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X-ray pulsar signal de-noising for impulse noise using wavelet packet

机译：利用小波包对脉冲噪声进行X射线脉冲星信号降噪

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摘要

In order to solve the impact of the impulse noise in the universe on the long time epoch folding of X-ray pulsar profile, an innovative denoising method using the wavelet packet transformation is proposed. First, the system model containing noisy signal for X-ray pulsar is established. The time series of X-ray pulsar are sampled as certain time interval and folded as its rotational period. Secondly, the signal transformed by wavelet packet is computed according to the given entropy, aiming to obtain the optimum basis. Finally, the impulse noise is filtered with the proper threshold. The experimental results show that the impulse noise can be filtered by the proposed method, and the algorithm improves the signal-to-noise ratio (SNR) by about 40% compared with other methods under low SNR conditions. (C) 2017 Elsevier Masson SAS. All rights reserved.
机译：为了解决宇宙中脉冲噪声对X射线脉冲星剖面长时间历元折叠的影响，提出了一种利用小波包变换的新颖去噪方法。首先，建立了包含X射线脉冲星噪声信号的系统模型。 X射线脉冲星的时间序列按一定的时间间隔进行采样，并按其旋转周期进行折叠。其次，根据给定的熵来计算经小波包变换的信号，以求得最优的基础。最后，用适当的阈值过滤脉冲噪声。实验结果表明，该方法可以滤除脉冲噪声，在低信噪比条件下，与其他方法相比，该算法可以将信噪比提高约40％。 （C）2017 Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2017年第5期|147-153|共7页
  • 作者

    Liu Xiuping; Yuan Wei; Han Lili; Jing Junfeng; Xu Jian; Su Zebin; Sun Haifeng;

  • 作者单位

    Xian Polytech Univ, Coll Elect & Informat, Xian 710048, Shaanxi, Peoples R China;

    Inst Shanghai Satellite Engineer, Shanghai 200240, Peoples R China;

    Xian Univ Technol, Xian 710048, Shaanxi, Peoples R China;

    Xian Polytech Univ, Coll Elect & Informat, Xian 710048, Shaanxi, Peoples R China;

    Xian Polytech Univ, Coll Elect & Informat, Xian 710048, Shaanxi, Peoples R China;

    Xian Polytech Univ, Coll Elect & Informat, Xian 710048, Shaanxi, Peoples R China;

    Xidian Univ, Sch Aerosp Sci & Technol, Xian 710071, Shaanxi, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    X-ray pulsar; Impulse noise; De-noising; Wavelet packet;

    机译：X射线脉冲星;脉冲噪声;去噪;小波包;

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