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Adaptive Ground‐Roll Suppression Based on Adaptive Chirp Mode Decomposition in the Fx Domain.

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Title: Adaptive Ground‐Roll Suppression Based on Adaptive Chirp Mode Decomposition in the Fx Domain.
Authors: Li, Zhiwei1 (AUTHOR), Shi, Ying1,2 (AUTHOR) shiying@nepu.edu.cn, Wang, Ning1 (AUTHOR) wangn2311@163.com, Chen, Siyuan1 (AUTHOR), Song, Zhaojun1 (AUTHOR)
Source: Geophysical Prospecting. Sep2026, Vol. 74 Issue 7, p1-13. 13p.
Subject Terms: *Adaptive signal processing, *Adaptive filters, *Noise
Abstract: Ground roll severely affects the signal‐to‐noise ratio of seismic data. Characterized by low frequency, strong energy and low‐velocity, it significantly masks the primary reflections. Ground roll manifests as a non‐stationary, frequency‐modulated signal in the fx domain. To separate the intrinsic mode functions (IMFs) containing ground roll, we propose a pre‐stack ground‐roll suppression method based on adaptive chirp mode decomposition in the fx domain (fx‐ACMD). The fx‐ACMD algorithm iteratively optimizes through three steps: demodulation, adaptive filtering and reconstruction. This framework incorporates greedy recursive decomposition and adaptive bandwidth updating. The application of time‐varying demodulation operators makes it particularly suitable for adaptive mode decomposition of non‐stationary signals. By further exploiting the localized high‐wavenumber characteristic of ground roll in the fx domain, we propose fx‐adaptive ACMD (fx‐AACMD). The fx‐AACMD operates without manual intervention and applies the data‐driven IMFs selection strategy to automatically identify ground‐roll‐containing IMFs. Through localized filtering, it effectively suppresses ground roll while maintaining stability and preserving amplitudes. Tests on synthetic and field data confirm that the proposed methods achieve effective suppression of ground roll. [ABSTRACT FROM AUTHOR]
Database: Academic Search Index
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  Data: Adaptive Ground‐Roll Suppression Based on Adaptive Chirp Mode Decomposition in the Fx Domain.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Zhiwei%22">Li, Zhiwei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shi%2C+Ying%22">Shi, Ying</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> shiying@nepu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Ning%22">Wang, Ning</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wangn2311@163.com</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Siyuan%22">Chen, Siyuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Zhaojun%22">Song, Zhaojun</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Geophysical+Prospecting%22">Geophysical Prospecting</searchLink>. Sep2026, Vol. 74 Issue 7, p1-13. 13p.
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  Data: *<searchLink fieldCode="DE" term="%22Adaptive+signal+processing%22">Adaptive signal processing</searchLink><br />*<searchLink fieldCode="DE" term="%22Adaptive+filters%22">Adaptive filters</searchLink><br />*<searchLink fieldCode="DE" term="%22Noise%22">Noise</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Ground roll severely affects the signal‐to‐noise ratio of seismic data. Characterized by low frequency, strong energy and low‐velocity, it significantly masks the primary reflections. Ground roll manifests as a non‐stationary, frequency‐modulated signal in the fx domain. To separate the intrinsic mode functions (IMFs) containing ground roll, we propose a pre‐stack ground‐roll suppression method based on adaptive chirp mode decomposition in the fx domain (fx‐ACMD). The fx‐ACMD algorithm iteratively optimizes through three steps: demodulation, adaptive filtering and reconstruction. This framework incorporates greedy recursive decomposition and adaptive bandwidth updating. The application of time‐varying demodulation operators makes it particularly suitable for adaptive mode decomposition of non‐stationary signals. By further exploiting the localized high‐wavenumber characteristic of ground roll in the fx domain, we propose fx‐adaptive ACMD (fx‐AACMD). The fx‐AACMD operates without manual intervention and applies the data‐driven IMFs selection strategy to automatically identify ground‐roll‐containing IMFs. Through localized filtering, it effectively suppresses ground roll while maintaining stability and preserving amplitudes. Tests on synthetic and field data confirm that the proposed methods achieve effective suppression of ground roll. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1111/1365-2478.70222
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 1
    Subjects:
      – SubjectFull: Adaptive signal processing
        Type: general
      – SubjectFull: Adaptive filters
        Type: general
      – SubjectFull: Noise
        Type: general
    Titles:
      – TitleFull: Adaptive Ground‐Roll Suppression Based on Adaptive Chirp Mode Decomposition in the Fx Domain.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Li, Zhiwei
      – PersonEntity:
          Name:
            NameFull: Shi, Ying
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            NameFull: Wang, Ning
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            NameFull: Chen, Siyuan
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            NameFull: Song, Zhaojun
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          Dates:
            – D: 01
              M: 09
              Text: Sep2026
              Type: published
              Y: 2026
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              Value: 00168025
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              Value: 74
            – Type: issue
              Value: 7
          Titles:
            – TitleFull: Geophysical Prospecting
              Type: main
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