基于压缩感知重构算法和形态滤波的AMT近源干扰压制（英文）

发布时间：2018-03-19 11:11

本文选题：压缩感知　切入点：稀疏表示　出处：《Applied Geophysics》2017年04期 　论文类型：期刊论文

【摘要】：进行音频大地电磁法勘探时不可避免的受到近源干扰的影响,限制了该方法的勘探深度。形态滤波法已被证明对于不同形态的大尺度强干扰(通常为低频噪声)有明显的压制作用,但是对于窄脉冲噪声无能为力,为此本文提出一种基于压缩感知重构算法和形态滤波法的近源干扰压制方法(简称MMF-IOMP法),即首先使用形态滤波法滤除大尺度的强干扰,然后采用改进的正交匹配追踪算法进一步滤除形态滤波法残留的类脉冲噪声。为滤除残留的类脉冲噪声并保留AMT有效信号,我们构造了只对类脉冲噪声敏感而对有效部分不敏感的冗余字典。仿真实验以及庐枞矿集区实测数据处理结果表明,所述方法能够克服形态滤波法对于脉冲干扰处理效果不佳以及单一的信号重构算法耗时过长的缺点,在较好的保留有用信号的前提下有效压制音频大地电磁信号中的近源效应。
[Abstract]:Audio magnetotelluric exploration is inevitably affected by near-source interference. The morphological filtering method has been proved to be effective in suppressing large scale strong interference (usually low frequency noise) with different shapes, but there is nothing that can be done for narrow pulse noise. For this reason, this paper proposes a near source interference suppression method (MMF-IOMP method) based on compressed perceptual reconstruction algorithm and morphological filtering method, that is, the morphological filtering method is first used to filter large scale strong interference. Then the improved orthogonal matching tracking algorithm is used to filter the residual impulse noise of the morphological filtering method. In order to filter the residual pulse noise and retain the AMT effective signal, A redundant dictionary which is only sensitive to impulse noise and insensitive to effective part is constructed. The method can overcome the disadvantages of poor effect of morphological filtering for pulse interference processing and time-consuming of a single signal reconstruction algorithm, and effectively suppress the near-source effect in audio magnetotelluric signal under the premise of better retaining useful signal.
【作者单位】：中南大学地球科学与信息物理学院;湖南师范大学物理与信息科学学院;总装工程兵科研一所;山东大学空间科学研究院;
【基金】：supported by the National High Technology Research and Development Program of China(No.2014AA06A602) National Natural Science Foundation of China(No.41404111) Natural Science Foundation of Hunan Province(No.2015JJ3088)
【分类号】：P631.325

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