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[1]YANG Runhai,TAN Junqing,XIANG Ya,et al.High Precision Seismic Wave Velocity Interferometry Based on Modified Chirp Z Transform[J].Journal of Seismological Research,2020,43(01):1-9.

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High Precision Seismic Wave Velocity Interferometry Based on Modified Chirp Z Transform

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 43 Number of periods: 2020 01 Page number: 1-9 Column: Public date: 2020-01-30

Title:: High Precision Seismic Wave Velocity Interferometry Based on Modified Chirp Z Transform

Author(s):: YANG Runhai¹; TAN Junqing²; XIANG Ya³; JIANG Jinzhong¹; WANG Bin¹; (1.Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)(2.Yunnan University,Kunming 650091,Yunnan,China)(3.Key Laboratory of Earthquake Geodesy,Institute of Seismology,China Earthquake Administration,Wuhan 430071,Hubei,China)

Keywords:: seismic wave velocity; short time window delay estimation; MCZT; FICP

CLC:: P315.3

DOI:: -

Abstract:: Underground medium are studied by using seismic wave structure change has received more and more attention.Time delay accurate estimate of the seismic signal is the key to understand the nature of crustal medium change and its process.The time delay detection method based on cross-correlation affected by relevant window length and signal SNR is larger.MCZT(Modified Chirp Z Transform)spectrum elaboration and fine interpolation of correlation peak(FICP)is introduced into the land the large capacity air rifle interference wave velocity measurement of active source observation.This paper introduces a way can get high precision time a short window of time delay estimation method.The experimental analysis shows that,the method introduced in this paper can obtain the high precision estimate of signal delay and improve the accuracy of measuring the change of wave velocity of seismic signals.

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Last Update: 2020-01-30