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Instantaneous Attributes Analysis of Seismic Signals Using Improved HHT 被引量:2
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作者 Yuqing Wang Zhenming Peng Yanmin He 《Journal of Earth Science》 SCIE CAS CSCD 2015年第4期515-521,共7页
As the key technique of improved Hilbert-Huang transform (HHT), ensemble empiri- cal mode decomposition (EEMD) has a good performance of eliminating mode mixing phenomenon, which has a strong impact on the observa... As the key technique of improved Hilbert-Huang transform (HHT), ensemble empiri- cal mode decomposition (EEMD) has a good performance of eliminating mode mixing phenomenon, which has a strong impact on the observation of seismic information. However, the intrinsic mode functions (IMF) obtained from EEMD contain noises, so that it is required to find a more robust frequency estimation method to calculate the instantaneous frequency (IF) of IMF. For this reason, the improved HHT algorithm based on the damped instantaneous frequency (DIF) is proposed to overcome the shortage of EEMD. Compared with other IF estimation methods, the DIF has strong antinoise ability and high estimation accuracy. The test results of synthetic and real seismic data show that the proposed algorithm is feasible and effective for extracting seismic instantaneous at- tributes. 展开更多
关键词 mode mixing ensemble empirical mode decomposition (EEMD) damped instantaneous frequency (DIF) frequency estimation seismic instantaneous attributes.
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