非归一化Haar小波的消噪算法,推导了基于Haar小波消噪的阈值函数的最佳参数计算公式.在X射线脉冲星导航地面模拟系统上进行了实验研究,结果表明,消噪后的累积脉冲轮廓峰值信噪比提高2 dB以上.通过蒙特卡罗模...
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| 关 键 词： | 测量 脉冲星导航 脉冲轮廓 泊松分布 峰值信噪比 Haar小波 |
Poisson Noise Removal for X-Ray Pulsar Integrated Pulse Profile |
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| Abstract: | The photon detection model of X-ray pulsar and the construction of pulsar integrated pulse profile are discussed.The characteristics of pulse profile which is reconstructed by the way of photon counting are analyzed.A de-noising algorithm based on non-normalized Haar wavelet is proposed,and the optimal parameters for wavelet threshold function are derived based on Haar wavelet.The experimental study is done in the ground simulated experimental system for X-ray pulsar navigation.Experimental results show tha... |
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| Keywords: | measurement pulsar navigation pulse profile Poisson distribution peak signal-to-noise ratio Haar wavelet |
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