The estimation of instantaneous frequency of seismic signal
文献类型：期刊论文
| 作者 | Chen Lin1,2; Song Hai-Bin1 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2009 |
| 卷号 | 52期号:1页码:206-214 |
| 关键词 | Instantaneous frequency Seismic signal FIR differentiator Time-frequency representation |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | We compare four types of methods for estimating instantaneous frequency. The phase difference estimator is susceptible to noise. The zero-crossing estimator is suitable for periodic signal and is not good enough for non-periodic signal. However, the results of the zero-crossing method can be improved by interpolating the signal. There are three FIR differentiator methods. The instantaneous frequency computed with the two-point FIR differentiator resembles the standard instantaneous frequency, but this method introduces a half-sample time shift. This can be avoided by using a three-point FIR differentiator, but the estimating spikes have a tendency to be negative. The Claerbout's method not only can introduce a half-sample time shift, but also can produce results greater than Nyquist frequency. We present a new formula based on the Claerbout's formula. Using this formula, the half-sample time shift can be avoid and the negative spikes can be suppressed. The results calculated with the one-order frequency moment of a time-frequency representation (TFR) are smooth and withstand noise. At last, we calculate the instantaneous frequency section of a seismic post-stack section from the northeastern South China Sea using the new presented formula and the one-order frequency moment of TFR, and compare the results with the instantaneous frequencies which is computed with a related function in Seismic Unix software. The results indicate that the estimations calculated with the new formula are good enough. |
| WOS关键词 | TRACE ANALYSIS ; ATTRIBUTES ; GAS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000262974800023 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/71404]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chen Lin |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen Lin,Song Hai-Bin. The estimation of instantaneous frequency of seismic signal[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2009,52(1):206-214. |
| APA | Chen Lin,&Song Hai-Bin.(2009).The estimation of instantaneous frequency of seismic signal.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,52(1),206-214. |
| MLA | Chen Lin,et al."The estimation of instantaneous frequency of seismic signal".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 52.1(2009):206-214. |
入库方式： OAI收割
来源：地质与地球物理研究所
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